diff --git a/app/controllers/simplified-account/settings/api-keys/api-keys.controller.js b/app/controllers/simplified-account/settings/api-keys/api-keys.controller.js
index f09b55ed8..433f950e7 100644
--- a/app/controllers/simplified-account/settings/api-keys/api-keys.controller.js
+++ b/app/controllers/simplified-account/settings/api-keys/api-keys.controller.js
@@ -7,11 +7,19 @@ async function get (req, res) {
   const activeKeys = await apiKeysService.getActiveKeys(req.account.id)
   return response(req, res, 'simplified-account/settings/api-keys/index', {
     accountType: req.account.type,
-    activeKeys,
-    createApiKeyLink: formatSimplifiedAccountPathsFor(paths.simplifiedAccount.settings.apiKeys.create, req.service.externalId, req.account.type),
+    activeKeys: activeKeys.map(activeKey => {
+      return {
+        ...activeKey,
+        changeNameLink: formatSimplifiedAccountPathsFor(paths.simplifiedAccount.settings.apiKeys.changeName,
+          req.service.externalId, req.account.type, activeKey.tokenLink)
+      }
+    }),
+    createApiKeyLink: formatSimplifiedAccountPathsFor(paths.simplifiedAccount.settings.apiKeys.create,
+      req.service.externalId, req.account.type),
     showRevokedKeysLink: '#'
   })
 }
 
 module.exports = { get }
 module.exports.createApiKey = require('./create/create-api-key.controller')
+module.exports.changeName = require('./change-name/change-name.controller')
diff --git a/app/controllers/simplified-account/settings/api-keys/api-keys.controller.test.js b/app/controllers/simplified-account/settings/api-keys/api-keys.controller.test.js
index ef89cb1f9..be8f379ca 100644
--- a/app/controllers/simplified-account/settings/api-keys/api-keys.controller.test.js
+++ b/app/controllers/simplified-account/settings/api-keys/api-keys.controller.test.js
@@ -5,7 +5,7 @@ const ACCOUNT_TYPE = 'live'
 const SERVICE_ID = 'service-id-123abc'
 
 const mockResponse = sinon.spy()
-const apiKeys = [{ description: 'my token', createdBy: 'system generated', issuedDate: '12 Dec 2024' }]
+const apiKeys = [{ description: 'my token', createdBy: 'system generated', issuedDate: '12 Dec 2024', tokenLink: '123-345' }]
 const apiKeysService = {
   getActiveKeys: sinon.stub().resolves(apiKeys)
 }
@@ -39,7 +39,13 @@ describe('Controller: settings/api-keys', () => {
 
     it('should pass context data to the response method', () => {
       expect(mockResponse.args[0][3]).to.have.property('accountType').to.equal('live')
-      expect(mockResponse.args[0][3]).to.have.property('activeKeys').to.deep.equal(apiKeys)
+      expect(mockResponse.args[0][3]).to.have.property('activeKeys').to.deep.equal(
+        apiKeys.map(apiKey => {
+          return {
+            ...apiKey,
+            changeNameLink: `/simplified/service/${SERVICE_ID}/account/${ACCOUNT_TYPE}/settings/api-keys/change-name/${apiKeys[0].tokenLink}`
+          }
+        }))
     })
   })
 })
diff --git a/app/controllers/simplified-account/settings/api-keys/change-name/change-name.controller.js b/app/controllers/simplified-account/settings/api-keys/change-name/change-name.controller.js
new file mode 100644
index 000000000..694c70d03
--- /dev/null
+++ b/app/controllers/simplified-account/settings/api-keys/change-name/change-name.controller.js
@@ -0,0 +1,36 @@
+const paths = require('@root/paths')
+const { validationResult } = require('express-validator')
+const formatSimplifiedAccountPathsFor = require('@utils/simplified-account/format/format-simplified-account-paths-for')
+const formatValidationErrors = require('@utils/simplified-account/format/format-validation-errors')
+const { response } = require('@utils/response')
+const { changeApiKeyName } = require('@services/api-keys.service')
+const DESCRIPTION_VALIDATION = require('@controllers/simplified-account/settings/api-keys/validations')
+
+function get (req, res) {
+  return response(req, res, 'simplified-account/settings/api-keys/api-key-name', {
+    backLink: formatSimplifiedAccountPathsFor(paths.simplifiedAccount.settings.apiKeys.index, req.service.externalId, req.account.type)
+  })
+}
+
+async function post (req, res) {
+  await Promise.all(DESCRIPTION_VALIDATION.map(validation => validation.run(req)))
+  const errors = validationResult(req)
+
+  if (!errors.isEmpty()) {
+    const formattedErrors = formatValidationErrors(errors)
+    return response(req, res, 'simplified-account/settings/api-keys/api-key-name', {
+      errors: {
+        summary: formattedErrors.errorSummary,
+        formErrors: formattedErrors.formErrors
+      },
+      backLink: formatSimplifiedAccountPathsFor(paths.simplifiedAccount.settings.apiKeys.index, req.service.externalId, req.account.type)
+    })
+  }
+
+  const tokenLink = req.params.tokenLink
+  const description = req.body.description
+  await changeApiKeyName(tokenLink, description)
+  res.redirect(formatSimplifiedAccountPathsFor(paths.simplifiedAccount.settings.apiKeys.index, req.service.externalId, req.account.type))
+}
+
+module.exports = { get, post }
diff --git a/app/controllers/simplified-account/settings/api-keys/change-name/change-name.controller.test.js b/app/controllers/simplified-account/settings/api-keys/change-name/change-name.controller.test.js
new file mode 100644
index 000000000..e8cf86353
--- /dev/null
+++ b/app/controllers/simplified-account/settings/api-keys/change-name/change-name.controller.test.js
@@ -0,0 +1,96 @@
+const ControllerTestBuilder = require('@test/test-helpers/simplified-account/controllers/ControllerTestBuilder.class')
+const sinon = require('sinon')
+const { expect } = require('chai')
+const formatSimplifiedAccountPathsFor = require('@utils/simplified-account/format/format-simplified-account-paths-for')
+const paths = require('@root/paths')
+
+const ACCOUNT_TYPE = 'live'
+const SERVICE_ID = 'service-id-123abc'
+const mockResponse = sinon.spy()
+const apiKeysService = {
+  changeApiKeyName: sinon.stub().resolves()
+}
+const {
+  req,
+  res,
+  nextRequest,
+  call
+} = new ControllerTestBuilder('@controllers/simplified-account/settings/api-keys/change-name/change-name.controller')
+  .withServiceExternalId(SERVICE_ID)
+  .withAccountType(ACCOUNT_TYPE)
+  .withStubs({
+    '@utils/response': { response: mockResponse },
+    '@services/api-keys.service': apiKeysService
+  })
+  .build()
+
+describe('Controller: settings/api-keys/change-name', () => {
+  describe('get', () => {
+    before(() => {
+      call('get')
+    })
+
+    it('should call the response method', () => {
+      expect(mockResponse).to.have.been.calledOnce // eslint-disable-line
+    })
+
+    it('should pass req, res, template path and context to the response method', () => {
+      expect(mockResponse).to.have.been.calledWith(req, res, 'simplified-account/settings/api-keys/api-key-name',
+        { backLink: formatSimplifiedAccountPathsFor(paths.simplifiedAccount.settings.apiKeys.index, SERVICE_ID, ACCOUNT_TYPE) })
+    })
+  })
+
+  describe('post', () => {
+    describe('a valid description', () => {
+      before(() => {
+        nextRequest({
+          body: {
+            description: 'a test api key'
+          },
+          params: {
+            tokenLink: '123-456-abc'
+          }
+        })
+        call('post')
+      })
+
+      it('should submit values to the api keys service', () => {
+        expect(apiKeysService.changeApiKeyName).to.have.been.calledWith('123-456-abc', 'a test api key')
+      })
+
+      it('should redirect to the api keys index page', () => {
+        expect(res.redirect.calledOnce).to.be.true // eslint-disable-line
+        expect(res.redirect.args[0][0]).to.include(
+          formatSimplifiedAccountPathsFor(paths.simplifiedAccount.settings.apiKeys.index, SERVICE_ID, ACCOUNT_TYPE)
+        )
+      })
+    })
+
+    describe('an invalid description', () => {
+      before(() => {
+        nextRequest({
+          body: {
+            description: ''
+          },
+          params: {
+            tokenLink: '123-456-abc'
+          }
+        })
+        call('post')
+      })
+
+      it('should not call apiKeysService.changeApiKeyName', () => {
+        sinon.assert.notCalled(apiKeysService.changeApiKeyName)
+      })
+
+      it('should pass req, res, template path and context to the response method', () => {
+        expect(mockResponse.calledOnce).to.be.true // eslint-disable-line
+        expect(mockResponse.args[0][2]).to.equal('simplified-account/settings/api-keys/api-key-name')
+        expect(mockResponse.args[0][3].errors.summary[0].text).to.equal('Name must not be empty')
+        expect(mockResponse.args[0][3].errors.formErrors.description).to.equal('Name must not be empty')
+        expect(mockResponse.args[0][3].backLink).to.equal(
+          formatSimplifiedAccountPathsFor(paths.simplifiedAccount.settings.apiKeys.index, SERVICE_ID, ACCOUNT_TYPE))
+      })
+    })
+  })
+})
diff --git a/app/controllers/simplified-account/settings/api-keys/create/create-api-key.controller.js b/app/controllers/simplified-account/settings/api-keys/create/create-api-key.controller.js
index ee0d1999e..06592fb1a 100644
--- a/app/controllers/simplified-account/settings/api-keys/create/create-api-key.controller.js
+++ b/app/controllers/simplified-account/settings/api-keys/create/create-api-key.controller.js
@@ -2,8 +2,9 @@ const { response } = require('@utils/response')
 const formatSimplifiedAccountPathsFor = require('@utils/simplified-account/format/format-simplified-account-paths-for')
 const paths = require('@root/paths')
 const { TOKEN_SOURCE, createApiKey } = require('@services/api-keys.service')
-const { body, validationResult } = require('express-validator')
+const { validationResult } = require('express-validator')
 const formatValidationErrors = require('@utils/simplified-account/format/format-validation-errors')
+const DESCRIPTION_VALIDATION = require('@controllers/simplified-account/settings/api-keys/validations')
 
 async function get (req, res) {
   return response(req, res, 'simplified-account/settings/api-keys/api-key-name', {
@@ -11,17 +12,8 @@ async function get (req, res) {
   })
 }
 
-const descriptionValidation = [
-  body('description')
-    .trim()
-    .notEmpty()
-    .withMessage('Name must not be empty')
-    .isLength({ max: 50 })
-    .withMessage('Name must be 50 characters or fewer')
-]
-
 async function post (req, res) {
-  await Promise.all(descriptionValidation.map(validation => validation.run(req)))
+  await Promise.all(DESCRIPTION_VALIDATION.map(validation => validation.run(req)))
   const errors = validationResult(req)
 
   if (!errors.isEmpty()) {
diff --git a/app/controllers/simplified-account/settings/api-keys/create/create-api-key.controller.test.js b/app/controllers/simplified-account/settings/api-keys/create/create-api-key.controller.test.js
index 126c8d65b..8f93bc961 100644
--- a/app/controllers/simplified-account/settings/api-keys/create/create-api-key.controller.test.js
+++ b/app/controllers/simplified-account/settings/api-keys/create/create-api-key.controller.test.js
@@ -28,7 +28,7 @@ const {
   })
   .build()
 
-describe('Controller: settings/create-api-key', () => {
+describe('Controller: settings/api-keys/create', () => {
   describe('get', () => {
     before(() => {
       call('get')
diff --git a/app/controllers/simplified-account/settings/api-keys/validations.js b/app/controllers/simplified-account/settings/api-keys/validations.js
new file mode 100644
index 000000000..578677aa0
--- /dev/null
+++ b/app/controllers/simplified-account/settings/api-keys/validations.js
@@ -0,0 +1,11 @@
+const { body } = require('express-validator')
+const DESCRIPTION_VALIDATION = [
+  body('description')
+    .trim()
+    .notEmpty()
+    .withMessage('Name must not be empty')
+    .isLength({ max: 50 })
+    .withMessage('Name must be 50 characters or fewer')
+]
+
+module.exports = DESCRIPTION_VALIDATION
diff --git a/app/models/Token.class.js b/app/models/Token.class.js
index 51e670e94..da1b4cb62 100644
--- a/app/models/Token.class.js
+++ b/app/models/Token.class.js
@@ -19,11 +19,17 @@ class Token {
     return this
   }
 
+  withTokenLink (tokenLink) {
+    this.tokenLink = tokenLink
+    return this
+  }
+
   toJson () {
     return {
       ...this.description && { description: this.description },
       ...this.createdBy && { created_by: this.createdBy },
       ...this.issuedDate && { issued_date: this.issuedDate },
+      ...this.tokenLink && { token_link: this.tokenLink },
       ...this.lastUsed && { last_used: this.lastUsed }
     }
   }
@@ -37,6 +43,7 @@ class Token {
       .withCreatedBy(data?.created_by)
       .withIssuedDate(data?.issued_date)
       .withLastUsed(data?.last_used)
+      .withTokenLink(data?.token_link)
   }
 }
 
diff --git a/app/paths.js b/app/paths.js
index d42807f04..63555849f 100644
--- a/app/paths.js
+++ b/app/paths.js
@@ -229,7 +229,8 @@ module.exports = {
       },
       apiKeys: {
         index: '/settings/api-keys',
-        create: '/settings/api-keys/create'
+        create: '/settings/api-keys/create',
+        changeName: '/settings/api-keys/change-name/:tokenLink'
       },
       webhooks: {
         index: '/settings/webhooks'
diff --git a/app/services/api-keys.service.js b/app/services/api-keys.service.js
index ebb396ab5..4e364a7fc 100644
--- a/app/services/api-keys.service.js
+++ b/app/services/api-keys.service.js
@@ -38,7 +38,17 @@ const getActiveKeys = async (gatewayAccountId) => {
   return publicAuthData.tokens.map(tokenData => Token.fromJson(tokenData))
 }
 
+/**
+ * @param {string} tokenLink
+ * @param {string} name The new name/description
+ * @return {Promise<void>}
+ */
+const changeApiKeyName = async (tokenLink, name) => {
+  await publicAuthClient.updateToken({ payload: { token_link: tokenLink, description: name } })
+}
+
 module.exports = {
+  changeApiKeyName,
   createApiKey,
   getActiveKeys,
   TOKEN_SOURCE
diff --git a/app/simplified-account-routes.js b/app/simplified-account-routes.js
index 8ee7d8e12..168907e53 100644
--- a/app/simplified-account-routes.js
+++ b/app/simplified-account-routes.js
@@ -77,6 +77,8 @@ simplifiedAccount.get(paths.simplifiedAccount.settings.cardTypes.index, permissi
 simplifiedAccount.get(paths.simplifiedAccount.settings.apiKeys.index, permission('tokens-active:read'), serviceSettingsController.apiKeys.get)
 simplifiedAccount.get(paths.simplifiedAccount.settings.apiKeys.create, permission('tokens:create'), serviceSettingsController.apiKeys.createApiKey.get)
 simplifiedAccount.post(paths.simplifiedAccount.settings.apiKeys.create, permission('tokens:create'), serviceSettingsController.apiKeys.createApiKey.post)
+simplifiedAccount.get(paths.simplifiedAccount.settings.apiKeys.changeName, permission('tokens:update'), serviceSettingsController.apiKeys.changeName.get)
+simplifiedAccount.post(paths.simplifiedAccount.settings.apiKeys.changeName, permission('tokens:update'), serviceSettingsController.apiKeys.changeName.post)
 
 // stripe details
 const stripeDetailsPath = paths.simplifiedAccount.settings.stripeDetails
diff --git a/app/views/simplified-account/settings/api-keys/api-key-name.njk b/app/views/simplified-account/settings/api-keys/api-key-name.njk
index 8b236456d..aa59db3c2 100644
--- a/app/views/simplified-account/settings/api-keys/api-key-name.njk
+++ b/app/views/simplified-account/settings/api-keys/api-key-name.njk
@@ -19,9 +19,6 @@
         maxlength: "50"
       },
       classes: "govuk-input--width-40",
-      label: {
-        text: "Add a description for the key"
-      },
       hint: {
         text: "For example, “John Smith’s API key”"
       }
diff --git a/app/views/simplified-account/settings/api-keys/index.njk b/app/views/simplified-account/settings/api-keys/index.njk
index 89b1e2c83..5c902b810 100644
--- a/app/views/simplified-account/settings/api-keys/index.njk
+++ b/app/views/simplified-account/settings/api-keys/index.njk
@@ -49,7 +49,7 @@
           actions: {
             items: [
               {
-                href: '#',
+                href: key.changeNameLink,
                 text: 'Change name'
               },
               {
diff --git a/test/cypress/integration/simplified-account/service-settings/api-keys/api-keys.cy.js b/test/cypress/integration/simplified-account/service-settings/api-keys/api-keys.cy.js
index 9ba1f3bc0..f7a6237e2 100644
--- a/test/cypress/integration/simplified-account/service-settings/api-keys/api-keys.cy.js
+++ b/test/cypress/integration/simplified-account/service-settings/api-keys/api-keys.cy.js
@@ -3,6 +3,8 @@ const ROLES = require('@test/fixtures/roles.fixtures')
 const gatewayAccountStubs = require('@test/cypress/stubs/gateway-account-stubs')
 const apiKeysStubs = require('@test/cypress/stubs/api-keys-stubs')
 const { Token } = require('@models/Token.class')
+const formatSimplifiedAccountPathsFor = require('@utils/simplified-account/format/format-simplified-account-paths-for')
+const paths = require('@root/paths')
 
 const USER_EXTERNAL_ID = 'user-123-abc'
 const SERVICE_EXTERNAL_ID = 'service-456-def'
@@ -56,13 +58,17 @@ describe('Settings - API keys', () => {
 
     describe('when there are active API keys', () => {
       const apiKeys = [
-        new Token().withCreatedBy('system generated').withDescription('description').withIssuedDate('12 Dec 2024'),
-        new Token().withCreatedBy('algae bra').withDescription('mathematical clothes').withIssuedDate('10 Dec 2024').withLastUsed('10 Dec 2024')
+        new Token().withCreatedBy('system generated').withDescription('description')
+          .withIssuedDate('12 Dec 2024').withTokenLink('token-link-1'),
+        new Token().withCreatedBy('algae bra').withDescription('mathematical clothes')
+          .withIssuedDate('10 Dec 2024').withLastUsed('10 Dec 2024').withTokenLink('token-link-2')
       ]
+
       beforeEach(() => {
         setupStubs('admin', apiKeys)
         cy.visit(`/simplified/service/${SERVICE_EXTERNAL_ID}/account/${ACCOUNT_TYPE}/settings/api-keys`)
       })
+
       it('should show appropriate buttons and text', () => {
         cy.get('#api-keys').should('have.text', 'Test API keys')
         cy.get('.service-settings-pane')
@@ -91,7 +97,8 @@ describe('Settings - API keys', () => {
                 .within(() => {
                   cy.get('a')
                     .should('contain.text', 'Change name')
-                    .and('have.attr', 'href', '#')
+                    .and('have.attr', 'href', formatSimplifiedAccountPathsFor(paths.simplifiedAccount.settings.apiKeys.changeName,
+                      SERVICE_EXTERNAL_ID, ACCOUNT_TYPE, token.tokenLink))
                 })
 
               cy.get('.govuk-summary-card__action').eq(1)
@@ -160,6 +167,43 @@ describe('Settings - API keys', () => {
         })
       })
     })
+
+    describe('re-name an api key', () => {
+      const NEW_API_KEY_NAME = 'api key description' // pragma: allowlist secret
+      const TOKEN_LINK = 'token-link-1'
+
+      const apiKeys = [
+        new Token().withCreatedBy('algae bra').withDescription('mathematical clothes')
+          .withIssuedDate('10 Dec 2024').withLastUsed('10 Dec 2024').withTokenLink(TOKEN_LINK)
+      ]
+
+      beforeEach(() => {
+        setupStubs('admin', apiKeys)
+        cy.task('setupStubs', [
+          apiKeysStubs.changeApiKeyName(TOKEN_LINK, NEW_API_KEY_NAME)
+        ])
+        cy.visit(`/simplified/service/${SERVICE_EXTERNAL_ID}/account/${ACCOUNT_TYPE}/settings/api-keys`)
+      })
+
+      it('show the API key name page', () => {
+        cy.get('.govuk-summary-card').within(() => {
+          cy.contains('h2', 'mathematical clothes').should('exist')
+          cy.contains('a', 'Change name').click()
+        })
+        cy.contains('h1', 'API key name').should('exist')
+      })
+
+      it('should re-name the api key successfully', () => {
+        cy.get('.govuk-summary-card').within(() => {
+          cy.contains('h2', 'mathematical clothes').should('exist')
+          cy.contains('a', 'Change name').click()
+        })
+        cy.get('input[id="description"]').type(NEW_API_KEY_NAME)
+        cy.contains('button', 'Continue').click()
+        cy.url().should('include', `/simplified/service/${SERVICE_EXTERNAL_ID}/account/${ACCOUNT_TYPE}/settings/api-keys`)
+        cy.contains('h1', 'Test API keys').should('exist')
+      })
+    })
   })
 
   describe('for a non-admin user', () => {
diff --git a/test/cypress/stubs/api-keys-stubs.js b/test/cypress/stubs/api-keys-stubs.js
index c7f93786d..06f21e862 100644
--- a/test/cypress/stubs/api-keys-stubs.js
+++ b/test/cypress/stubs/api-keys-stubs.js
@@ -36,7 +36,18 @@ function createApiKey (gatewayAccountId, email, description, expectedToken) {
   })
 }
 
+function changeApiKeyName (tokenLink, description) {
+  const path = '/v1/frontend/auth'
+  return stubBuilder('PUT', path, 200, {
+    request: {
+      token_link: tokenLink,
+      description
+    }
+  })
+}
+
 module.exports = {
+  changeApiKeyName,
   createApiKey,
   getApiKeysForGatewayAccount
 }