diff --git a/Cargo.lock b/Cargo.lock
index 4112bb2..25ac861 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -17,11 +17,26 @@ version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f26201604c87b1e01bd3d98f8d5d9a8fcbb815e8cedb41ffccbeb4bf593a35fe"
 
+[[package]]
+name = "android-tzdata"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e999941b234f3131b00bc13c22d06e8c5ff726d1b6318ac7eb276997bbb4fef0"
+
+[[package]]
+name = "android_system_properties"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "819e7219dbd41043ac279b19830f2efc897156490d7fd6ea916720117ee66311"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "anyhow"
-version = "1.0.82"
+version = "1.0.83"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f538837af36e6f6a9be0faa67f9a314f8119e4e4b5867c6ab40ed60360142519"
+checksum = "25bdb32cbbdce2b519a9cd7df3a678443100e265d5e25ca763b7572a5104f5f3"
 
 [[package]]
 name = "ascii"
@@ -42,9 +57,9 @@ dependencies = [
 
 [[package]]
 name = "autocfg"
-version = "1.2.0"
+version = "1.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f1fdabc7756949593fe60f30ec81974b613357de856987752631dea1e3394c80"
+checksum = "0c4b4d0bd25bd0b74681c0ad21497610ce1b7c91b1022cd21c80c6fbdd9476b0"
 
 [[package]]
 name = "backtrace"
@@ -105,9 +120,9 @@ checksum = "514de17de45fdb8dc022b1a7975556c53c86f9f0aa5f534b98977b171857c2c9"
 
 [[package]]
 name = "cc"
-version = "1.0.96"
+version = "1.0.97"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "065a29261d53ba54260972629f9ca6bffa69bac13cd1fed61420f7fa68b9f8bd"
+checksum = "099a5357d84c4c61eb35fc8eafa9a79a902c2f76911e5747ced4e032edd8d9b4"
 
 [[package]]
 name = "cfg-if"
@@ -121,9 +136,12 @@ version = "0.4.38"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a21f936df1771bf62b77f047b726c4625ff2e8aa607c01ec06e5a05bd8463401"
 dependencies = [
+ "android-tzdata",
+ "iana-time-zone",
  "js-sys",
  "num-traits",
  "wasm-bindgen",
+ "windows-targets 0.52.5",
 ]
 
 [[package]]
@@ -311,9 +329,9 @@ dependencies = [
 
 [[package]]
 name = "getrandom"
-version = "0.2.14"
+version = "0.2.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "94b22e06ecb0110981051723910cbf0b5f5e09a2062dd7663334ee79a9d1286c"
+checksum = "c4567c8db10ae91089c99af84c68c38da3ec2f087c3f82960bcdbf3656b6f4d7"
 dependencies = [
  "cfg-if",
  "js-sys",
@@ -541,6 +559,29 @@ dependencies = [
  "tracing",
 ]
 
+[[package]]
+name = "iana-time-zone"
+version = "0.1.60"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e7ffbb5a1b541ea2561f8c41c087286cc091e21e556a4f09a8f6cbf17b69b141"
+dependencies = [
+ "android_system_properties",
+ "core-foundation-sys",
+ "iana-time-zone-haiku",
+ "js-sys",
+ "wasm-bindgen",
+ "windows-core",
+]
+
+[[package]]
+name = "iana-time-zone-haiku"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f31827a206f56af32e590ba56d5d2d085f558508192593743f16b2306495269f"
+dependencies = [
+ "cc",
+]
+
 [[package]]
 name = "idna"
 version = "0.5.0"
@@ -567,6 +608,15 @@ version = "2.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8f518f335dce6725a761382244631d86cf0ccb2863413590b31338feb467f9c3"
 
+[[package]]
+name = "iso8601"
+version = "0.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "924e5d73ea28f59011fec52a0d12185d496a9b075d360657aed2a5707f701153"
+dependencies = [
+ "nom",
+]
+
 [[package]]
 name = "itertools"
 version = "0.12.1"
@@ -609,6 +659,16 @@ version = "0.4.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "01cda141df6706de531b6c46c3a33ecca755538219bd484262fa09410c13539c"
 
+[[package]]
+name = "lock_api"
+version = "0.4.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "07af8b9cdd281b7915f413fa73f29ebd5d55d0d3f0155584dade1ff18cea1b17"
+dependencies = [
+ "autocfg",
+ "scopeguard",
+]
+
 [[package]]
 name = "log"
 version = "0.4.21"
@@ -633,6 +693,12 @@ version = "0.3.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6877bb514081ee2a7ff5ef9de3281f14a4dd4bceac4c09388074a6b5df8a139a"
 
+[[package]]
+name = "minimal-lexical"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "68354c5c6bd36d73ff3feceb05efa59b6acb7626617f4962be322a825e61f79a"
+
 [[package]]
 name = "miniz_oxide"
 version = "0.7.2"
@@ -671,11 +737,21 @@ dependencies = [
  "tempfile",
 ]
 
+[[package]]
+name = "nom"
+version = "7.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d273983c5a657a70a3e8f2a01329822f3b8c8172b73826411a55751e404a0a4a"
+dependencies = [
+ "memchr",
+ "minimal-lexical",
+]
+
 [[package]]
 name = "num-traits"
-version = "0.2.18"
+version = "0.2.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "da0df0e5185db44f69b44f26786fe401b6c293d1907744beaa7fa62b2e5a517a"
+checksum = "071dfc062690e90b734c0b2273ce72ad0ffa95f0c74596bc250dcfd960262841"
 dependencies = [
  "autocfg",
 ]
@@ -849,6 +925,29 @@ dependencies = [
  "num-traits",
 ]
 
+[[package]]
+name = "parking_lot"
+version = "0.12.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7e4af0ca4f6caed20e900d564c242b8e5d4903fdacf31d3daf527b66fe6f42fb"
+dependencies = [
+ "lock_api",
+ "parking_lot_core",
+]
+
+[[package]]
+name = "parking_lot_core"
+version = "0.9.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1e401f977ab385c9e4e3ab30627d6f26d00e2c73eef317493c4ec6d468726cf8"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "redox_syscall",
+ "smallvec",
+ "windows-targets 0.52.5",
+]
+
 [[package]]
 name = "percent-encoding"
 version = "2.3.1"
@@ -908,6 +1007,21 @@ dependencies = [
  "unicode-ident",
 ]
 
+[[package]]
+name = "prometheus"
+version = "0.13.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3d33c28a30771f7f96db69893f78b857f7450d7e0237e9c8fc6427a81bae7ed1"
+dependencies = [
+ "cfg-if",
+ "fnv",
+ "lazy_static",
+ "memchr",
+ "parking_lot",
+ "protobuf",
+ "thiserror",
+]
+
 [[package]]
 name = "prost"
 version = "0.12.4"
@@ -931,6 +1045,12 @@ dependencies = [
  "syn 2.0.60",
 ]
 
+[[package]]
+name = "protobuf"
+version = "2.28.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "106dd99e98437432fed6519dedecfade6a06a73bb7b2a1e019fdd2bee5778d94"
+
 [[package]]
 name = "quote"
 version = "1.0.36"
@@ -970,6 +1090,15 @@ dependencies = [
  "getrandom",
 ]
 
+[[package]]
+name = "redox_syscall"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "469052894dcb553421e483e4209ee581a45100d31b4018de03e5a7ad86374a7e"
+dependencies = [
+ "bitflags 2.5.0",
+]
+
 [[package]]
 name = "reqwest"
 version = "0.12.4"
@@ -1062,13 +1191,19 @@ dependencies = [
  "windows-sys 0.52.0",
 ]
 
+[[package]]
+name = "scopeguard"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "94143f37725109f92c262ed2cf5e59bce7498c01bcc1502d7b9afe439a4e9f49"
+
 [[package]]
 name = "security-framework"
-version = "2.10.0"
+version = "2.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "770452e37cad93e0a50d5abc3990d2bc351c36d0328f86cefec2f2fb206eaef6"
+checksum = "c627723fd09706bacdb5cf41499e95098555af3c3c29d014dc3c458ef6be11c0"
 dependencies = [
- "bitflags 1.3.2",
+ "bitflags 2.5.0",
  "core-foundation",
  "core-foundation-sys",
  "libc",
@@ -1077,9 +1212,9 @@ dependencies = [
 
 [[package]]
 name = "security-framework-sys"
-version = "2.10.0"
+version = "2.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "41f3cc463c0ef97e11c3461a9d3787412d30e8e7eb907c79180c4a57bf7c04ef"
+checksum = "317936bbbd05227752583946b9e66d7ce3b489f84e11a94a510b4437fef407d7"
 dependencies = [
  "core-foundation-sys",
  "libc",
@@ -1309,16 +1444,15 @@ dependencies = [
 
 [[package]]
 name = "tokio-util"
-version = "0.7.10"
+version = "0.7.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5419f34732d9eb6ee4c3578b7989078579b7f039cbbb9ca2c4da015749371e15"
+checksum = "9cf6b47b3771c49ac75ad09a6162f53ad4b8088b76ac60e8ec1455b31a189fe1"
 dependencies = [
  "bytes",
  "futures-core",
  "futures-sink",
  "pin-project-lite",
  "tokio",
- "tracing",
 ]
 
 [[package]]
@@ -1571,6 +1705,25 @@ dependencies = [
  "wasm-bindgen",
 ]
 
+[[package]]
+name = "web-time"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5a6580f308b1fad9207618087a65c04e7a10bc77e02c8e84e9b00dd4b12fa0bb"
+dependencies = [
+ "js-sys",
+ "wasm-bindgen",
+]
+
+[[package]]
+name = "windows-core"
+version = "0.52.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "33ab640c8d7e35bf8ba19b884ba838ceb4fba93a4e8c65a9059d08afcfc683d9"
+dependencies = [
+ "windows-targets 0.52.5",
+]
+
 [[package]]
 name = "windows-sys"
 version = "0.48.0"
@@ -1786,18 +1939,21 @@ dependencies = [
 name = "worker-rust"
 version = "0.1.0"
 dependencies = [
+ "chrono",
  "getrandom",
  "graphql_client",
- "http 0.2.12",
+ "iso8601",
  "opentelemetry",
  "opentelemetry-http",
  "opentelemetry-otlp",
  "opentelemetry-stdout",
  "opentelemetry_sdk",
+ "prometheus",
  "reqwest",
  "serde",
  "serde_json",
  "tokio",
+ "web-time",
  "worker",
 ]
 
diff --git a/Cargo.toml b/Cargo.toml
index 87073ab..b07df9d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -19,8 +19,11 @@ getrandom = { version = "0.2.14", features = ["js"] }
 serde_json = "1.0.116"
 opentelemetry-http = { version="0.11.1" }
 opentelemetry-otlp = { version="0.15.0", features = ["metrics", "http-proto"], default-features = false }
-http = { version = "0.2.12"}
 tokio = { version = "1.37.0"}
+prometheus = "0.13.4"
+iso8601 = "0.6.1"
+web-time = "1.1.0"
+chrono = "0.4.38"
 
 [profile.release]
 opt-level = "s" # optimize for size in release builds
diff --git a/features/o11y.feature b/features/o11y.feature
index 237b836..c410e56 100644
--- a/features/o11y.feature
+++ b/features/o11y.feature
@@ -4,4 +4,7 @@ Feature: OpenTelemetry metrics
     Given Worker is configured to send metrics to a mock OpenTelemetry collector
     When  Worker is triggered
     Then  Worker metrics are published
-    And   Meter name should include "cloudflare_worker_requests"
+    And   Metric name should include "cloudflare_worker_requests"
+    And   Metric name should include "cloudflare_worker_errors"
+    And   Metric name should include "cloudflare_worker_cpu_time"
+    And   Metric name should include "cloudflare_worker_duration"
diff --git a/features/step_definitions/mf.ts b/features/step_definitions/mf.ts
index 4d94deb..9b36bae 100644
--- a/features/step_definitions/mf.ts
+++ b/features/step_definitions/mf.ts
@@ -61,6 +61,7 @@ export class MiniflareDriver {
                     METRICS_URL: self.config.metricsUrl,
                     CLOUDFLARE_API_URL: self.config.cloudflareApiUrl,
                     CLOUDFLARE_API_KEY: "fake-key",
+                    CLOUDFLARE_ACCOUNT_ID: "1234",
                 },
                 modulesRules: [
                     { type: "CompiledWasm", include: ["**/*.wasm"], fallthrough: true },
diff --git a/features/step_definitions/o11y_steps.ts b/features/step_definitions/o11y_steps.ts
index 5b4c6c8..8113b3e 100644
--- a/features/step_definitions/o11y_steps.ts
+++ b/features/step_definitions/o11y_steps.ts
@@ -23,7 +23,7 @@ Then('Worker metrics are published', async function () {
     expect(metrics).to.have.length.gte(1);
 });
 
-Then('Meter name should include {string}', function (metricName: string) {
+Then('Metric name should include {string}', function (metricName: string) {
     let metricNames = otelServer.getMetricNames();
     expect(metricNames).to.include(metricName);
 });
diff --git a/features/step_definitions/worker_query_response.json b/features/step_definitions/worker_query_response.json
index 78fee26..6a1e5a4 100644
--- a/features/step_definitions/worker_query_response.json
+++ b/features/step_definitions/worker_query_response.json
@@ -6,1538 +6,464 @@
           "workersInvocationsAdaptive": [
             {
               "dimensions": {
-                "datetime": "2024-05-04T03:21:35Z",
-                "scriptName": "my-worker",
-                "status": "clientDisconnected"
-              },
-              "quantiles": {
-                "cpuTimeP50": 165526,
-                "cpuTimeP99": 165526
-              },
-              "sum": {
-                "errors": 0,
-                "requests": 1,
-                "subrequests": 2
-              }
-            },
-            {
-              "dimensions": {
-                "datetime": "2024-05-04T05:29:14Z",
-                "scriptName": "my-worker",
-                "status": "clientDisconnected"
-              },
-              "quantiles": {
-                "cpuTimeP50": 898907,
-                "cpuTimeP99": 898907
-              },
-              "sum": {
-                "errors": 0,
-                "requests": 1,
-                "subrequests": 2
-              }
-            },
-            {
-              "dimensions": {
-                "datetime": "2024-05-04T05:48:47Z",
-                "scriptName": "my-worker",
-                "status": "success"
-              },
-              "quantiles": {
-                "cpuTimeP50": 450428,
-                "cpuTimeP99": 450428
-              },
-              "sum": {
-                "errors": 0,
-                "requests": 1,
-                "subrequests": 2
-              }
-            },
-            {
-              "dimensions": {
-                "datetime": "2024-05-04T19:21:47Z",
-                "scriptName": "my-worker",
-                "status": "clientDisconnected"
-              },
-              "quantiles": {
-                "cpuTimeP50": 10506,
-                "cpuTimeP99": 10506
-              },
-              "sum": {
-                "errors": 0,
-                "requests": 1,
-                "subrequests": 2
-              }
-            },
-            {
-              "dimensions": {
-                "datetime": "2024-05-04T04:29:10Z",
-                "scriptName": "my-worker",
-                "status": "success"
-              },
-              "quantiles": {
-                "cpuTimeP50": 51489,
-                "cpuTimeP99": 51489
-              },
-              "sum": {
-                "errors": 0,
-                "requests": 1,
-                "subrequests": 2
-              }
-            },
-            {
-              "dimensions": {
-                "datetime": "2024-05-04T01:16:40Z",
-                "scriptName": "my-worker",
-                "status": "clientDisconnected"
-              },
-              "quantiles": {
-                "cpuTimeP50": 41602,
-                "cpuTimeP99": 41602
-              },
-              "sum": {
-                "errors": 0,
-                "requests": 1,
-                "subrequests": 2
-              }
-            },
-            {
-              "dimensions": {
-                "datetime": "2024-05-05T00:18:38Z",
-                "scriptName": "my-worker",
-                "status": "clientDisconnected"
-              },
-              "quantiles": {
-                "cpuTimeP50": 61421,
-                "cpuTimeP99": 61421
-              },
-              "sum": {
-                "errors": 0,
-                "requests": 1,
-                "subrequests": 2
-              }
-            },
-            {
-              "dimensions": {
-                "datetime": "2024-05-04T01:32:25Z",
-                "scriptName": "my-worker",
-                "status": "success"
-              },
-              "quantiles": {
-                "cpuTimeP50": 10958,
-                "cpuTimeP99": 10958
-              },
-              "sum": {
-                "errors": 0,
-                "requests": 1,
-                "subrequests": 2
-              }
-            },
-            {
-              "dimensions": {
-                "datetime": "2024-05-04T19:27:35Z",
-                "scriptName": "my-worker",
-                "status": "success"
-              },
-              "quantiles": {
-                "cpuTimeP50": 6957,
-                "cpuTimeP99": 6957
-              },
-              "sum": {
-                "errors": 0,
-                "requests": 1,
-                "subrequests": 2
-              }
-            },
-            {
-              "dimensions": {
-                "datetime": "2024-05-04T04:47:12Z",
-                "scriptName": "my-worker",
-                "status": "clientDisconnected"
-              },
-              "quantiles": {
-                "cpuTimeP50": 28291,
-                "cpuTimeP99": 28291
-              },
-              "sum": {
-                "errors": 0,
-                "requests": 1,
-                "subrequests": 2
-              }
-            },
-            {
-              "dimensions": {
-                "datetime": "2024-05-04T05:38:18Z",
-                "scriptName": "my-worker",
-                "status": "clientDisconnected"
-              },
-              "quantiles": {
-                "cpuTimeP50": 982910,
-                "cpuTimeP99": 982910
-              },
-              "sum": {
-                "errors": 0,
-                "requests": 1,
-                "subrequests": 2
-              }
-            },
-            {
-              "dimensions": {
-                "datetime": "2024-05-04T05:20:58Z",
-                "scriptName": "my-worker",
-                "status": "success"
-              },
-              "quantiles": {
-                "cpuTimeP50": 1489675,
-                "cpuTimeP99": 1489675
-              },
-              "sum": {
-                "errors": 0,
-                "requests": 1,
-                "subrequests": 2
-              }
-            },
-            {
-              "dimensions": {
-                "datetime": "2024-05-04T18:21:05Z",
-                "scriptName": "my-worker",
-                "status": "clientDisconnected"
-              },
-              "quantiles": {
-                "cpuTimeP50": 77070,
-                "cpuTimeP99": 77070
-              },
-              "sum": {
-                "errors": 0,
-                "requests": 1,
-                "subrequests": 2
-              }
-            },
-            {
-              "dimensions": {
-                "datetime": "2024-05-04T06:03:05Z",
-                "scriptName": "my-worker",
-                "status": "success"
-              },
-              "quantiles": {
-                "cpuTimeP50": 1446354,
-                "cpuTimeP99": 1446354
-              },
-              "sum": {
-                "errors": 0,
-                "requests": 1,
-                "subrequests": 2
-              }
-            },
-            {
-              "dimensions": {
-                "datetime": "2024-05-04T01:54:02Z",
-                "scriptName": "my-worker",
-                "status": "success"
-              },
-              "quantiles": {
-                "cpuTimeP50": 6886,
-                "cpuTimeP99": 6886
-              },
-              "sum": {
-                "errors": 0,
-                "requests": 1,
-                "subrequests": 2
-              }
-            },
-            {
-              "dimensions": {
-                "datetime": "2024-05-04T05:17:59Z",
-                "scriptName": "my-worker",
-                "status": "clientDisconnected"
-              },
-              "quantiles": {
-                "cpuTimeP50": 32774,
-                "cpuTimeP99": 32774
-              },
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+                "requests": 1
               }
             },
             {
               "dimensions": {
-                "datetime": "2024-05-04T06:02:25Z",
-                "scriptName": "my-worker",
+                "datetime": "2024-05-05T01:00:01Z",
+                "scriptName": "otlp-forwarder-worker-prod",
                 "status": "success"
               },
               "quantiles": {
-                "cpuTimeP50": 1459426,
-                "cpuTimeP99": 1459426
+                "cpuTimeP50": 3736,
+                "cpuTimeP75": 3736,
+                "cpuTimeP99": 3736,
+                "cpuTimeP999": 3736,
+                "durationP50": 0.012805625,
+                "durationP75": 0.012805625,
+                "durationP99": 0.012805625,
+                "durationP999": 0.012805625
               },
               "sum": {
+                "duration": 0.012805625,
                 "errors": 0,
-                "requests": 1,
-                "subrequests": 2
+                "requests": 1
               }
             },
             {
               "dimensions": {
-                "datetime": "2024-05-04T05:47:42Z",
-                "scriptName": "my-worker",
+                "datetime": "2024-05-05T01:00:57Z",
+                "scriptName": "otlp-forwarder-worker-prod",
                 "status": "success"
               },
               "quantiles": {
-                "cpuTimeP50": 29254,
-                "cpuTimeP99": 29254
-              },
-              "sum": {
-                "errors": 0,
-                "requests": 1,
-                "subrequests": 2
-              }
-            },
-            {
-              "dimensions": {
-                "datetime": "2024-05-05T00:51:48Z",
-                "scriptName": "my-worker",
-                "status": "clientDisconnected"
-              },
-              "quantiles": {
-                "cpuTimeP50": 145956,
-                "cpuTimeP99": 145956
-              },
-              "sum": {
-                "errors": 0,
-                "requests": 1,
-                "subrequests": 2
-              }
-            },
-            {
-              "dimensions": {
-                "datetime": "2024-05-04T03:15:50Z",
-                "scriptName": "my-worker",
-                "status": "clientDisconnected"
-              },
-              "quantiles": {
-                "cpuTimeP50": 8913,
-                "cpuTimeP99": 22184
+                "cpuTimeP50": 4022,
+                "cpuTimeP75": 4022,
+                "cpuTimeP99": 4022,
+                "cpuTimeP999": 4022,
+                "durationP50": 0.026200375,
+                "durationP75": 0.026200375,
+                "durationP99": 0.026200375,
+                "durationP999": 0.026200375
               },
               "sum": {
+                "duration": 0.026200375,
                 "errors": 0,
-                "requests": 2,
-                "subrequests": 4
+                "requests": 1
               }
             },
             {
               "dimensions": {
-                "datetime": "2024-05-04T06:16:54Z",
-                "scriptName": "my-worker",
+                "datetime": "2024-05-05T01:00:36Z",
+                "scriptName": "otlp-forwarder-worker-prod",
                 "status": "success"
               },
               "quantiles": {
-                "cpuTimeP50": 1011029,
-                "cpuTimeP99": 1011029
+                "cpuTimeP50": 6373,
+                "cpuTimeP75": 6373,
+                "cpuTimeP99": 6373,
+                "cpuTimeP999": 6373,
+                "durationP50": 0.0433325,
+                "durationP75": 0.0433325,
+                "durationP99": 0.0433325,
+                "durationP999": 0.0433325
               },
               "sum": {
+                "duration": 0.0433325,
                 "errors": 0,
-                "requests": 1,
-                "subrequests": 2
+                "requests": 1
               }
             },
             {
               "dimensions": {
-                "datetime": "2024-05-04T18:21:05Z",
-                "scriptName": "my-worker",
+                "datetime": "2024-05-05T01:00:26Z",
+                "scriptName": "otlp-forwarder-worker-prod",
                 "status": "success"
               },
               "quantiles": {
-                "cpuTimeP50": 519936,
-                "cpuTimeP99": 519936
-              },
-              "sum": {
-                "errors": 0,
-                "requests": 1,
-                "subrequests": 2
-              }
-            },
-            {
-              "dimensions": {
-                "datetime": "2024-05-04T05:45:18Z",
-                "scriptName": "my-worker",
-                "status": "clientDisconnected"
-              },
-              "quantiles": {
-                "cpuTimeP50": 1318946,
-                "cpuTimeP99": 1318946
+                "cpuTimeP50": 3559,
+                "cpuTimeP75": 3559,
+                "cpuTimeP99": 3559,
+                "cpuTimeP999": 3559,
+                "durationP50": 0.04107925,
+                "durationP75": 0.04107925,
+                "durationP99": 0.04107925,
+                "durationP999": 0.04107925
               },
               "sum": {
+                "duration": 0.041079250000000005,
                 "errors": 0,
-                "requests": 1,
-                "subrequests": 2
+                "requests": 1
               }
             },
             {
               "dimensions": {
-                "datetime": "2024-05-05T00:06:57Z",
-                "scriptName": "my-worker",
+                "datetime": "2024-05-05T01:00:46Z",
+                "scriptName": "otlp-forwarder-worker-dev",
                 "status": "success"
               },
               "quantiles": {
-                "cpuTimeP50": 70159,
-                "cpuTimeP99": 70159
-              },
-              "sum": {
-                "errors": 0,
-                "requests": 1,
-                "subrequests": 2
-              }
-            },
-            {
-              "dimensions": {
-                "datetime": "2024-05-04T04:05:49Z",
-                "scriptName": "my-worker",
-                "status": "clientDisconnected"
-              },
-              "quantiles": {
-                "cpuTimeP50": 101584,
-                "cpuTimeP99": 101584
-              },
-              "sum": {
-                "errors": 0,
-                "requests": 1,
-                "subrequests": 2
-              }
-            },
-            {
-              "dimensions": {
-                "datetime": "2024-05-04T04:32:31Z",
-                "scriptName": "my-worker",
-                "status": "clientDisconnected"
-              },
-              "quantiles": {
-                "cpuTimeP50": 75435,
-                "cpuTimeP99": 75435
+                "cpuTimeP50": 5312,
+                "cpuTimeP75": 5312,
+                "cpuTimeP99": 5312,
+                "cpuTimeP999": 5312,
+                "durationP50": 0.014188875,
+                "durationP75": 0.014188875,
+                "durationP99": 0.014188875,
+                "durationP999": 0.014188875
               },
               "sum": {
+                "duration": 0.014188875,
                 "errors": 0,
-                "requests": 1,
-                "subrequests": 2
+                "requests": 1
               }
             },
             {
               "dimensions": {
-                "datetime": "2024-05-04T17:55:20Z",
-                "scriptName": "my-worker",
+                "datetime": "2024-05-05T01:00:56Z",
+                "scriptName": "otlp-forwarder-worker-prod",
                 "status": "success"
               },
               "quantiles": {
-                "cpuTimeP50": 32105,
-                "cpuTimeP99": 32105
+                "cpuTimeP50": 4622,
+                "cpuTimeP75": 4622,
+                "cpuTimeP99": 4622,
+                "cpuTimeP999": 4622,
+                "durationP50": 0.043582626,
+                "durationP75": 0.043582626,
+                "durationP99": 0.043582626,
+                "durationP999": 0.043582626
               },
               "sum": {
+                "duration": 0.043582625,
                 "errors": 0,
-                "requests": 1,
-                "subrequests": 2
+                "requests": 1
               }
             },
             {
               "dimensions": {
-                "datetime": "2024-05-04T05:08:33Z",
-                "scriptName": "my-worker",
+                "datetime": "2024-05-05T01:00:23Z",
+                "scriptName": "otlp-forwarder-worker-prod",
                 "status": "success"
               },
               "quantiles": {
-                "cpuTimeP50": 1477290,
-                "cpuTimeP99": 1477290
+                "cpuTimeP50": 3190,
+                "cpuTimeP75": 3190,
+                "cpuTimeP99": 3190,
+                "cpuTimeP999": 3190,
+                "durationP50": 0.012188125,
+                "durationP75": 0.012188125,
+                "durationP99": 0.012188125,
+                "durationP999": 0.012188125
               },
               "sum": {
+                "duration": 0.012188125,
                 "errors": 0,
-                "requests": 1,
-                "subrequests": 2
+                "requests": 1
               }
             },
             {
               "dimensions": {
-                "datetime": "2024-05-04T04:00:55Z",
-                "scriptName": "my-worker",
+                "datetime": "2024-05-05T01:00:24Z",
+                "scriptName": "otlp-forwarder-worker-prod",
                 "status": "success"
               },
               "quantiles": {
-                "cpuTimeP50": 116508,
-                "cpuTimeP99": 116508
-              },
-              "sum": {
-                "errors": 0,
-                "requests": 1,
-                "subrequests": 2
-              }
-            },
-            {
-              "dimensions": {
-                "datetime": "2024-05-04T04:10:47Z",
-                "scriptName": "my-worker",
-                "status": "clientDisconnected"
-              },
-              "quantiles": {
-                "cpuTimeP50": 108043,
-                "cpuTimeP99": 108043
-              },
-              "sum": {
-                "errors": 0,
-                "requests": 1,
-                "subrequests": 2
-              }
-            },
-            {
-              "dimensions": {
-                "datetime": "2024-05-04T04:40:58Z",
-                "scriptName": "my-worker",
-                "status": "clientDisconnected"
-              },
-              "quantiles": {
-                "cpuTimeP50": 44887,
-                "cpuTimeP99": 44887
+                "cpuTimeP50": 3283,
+                "cpuTimeP75": 3283,
+                "cpuTimeP99": 3283,
+                "cpuTimeP999": 3283,
+                "durationP50": 0.043589376,
+                "durationP75": 0.043589376,
+                "durationP99": 0.043589376,
+                "durationP999": 0.043589376
               },
               "sum": {
+                "duration": 0.043589375,
                 "errors": 0,
-                "requests": 1,
-                "subrequests": 2
+                "requests": 1
               }
             },
             {
               "dimensions": {
-                "datetime": "2024-05-04T05:13:11Z",
-                "scriptName": "my-worker",
+                "datetime": "2024-05-05T01:00:19Z",
+                "scriptName": "otlp-forwarder-worker-prod",
                 "status": "success"
               },
               "quantiles": {
-                "cpuTimeP50": 1559088,
-                "cpuTimeP99": 1559088
+                "cpuTimeP50": 3632,
+                "cpuTimeP75": 3632,
+                "cpuTimeP99": 3632,
+                "cpuTimeP999": 3632,
+                "durationP50": 0.0413035,
+                "durationP75": 0.0413035,
+                "durationP99": 0.0413035,
+                "durationP999": 0.0413035
               },
               "sum": {
+                "duration": 0.0413035,
                 "errors": 0,
-                "requests": 1,
-                "subrequests": 2
+                "requests": 1
               }
             },
             {
               "dimensions": {
-                "datetime": "2024-05-04T19:22:18Z",
-                "scriptName": "my-worker",
+                "datetime": "2024-05-05T01:00:54Z",
+                "scriptName": "otlp-forwarder-worker-prod",
                 "status": "success"
               },
               "quantiles": {
-                "cpuTimeP50": 311130,
-                "cpuTimeP99": 311130
+                "cpuTimeP50": 5414,
+                "cpuTimeP75": 5414,
+                "cpuTimeP99": 5414,
+                "cpuTimeP999": 5414,
+                "durationP50": 0.042014,
+                "durationP75": 0.042014,
+                "durationP99": 0.042014,
+                "durationP999": 0.042014
               },
               "sum": {
+                "duration": 0.042014,
                 "errors": 0,
-                "requests": 1,
-                "subrequests": 2
+                "requests": 1
               }
             },
             {
               "dimensions": {
-                "datetime": "2024-05-04T05:52:22Z",
-                "scriptName": "my-worker",
+                "datetime": "2024-05-05T01:00:02Z",
+                "scriptName": "otlp-forwarder-worker-prod",
                 "status": "success"
               },
               "quantiles": {
-                "cpuTimeP50": 1819849,
-                "cpuTimeP99": 1819849
+                "cpuTimeP50": 5182,
+                "cpuTimeP75": 5182,
+                "cpuTimeP99": 5182,
+                "cpuTimeP999": 5182,
+                "durationP50": 0.054845374,
+                "durationP75": 0.054845374,
+                "durationP99": 0.054845374,
+                "durationP999": 0.054845374
               },
               "sum": {
+                "duration": 0.054845374999999995,
                 "errors": 0,
-                "requests": 1,
-                "subrequests": 2
+                "requests": 1
               }
             },
             {
               "dimensions": {
-                "datetime": "2024-05-04T04:21:32Z",
-                "scriptName": "my-worker",
+                "datetime": "2024-05-05T01:00:50Z",
+                "scriptName": "otlp-forwarder-worker-prod",
                 "status": "success"
               },
               "quantiles": {
-                "cpuTimeP50": 45432,
-                "cpuTimeP99": 55368
-              },
-              "sum": {
-                "errors": 0,
-                "requests": 2,
-                "subrequests": 4
-              }
-            },
-            {
-              "dimensions": {
-                "datetime": "2024-05-04T04:58:23Z",
-                "scriptName": "my-worker",
-                "status": "clientDisconnected"
-              },
-              "quantiles": {
-                "cpuTimeP50": 64081,
-                "cpuTimeP99": 64081
-              },
-              "sum": {
-                "errors": 0,
-                "requests": 1,
-                "subrequests": 2
-              }
-            },
-            {
-              "dimensions": {
-                "datetime": "2024-05-04T13:58:44Z",
-                "scriptName": "my-worker",
-                "status": "clientDisconnected"
-              },
-              "quantiles": {
-                "cpuTimeP50": 41575,
-                "cpuTimeP99": 41575
-              },
-              "sum": {
-                "errors": 0,
-                "requests": 1,
-                "subrequests": 2
-              }
-            },
-            {
-              "dimensions": {
-                "datetime": "2024-05-04T06:14:02Z",
-                "scriptName": "my-worker",
-                "status": "clientDisconnected"
-              },
-              "quantiles": {
-                "cpuTimeP50": 298021,
-                "cpuTimeP99": 298021
-              },
-              "sum": {
-                "errors": 0,
-                "requests": 1,
-                "subrequests": 2
-              }
-            },
-            {
-              "dimensions": {
-                "datetime": "2024-05-04T05:18:04Z",
-                "scriptName": "my-worker",
-                "status": "clientDisconnected"
-              },
-              "quantiles": {
-                "cpuTimeP50": 35646,
-                "cpuTimeP99": 35646
+                "cpuTimeP50": 9972,
+                "cpuTimeP75": 9972,
+                "cpuTimeP99": 9972,
+                "cpuTimeP999": 9972,
+                "durationP50": 0.0423945,
+                "durationP75": 0.0423945,
+                "durationP99": 0.0423945,
+                "durationP999": 0.0423945
               },
               "sum": {
+                "duration": 0.0423945,
                 "errors": 0,
-                "requests": 1,
-                "subrequests": 2
+                "requests": 1
               }
             },
             {
               "dimensions": {
-                "datetime": "2024-05-05T00:41:48Z",
-                "scriptName": "my-worker",
+                "datetime": "2024-05-05T01:00:15Z",
+                "scriptName": "otlp-forwarder-worker-prod",
                 "status": "success"
               },
               "quantiles": {
-                "cpuTimeP50": 63339,
-                "cpuTimeP99": 63339
+                "cpuTimeP50": 4044,
+                "cpuTimeP75": 4044,
+                "cpuTimeP99": 4044,
+                "cpuTimeP999": 4044,
+                "durationP50": 0.054611124,
+                "durationP75": 0.054611124,
+                "durationP99": 0.054611124,
+                "durationP999": 0.054611124
               },
               "sum": {
+                "duration": 0.054611125,
                 "errors": 0,
-                "requests": 1,
-                "subrequests": 2
+                "requests": 1
               }
             },
             {
               "dimensions": {
-                "datetime": "2024-05-04T04:11:25Z",
-                "scriptName": "my-worker",
+                "datetime": "2024-05-05T01:00:40Z",
+                "scriptName": "otlp-forwarder-worker-prod",
                 "status": "success"
               },
               "quantiles": {
-                "cpuTimeP50": 59538,
-                "cpuTimeP99": 59538
-              },
-              "sum": {
-                "errors": 0,
-                "requests": 1,
-                "subrequests": 2
-              }
-            },
-            {
-              "dimensions": {
-                "datetime": "2024-05-04T05:31:20Z",
-                "scriptName": "my-worker",
-                "status": "clientDisconnected"
-              },
-              "quantiles": {
-                "cpuTimeP50": 654924,
-                "cpuTimeP99": 654924
-              },
-              "sum": {
-                "errors": 0,
-                "requests": 1,
-                "subrequests": 2
-              }
-            },
-            {
-              "dimensions": {
-                "datetime": "2024-05-04T04:21:32Z",
-                "scriptName": "my-worker",
-                "status": "clientDisconnected"
-              },
-              "quantiles": {
-                "cpuTimeP50": 15615,
-                "cpuTimeP99": 15615
+                "cpuTimeP50": 3707,
+                "cpuTimeP75": 3707,
+                "cpuTimeP99": 3707,
+                "cpuTimeP999": 3707,
+                "durationP50": 0.0428685,
+                "durationP75": 0.0428685,
+                "durationP99": 0.0428685,
+                "durationP999": 0.0428685
               },
               "sum": {
+                "duration": 0.0428685,
                 "errors": 0,
-                "requests": 1,
-                "subrequests": 2
+                "requests": 1
               }
             },
             {
               "dimensions": {
-                "datetime": "2024-05-04T04:03:32Z",
-                "scriptName": "my-worker",
+                "datetime": "2024-05-05T01:00:06Z",
+                "scriptName": "otlp-forwarder-worker-prod",
                 "status": "success"
               },
               "quantiles": {
-                "cpuTimeP50": 25235,
-                "cpuTimeP99": 25235
-              },
-              "sum": {
-                "errors": 0,
-                "requests": 1,
-                "subrequests": 2
-              }
-            },
-            {
-              "dimensions": {
-                "datetime": "2024-05-04T03:33:59Z",
-                "scriptName": "my-worker",
-                "status": "clientDisconnected"
-              },
-              "quantiles": {
-                "cpuTimeP50": 65821,
-                "cpuTimeP99": 128732
+                "cpuTimeP50": 4460,
+                "cpuTimeP75": 4460,
+                "cpuTimeP99": 4460,
+                "cpuTimeP999": 4460,
+                "durationP50": 0.0432345,
+                "durationP75": 0.0432345,
+                "durationP99": 0.0432345,
+                "durationP999": 0.0432345
               },
               "sum": {
+                "duration": 0.043234499999999995,
                 "errors": 0,
-                "requests": 2,
-                "subrequests": 4
+                "requests": 1
               }
             },
             {
               "dimensions": {
-                "datetime": "2024-05-04T05:09:48Z",
-                "scriptName": "my-worker",
+                "datetime": "2024-05-05T01:00:20Z",
+                "scriptName": "otlp-forwarder-worker-prod",
                 "status": "success"
               },
               "quantiles": {
-                "cpuTimeP50": 59387,
-                "cpuTimeP99": 59387
-              },
-              "sum": {
-                "errors": 0,
-                "requests": 1,
-                "subrequests": 2
-              }
-            },
-            {
-              "dimensions": {
-                "datetime": "2024-05-04T05:14:04Z",
-                "scriptName": "my-worker",
-                "status": "clientDisconnected"
-              },
-              "quantiles": {
-                "cpuTimeP50": 11822,
-                "cpuTimeP99": 11822
+                "cpuTimeP50": 3549,
+                "cpuTimeP75": 3549,
+                "cpuTimeP99": 3549,
+                "cpuTimeP999": 3549,
+                "durationP50": 0.012762625,
+                "durationP75": 0.012762625,
+                "durationP99": 0.012762625,
+                "durationP999": 0.012762625
               },
               "sum": {
+                "duration": 0.012762625,
                 "errors": 0,
-                "requests": 1,
-                "subrequests": 2
+                "requests": 1
               }
             }
           ]
diff --git a/gql/queries.graphql b/gql/queries.graphql
index 4bbd4a5..8d57c1b 100644
--- a/gql/queries.graphql
+++ b/gql/queries.graphql
@@ -1,24 +1,31 @@
-query GetWorkersAnalyticsQuery($accountTag: string, $datetimeStart: string, $datetimeEnd: string, $scriptName: string) {
+query GetWorkersAnalyticsQuery($accountTag: string, $datetimeStart: string, $datetimeEnd: string, $limit: Int!) {
     viewer {
       accounts(filter: {accountTag: $accountTag}) {
-        workersInvocationsAdaptive(limit: 100, filter: {
-          scriptName: $scriptName,
+        workersInvocationsAdaptive(limit: $limit, filter: {
           datetime_geq: $datetimeStart,
-          datetime_leq: $datetimeEnd
+          datetime_lt: $datetimeEnd
         }) {
+          dimensions {
+            scriptName
+            status
+            datetime
+          }
+
           sum {
-            subrequests
             requests
             errors
+            duration
           }
+
           quantiles {
             cpuTimeP50
+            cpuTimeP75
             cpuTimeP99
-          }
-          dimensions{
-            datetime
-            scriptName
-            status
+            cpuTimeP999
+            durationP50
+            durationP75
+            durationP99
+            durationP999
           }
         }
       }
diff --git a/src/gql.rs b/src/gql.rs
index 339df5b..69ae752 100644
--- a/src/gql.rs
+++ b/src/gql.rs
@@ -1,12 +1,10 @@
-use std::borrow::Cow;
 use std::error::Error;
-use std::sync::{Arc, Mutex};
 use graphql_client::{GraphQLQuery, Response};
-use opentelemetry::KeyValue;
-use opentelemetry::metrics::Unit;
-use opentelemetry_sdk::AttributeSet;
-use opentelemetry_sdk::metrics::data::{DataPoint, Metric};
-use opentelemetry_sdk::metrics::data::Gauge;
+use opentelemetry_sdk::metrics::data::Metric;
+use prometheus::{CounterVec, GaugeVec, Opts, Registry};
+use crate::metrics::prometheus_registry_to_opentelemetry_metrics;
+use web_time::SystemTime;
+use chrono::NaiveDateTime;
 
 // The paths are relative to the directory where your `Cargo.toml` is located.
 // Both json and the GraphQL schema language are supported as sources for the schema
@@ -30,8 +28,10 @@ type Time = String;
 #[allow(non_camel_case_types)]
 type uint64 = u64;
 
+#[allow(non_camel_case_types)]
+type float64 = f64;
+
 pub async fn perform_my_query(cloudflare_api_url: String, cloudflare_api_key: String, variables: get_workers_analytics_query::Variables) -> Result<Vec<Metric>, Box<dyn Error>> {
-    let metrics = Arc::new(Mutex::new(Vec::new()));
     let request_body = GetWorkersAnalyticsQuery::build_query(variables);
     let client = reqwest::Client::new();
     let res = client.post(cloudflare_api_url)
@@ -41,40 +41,58 @@ pub async fn perform_my_query(cloudflare_api_url: String, cloudflare_api_key: St
         return Err(Box::new(res.error_for_status().unwrap_err()));
     }
     let response_body: Response<get_workers_analytics_query::ResponseData> = res.json().await?;
-
     let response_data: get_workers_analytics_query::ResponseData = response_body.data.expect("missing response data");
+
+    let registry = Registry::new();
+    let worker_requests_opts = Opts::new("cloudflare_worker_requests", "number of requests to the worker");
+    let worker_requests = CounterVec::new(worker_requests_opts, &["script_name"]).unwrap();
+    registry.register(Box::new(worker_requests.clone())).unwrap();
+
+    let worker_errors_opts = Opts::new("cloudflare_worker_errors", "number of failed requests to the worker");
+    let worker_errors = CounterVec::new(worker_errors_opts, &["script_name"]).unwrap();
+    registry.register(Box::new(worker_errors.clone())).unwrap();
+
+    let worker_cpu_time_opts = Opts::new("cloudflare_worker_cpu_time", "cpu time processing request");
+    let worker_cpu_time = GaugeVec::new(worker_cpu_time_opts, &["script_name", "quantile"]).unwrap();
+    registry.register(Box::new(worker_cpu_time.clone())).unwrap();
+
+    let worker_duration_opts = Opts::new("cloudflare_worker_duration", "wall clock time processing request");
+    let worker_duration = GaugeVec::new(worker_duration_opts, &["script_name", "quantile"]).unwrap();
+    registry.register(Box::new(worker_duration.clone())).unwrap();
+
+    let mut last_datetime: Option<Time> = None;
     for account in response_data.clone().viewer.unwrap().accounts.iter() {
         for worker in account.workers_invocations_adaptive.iter() {
-            // See https://github.com/lablabs/cloudflare-exporter/blob/05e80d9cc5034c5a40b08f7630e6ca5a54c66b20/prometheus.go#L44C61-L44C93
-            let requests = worker.sum.as_ref().unwrap().requests;
-            let metric = create_metric("cloudflare_worker_requests".to_string(), "A gauge of the number of requests to a worker.".to_string(), requests, "requests".to_string()).unwrap();
-            metrics.lock().unwrap().push(metric);
+            let dimensions = worker.dimensions.as_ref().unwrap();
+            last_datetime = Some(dimensions.datetime.clone());
+            let script_name = dimensions.script_name.clone();
+            let sum = worker.sum.as_ref().unwrap();
+            let quantiles = worker.quantiles.as_ref().unwrap();
+
+            worker_requests.with_label_values(&[script_name.as_str()]).inc_by(sum.requests as f64);
+            worker_errors.with_label_values(&[script_name.as_str()]).inc_by(sum.errors as f64);
+            worker_cpu_time.with_label_values(&[script_name.as_str(), "P50"]).set(quantiles.cpu_time_p50 as f64);
+            worker_cpu_time.with_label_values(&[script_name.as_str(), "P75"]).set(quantiles.cpu_time_p75 as f64);
+            worker_cpu_time.with_label_values(&[script_name.as_str(), "P99"]).set(quantiles.cpu_time_p99 as f64);
+            worker_cpu_time.with_label_values(&[script_name.as_str(), "P999"]).set(quantiles.cpu_time_p999 as f64);
+            worker_duration.with_label_values(&[script_name.as_str(), "P50"]).set(quantiles.duration_p50 as f64);
+            worker_duration.with_label_values(&[script_name.as_str(), "P75"]).set(quantiles.duration_p75 as f64);
+            worker_duration.with_label_values(&[script_name.as_str(), "P99"]).set(quantiles.duration_p99 as f64);
+            worker_duration.with_label_values(&[script_name.as_str(), "P999"]).set(quantiles.duration_p999 as f64);
         }
     }
 
-    let mut vec = metrics.lock().unwrap();
-    let mut metrics_to_return: Vec<Metric> = Vec::new();
-    metrics_to_return.extend(vec.drain(..));
-    Ok(metrics_to_return)
+    let timestamp: std::time::SystemTime = last_datetime.map(|datetime| {
+        let datetime: NaiveDateTime = NaiveDateTime::parse_from_str(&*datetime, "%+").unwrap();
+        datetime.and_utc().into()
+    }).unwrap_or_else(|| {
+        to_std_systemtime(SystemTime::now())
+    });
+
+    Ok(prometheus_registry_to_opentelemetry_metrics(registry, timestamp))
 }
 
-fn create_metric(name: String, description: String, value: uint64, unit:String) -> Result<Metric, Box<dyn Error>> {
-    let key_value = KeyValue::new("key", "value");
-    let attribute_set: AttributeSet = std::slice::from_ref(&key_value).into();
-    let data_point = DataPoint {
-        attributes: attribute_set,
-        start_time: None,
-        time: None,
-        value,
-        exemplars: vec![],
-    };
-    let sample: Gauge<u64> = Gauge {
-        data_points: vec![data_point],
-    };
-    Ok(Metric {
-        name: Cow::from(name),
-        description: Cow::from(description),
-        unit: Unit::new(unit),
-        data: Box::new(sample),
-    })
+fn to_std_systemtime(time: web_time::SystemTime) -> std::time::SystemTime {
+    let duration = time.duration_since(web_time::SystemTime::UNIX_EPOCH).unwrap();
+    std::time::SystemTime::UNIX_EPOCH + duration
 }
diff --git a/src/lib.rs b/src/lib.rs
index cb4dd7a..41cd142 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -6,6 +6,7 @@ use worker::wasm_bindgen::JsValue;
 use crate::gql::{get_workers_analytics_query, perform_my_query};
 
 mod gql;
+mod metrics;
 
 #[worker::send]
 pub async fn do_fetch(
@@ -25,12 +26,16 @@ async fn main(_req: Request, env: Env, _ctx: Context) -> Result<Response> {
     let metrics_url = env.var("METRICS_URL")?.to_string();
     let cloudflare_api_url = env.var("CLOUDFLARE_API_URL")?.to_string();
     let cloudflare_api_key = env.var("CLOUDFLARE_API_KEY")?.to_string();
+    let cloudflare_account_id = env.var("CLOUDFLARE_ACCOUNT_ID")?.to_string();
+
+    let end = chrono::Utc::now();
+    let start = end - chrono::Duration::minutes(1);
 
     let result = perform_my_query(cloudflare_api_url, cloudflare_api_key, get_workers_analytics_query::Variables {
-        account_tag: Some("123".to_string()),
-        datetime_start: Some("2021-01-01T00:00:00Z".to_string()),
-        datetime_end: Some("2021-01-02T00:00:00Z".to_string()),
-        script_name: None,
+        account_tag: Some(cloudflare_account_id),
+        datetime_start: Some(start.to_string()),
+        datetime_end: Some(end.to_string()),
+        limit: 9999,
     }).await;
     let cf_metrics = match result {
         Ok(metrics) => metrics,
@@ -41,9 +46,9 @@ async fn main(_req: Request, env: Env, _ctx: Context) -> Result<Response> {
     };
 
     let library = opentelemetry::InstrumentationLibrary::new(
-        "my-crate",
+        "cloudflare-otlp-exporter",
         Some(env!("CARGO_PKG_VERSION")),
-        Some("https:// opentelemetry. io/ schemas/ 1.17.0"),
+        Some("https://github.com/j-white/cloudflare-otlp-exporter/v1.0.0"),
         None,
     );
     let scope_metrics = ScopeMetrics {
diff --git a/src/metrics.rs b/src/metrics.rs
new file mode 100644
index 0000000..ba5f3e8
--- /dev/null
+++ b/src/metrics.rs
@@ -0,0 +1,70 @@
+use std::borrow::Cow;
+use std::time::SystemTime;
+use opentelemetry::KeyValue;
+use opentelemetry::metrics::Unit;
+use opentelemetry_sdk::metrics::data::{DataPoint, Metric, Temporality};
+use prometheus::proto::MetricFamily;
+use prometheus::Registry;
+
+pub fn prometheus_registry_to_opentelemetry_metrics(registry: Registry, timestamp: SystemTime) -> Vec<Metric> {
+    let mut vec = Vec::new();
+    for metric_family in registry.gather() {
+        for metric in metric_family.get_metric() {
+            vec.push(create_metric_prom(&metric_family, metric, timestamp));
+        }
+    }
+    return vec;
+}
+
+fn create_metric_prom(metric_family: &MetricFamily, metric: &prometheus::proto::Metric, timestamp: SystemTime) -> Metric {
+    // convert metric labels to key value pairs
+    let mut labels = Vec::new();
+    for label_pair in metric.get_label() {
+        let key_value = KeyValue::new(label_pair.get_name().to_owned(), label_pair.get_value().to_owned());
+        labels.push(key_value);
+    }
+
+    let otlp_metric: Metric;
+    if metric.has_gauge() {
+        let gauge = metric.get_gauge();
+        let data_point = DataPoint {
+            attributes: labels.as_slice().into(),
+            start_time: None,
+            time: Some(timestamp),
+            value: gauge.get_value(),
+            exemplars: vec![],
+        };
+        let sample: opentelemetry_sdk::metrics::data::Gauge<f64> = opentelemetry_sdk::metrics::data::Gauge {
+            data_points: vec![data_point],
+        };
+        otlp_metric = Metric {
+            name: Cow::from(metric_family.get_name().to_owned()),
+            description: Cow::from(metric_family.get_help().to_owned()),
+            unit: Unit::new(""),
+            data: Box::new(sample),
+        }
+    } else if metric.has_counter() {
+        let counter = metric.get_counter();
+        let data_point = DataPoint {
+            attributes: labels.as_slice().into(),
+            start_time: None,
+            time: Some(timestamp),
+            value: counter.get_value(),
+            exemplars: vec![],
+        };
+        let sample: opentelemetry_sdk::metrics::data::Sum<f64> = opentelemetry_sdk::metrics::data::Sum {
+            data_points: vec![data_point],
+            temporality: Temporality::Cumulative,
+            is_monotonic: true
+        };
+        otlp_metric = Metric {
+            name: Cow::from(metric_family.get_name().to_owned()),
+            description: Cow::from(metric_family.get_help().to_owned()),
+            unit: Unit::new(""),
+            data: Box::new(sample),
+        }
+    } else {
+        panic!("Unsupported metric type")
+    }
+    otlp_metric
+}
diff --git a/wrangler.toml b/wrangler.toml
index 636a991..78d54a1 100644
--- a/wrangler.toml
+++ b/wrangler.toml
@@ -17,3 +17,4 @@ build = { command = "cargo install -q worker-build && worker-build --dev" }
 METRICS_URL = "http://collector:4318/v1/metrics"
 CLOUDFLARE_API_URL = "https://api.cloudflare.com/client/v4/graphql"
 CLOUDFLARE_API_KEY = "fake"
+CLOUDFLARE_ACCOUNT_ID = "1234"