diff --git a/config.example.yaml b/config.example.yaml
index 9b5b5a6b3..373296861 100644
--- a/config.example.yaml
+++ b/config.example.yaml
@@ -79,6 +79,10 @@ _nodes:
   apis:
     - arc_url: https://arc.gorillapool.io
       token:
+  use_fee_quotes: true
+  fee_unit:
+    satoshis: 1
+    bytes: 1000
 # Prefixed with "_", because it's unused by default
 _notifications:
   enabled: false
diff --git a/config/config.go b/config/config.go
index c14d7ba92..a2d9aea45 100644
--- a/config/config.go
+++ b/config/config.go
@@ -148,9 +148,16 @@ type NewRelicConfig struct {
 
 // NodesConfig consists of blockchain nodes (such as Minercraft and Arc) configuration
 type NodesConfig struct {
-	Protocol NodesProtocol `json:"protocol" mapstructure:"protocol"`
-	Apis     []*MinerAPI   `json:"apis" mapstructure:"apis"`
-	Mapi     *MapiConfig   `json:"mapi" mapstructure:"mapi"`
+	Protocol     NodesProtocol  `json:"protocol" mapstructure:"protocol"`
+	Apis         []*MinerAPI    `json:"apis" mapstructure:"apis"`
+	UseFeeQuotes bool           `json:"use_fee_quotes" mapstructure:"use_fee_quotes"`
+	FeeUnit      *FeeUnitConfig `json:"fee_unit" mapstructure:"fee_unit"`
+}
+
+// FeeUnitConfig reflects the utils.FeeUnit struct with proper annotations for json and mapstructure
+type FeeUnitConfig struct {
+	Satoshis int `json:"satoshis" mapstructure:"satoshis"`
+	Bytes    int `json:"bytes" mapstructure:"bytes"`
 }
 
 // MinerAPI holds connection info for a single miner endpoint
@@ -163,11 +170,6 @@ type MinerAPI struct {
 	MinerID string `json:"minerid" mapstructure:"minerid"`
 }
 
-// MapiConfig holds mApi-specific configuration
-type MapiConfig struct {
-	UseFeeQuotes bool `json:"use_fee_quotes" mapstructure:"use_fee_quotes"`
-}
-
 // NotificationsConfig is the configuration for notifications
 type NotificationsConfig struct {
 	// Enabled is the flag that enables notifications service.
diff --git a/config/defaults.go b/config/defaults.go
index d4a99d123..2f97cb927 100644
--- a/config/defaults.go
+++ b/config/defaults.go
@@ -124,9 +124,7 @@ func getNodesDefaults() *NodesConfig {
 				MinerID: "03ad780153c47df915b3d2e23af727c68facaca4facd5f155bf5018b979b9aeb83",
 			},
 		},
-		Mapi: &MapiConfig{
-			UseFeeQuotes: true,
-		},
+		UseFeeQuotes: true,
 	}
 }
 
diff --git a/config/services.go b/config/services.go
index 860c8c2a2..bacc8260b 100644
--- a/config/services.go
+++ b/config/services.go
@@ -191,6 +191,15 @@ func (s *AppServices) loadBux(ctx context.Context, appConfig *AppConfig, testMod
 		options = loadBroadcastClientArc(appConfig, options, logger)
 	}
 
+	options = append(options, bux.WithFeeQuotes(appConfig.Nodes.UseFeeQuotes))
+
+	if appConfig.Nodes.FeeUnit != nil {
+		options = append(options, bux.WithFeeUnit(&utils.FeeUnit{
+			Satoshis: appConfig.Nodes.FeeUnit.Satoshis,
+			Bytes:    appConfig.Nodes.FeeUnit.Bytes,
+		}))
+	}
+
 	// Create the new client
 	s.Bux, err = bux.NewClient(ctx, options...)
 
@@ -388,8 +397,5 @@ func loadMinercraftMapi(appConfig *AppConfig, options []bux.ClientOps) []bux.Cli
 		bux.WithMAPI(),
 		bux.WithMinercraftAPIs(appConfig.Nodes.toMinercraftMapi()),
 	)
-	if appConfig.Nodes.Mapi != nil && appConfig.Nodes.Mapi.UseFeeQuotes {
-		options = append(options, bux.WithMinercraftFeeQuotes())
-	}
 	return options
 }
diff --git a/config/validate.go b/config/validate.go
index 3a91deb1b..cb4af6231 100644
--- a/config/validate.go
+++ b/config/validate.go
@@ -28,5 +28,9 @@ func (a *AppConfig) Validate() error {
 		return err
 	}
 
+	if err = a.Nodes.Validate(); err != nil {
+		return err
+	}
+
 	return nil
 }
diff --git a/config/validate_nodes.go b/config/validate_nodes.go
index 3884f9ad3..1182c1078 100644
--- a/config/validate_nodes.go
+++ b/config/validate_nodes.go
@@ -20,25 +20,55 @@ func (n *NodesConfig) Validate() error {
 		return errors.New("no miner apis configured")
 	}
 
-	// check if at least one mapi url is configured
 	if n.Protocol == NodesProtocolMapi {
-		found := slices.IndexFunc(n.Apis, func(el *MinerAPI) bool {
-			return el.MapiURL != ""
+		// check if at least one mapi url is configured
+		anyMapiNode := slices.IndexFunc(n.Apis, func(el *MinerAPI) bool {
+			return isMapiNode(el)
 		})
-		if found == -1 {
+		if anyMapiNode == -1 {
 			return errors.New("no mapi urls configured")
 		}
+
+		wrongMapiNode := slices.IndexFunc(n.Apis, func(el *MinerAPI) bool {
+			return isMapiNode(el) && el.MinerID == ""
+		})
+		if wrongMapiNode != -1 {
+			return errors.New("mapi url configured without miner id")
+		}
+
+		// check if MinerIDs for mAPI nodes are unique
+		ids := make(map[string]bool)
+		for _, el := range n.Apis {
+			if isMapiNode(el) {
+				if _, ok := ids[el.MinerID]; ok {
+					return errors.New("miner ids are not unique")
+				}
+				ids[el.MinerID] = true
+			}
+		}
 	}
 
 	// check if at least one arc url is configured
 	if n.Protocol == NodesProtocolArc {
 		found := slices.IndexFunc(n.Apis, func(el *MinerAPI) bool {
-			return el.ArcURL != ""
+			return isArcNode(el)
 		})
 		if found == -1 {
 			return errors.New("no arc urls configured")
 		}
 	}
 
+	if !n.UseFeeQuotes && n.FeeUnit == nil {
+		return errors.New("fee unit is not configured, define nodes.fee_unit or set nodes.use_fee_quotes")
+	}
+
 	return nil
 }
+
+func isMapiNode(node *MinerAPI) bool {
+	return node.MapiURL != ""
+}
+
+func isArcNode(node *MinerAPI) bool {
+	return node.ArcURL != ""
+}
diff --git a/config/validate_nodes_test.go b/config/validate_nodes_test.go
index 151777e98..ae2e37066 100644
--- a/config/validate_nodes_test.go
+++ b/config/validate_nodes_test.go
@@ -57,4 +57,27 @@ func TestNodesConfig_Validate(t *testing.T) {
 		n.Apis[0].ArcURL = ""
 		assert.Error(t, n.Validate())
 	})
+
+	t.Run("mapi url without miner id", func(t *testing.T) {
+		n := getNodesDefaults()
+
+		n.Protocol = NodesProtocolMapi
+		n.Apis[0].MapiURL = "http://localhost"
+		n.Apis[0].MinerID = ""
+		assert.Error(t, n.Validate())
+	})
+
+	t.Run("mapi url with the same miner id", func(t *testing.T) {
+		n := getNodesDefaults()
+
+		n.Protocol = NodesProtocolMapi
+		n.Apis[0].MapiURL = "http://localhost"
+		n.Apis[0].MinerID = "miner1"
+		n.Apis = append(n.Apis, &MinerAPI{
+			MapiURL: "http://localhost",
+			MinerID: "miner1",
+		})
+
+		assert.Error(t, n.Validate())
+	})
 }
diff --git a/go.mod b/go.mod
index 1e09ab05e..37cdf03fe 100644
--- a/go.mod
+++ b/go.mod
@@ -4,9 +4,9 @@ go 1.21.5
 
 require (
 	github.com/99designs/gqlgen v0.17.42
-	github.com/BuxOrg/bux v0.12.0
+	github.com/BuxOrg/bux v0.13.0
 	github.com/BuxOrg/bux-models v0.3.0
-	github.com/bitcoin-sv/go-broadcast-client v0.15.0
+	github.com/bitcoin-sv/go-broadcast-client v0.16.0
 	github.com/go-ozzo/ozzo-validation v3.6.0+incompatible
 	github.com/go-redis/redis/v8 v8.11.5
 	github.com/gofrs/uuid v4.4.0+incompatible
diff --git a/go.sum b/go.sum
index c89750fdb..7d89cb6b8 100644
--- a/go.sum
+++ b/go.sum
@@ -1,7 +1,7 @@
 github.com/99designs/gqlgen v0.17.42 h1:BVWDOb2VVHQC5k3m6oa0XhDnxltLLrU4so7x/u39Zu4=
 github.com/99designs/gqlgen v0.17.42/go.mod h1:GQ6SyMhwFbgHR0a8r2Wn8fYgEwPxxmndLFPhU63+cJE=
-github.com/BuxOrg/bux v0.12.0 h1:4gzQXTJn2GL141AWDrfTB7KLbK5IiXCsLQBNpQgh9K4=
-github.com/BuxOrg/bux v0.12.0/go.mod h1:qqsUfSVqp3IJv5NajpoMcHiAouw+40IX7sBBCclhJvo=
+github.com/BuxOrg/bux v0.13.0 h1:ph5JqTJjztOFbC4JPNAW+4KN8w+PXekzK+8ij/2yXEo=
+github.com/BuxOrg/bux v0.13.0/go.mod h1:qqsUfSVqp3IJv5NajpoMcHiAouw+40IX7sBBCclhJvo=
 github.com/BuxOrg/bux-models v0.3.0 h1:+pvpDdYaiIgeOhAO847RK07Vzc+vuUvy2ok/xJevQyg=
 github.com/BuxOrg/bux-models v0.3.0/go.mod h1:JCpoXxVnKZmCy3rg6nOtLQL5AXh6iEo2tBvcD/qAxEY=
 github.com/DATA-DOG/go-sqlmock v1.5.1 h1:FK6RCIUSfmbnI/imIICmboyQBkOckutaa6R5YYlLZyo=
@@ -30,8 +30,8 @@ github.com/asaskevich/govalidator v0.0.0-20230301143203-a9d515a09cc2 h1:DklsrG3d
 github.com/asaskevich/govalidator v0.0.0-20230301143203-a9d515a09cc2/go.mod h1:WaHUgvxTVq04UNunO+XhnAqY/wQc+bxr74GqbsZ/Jqw=
 github.com/aws/aws-sdk-go v1.43.45 h1:2708Bj4uV+ym62MOtBnErm/CDX61C4mFe9V2gXy1caE=
 github.com/aws/aws-sdk-go v1.43.45/go.mod h1:y4AeaBuwd2Lk+GepC1E9v0qOiTws0MIWAX4oIKwKHZo=
-github.com/bitcoin-sv/go-broadcast-client v0.15.0 h1:e6L/fMFf1zLy06gjtOJMA79ao1L8sMmVYnSwgvNs37U=
-github.com/bitcoin-sv/go-broadcast-client v0.15.0/go.mod h1:Hk17oGEO1ocw9Glp7/OooqjKbHF2FdfbkuTUBzOjjBI=
+github.com/bitcoin-sv/go-broadcast-client v0.16.0 h1:KadOLv+i9Y6xAOkHsSl2PIECQ59SpUyYurY6Ysvpz5A=
+github.com/bitcoin-sv/go-broadcast-client v0.16.0/go.mod h1:GRAliwumNBjEbLRIEkXqIKJpsgmMfjvlIDqgyw/NoJE=
 github.com/bitcoin-sv/go-paymail v0.11.0 h1:jEfBLLaUUIxN3WnkU9d6Wj9IUen1Xx09dWUHlz3gTnQ=
 github.com/bitcoin-sv/go-paymail v0.11.0/go.mod h1:wH4jOVM24y7+OS2rLeJpwzJ73abM2rq/aeKZom0lHSk=
 github.com/bitcoinschema/go-bitcoin/v2 v2.0.5 h1:Sgh5Eb746Zck/46rFDrZZEXZWyO53fMuWYhNoZa1tck=