> ## Documentation Index > Fetch the complete documentation index at: https://docs.withampersand.com/llms.txt > Use this file to discover all available pages before exploring further. # Generate OAuth authorization URL for existing connection > Generate a URL for the browser to render to kick off an OAuth flow that updates an existing connection. Use this when the connection's credentials need to be refreshed. To start an OAuth flow without specifying a connection ID, use the [/oauth-connect endpoint](https://docs.withampersand.com/reference/oauth/generate-oauth-authorization-url) instead. ## OpenAPI ````yaml platform patch /projects/{projectIdOrName}/connections/{connectionId}:oauth-update openapi: 3.0.1 info: title: Ampersand public API version: 1.0.0 servers: - url: https://api.withampersand.com/v1 security: - APIKeyHeader: [] - Bearer: [] paths: /projects/{projectIdOrName}/connections/{connectionId}:oauth-update: patch: tags: - OAuth summary: Generate OAuth authorization URL for existing connection description: > Generate a URL for the browser to render to kick off an OAuth flow that updates an existing connection. Use this when the connection's credentials need to be refreshed. To start an OAuth flow without specifying a connection ID, use the [/oauth-connect endpoint](https://docs.withampersand.com/reference/oauth/generate-oauth-authorization-url) instead. operationId: oauthUpdate parameters: - name: projectIdOrName in: path required: true schema: type: string description: Ampersand project ID or name. - name: connectionId in: path required: true schema: type: string description: The ID of the connection to update. responses: '200': description: URL to initiate OAuth flow content: text/plain: schema: type: string example: >- https://login.salesforce.com/services/oauth2/authorize?client_id=xxx&redirect_uri=https%3A%2F%2Fapi.withampersand.com%2Fcallbacks%2Fv1%2Foauth&state=xxx '400': description: Bad Request content: application/problem+json: schema: title: Input Validation Problem type: object allOf: - title: API Problem type: object allOf: - title: Problem description: > A Problem Details object (RFC 9457). Additional properties specific to the problem type may be present. type: object properties: type: type: string format: uri description: An absolute URI that identifies the problem type default: about:blank href: type: string format: uri description: >- An absolute URI that, when dereferenced, provides human-readable documentation for the problem type (e.g. using HTML). title: type: string description: >- A short summary of the problem type. Written in English and readable for engineers (usually not suited for non technical stakeholders and not localized). example: Service Unavailable status: type: integer format: int32 description: >- The HTTP status code generated by the origin server for this occurrence of the problem. minimum: 400 maximum: 600 exclusiveMaximum: true example: 503 detail: type: string description: >- A human-readable explanation specific to this occurrence of the problem instance: type: string format: uri description: >- An absolute URI that identifies the specific occurrence of the problem. It may or may not yield further information if dereferenced. example: type: urn:problem-type:exampleOrganization:exampleProblem href: >- https://www.belgif.be/specification/rest/api-guide/#standardized-problem-types title: Description of the type of problem that occurred status: 400 detail: Description of specific occurrence of the problem instance: urn:uuid:123e4567-e89b-12d3-a456-426614174000 properties: subsystem: type: string description: The subsystem that generated the problem example: api time: type: string format: date-time description: The time the problem occurred, formatted as RFC-3339 example: '2024-04-22T18:55:28.456076Z' requestId: type: string description: >- A unique identifier for the request, useful for debugging example: 89eb1ffb-2a54-4105-aaae-7bf990f1aa69#87715 causes: type: array items: type: string description: >- A brief description of something which caused the problem example: database connection failed example: - database connection failed - database query failed - unable to fetch user description: > A list of problems that caused this problem. This can be used to represent multiple root causes. There is no guaranteed ordering of the causes. remedy: type: string description: A brief description of how to resolve the problem example: Shorten your input to be under 100 characters supportEmail: type: string format: email description: An email address to contact for support example: support@withampersand.com supportPhone: type: string description: A phone number to contact for support example: +1-555-555-5555 supportUrl: type: string format: uri description: A URL to contact for support example: https://withampersand.com/support retryable: type: boolean description: Whether the request can be retried example: false retryAfter: type: string format: date-time description: >- A timestamp after which the request can be retried, formatted as RFC-3339 example: '2024-04-22T18:55:28.456076Z' context: type: object description: Additional context for the problem additionalProperties: true example: name: Rick Sanchez properties: issues: type: array items: title: Input Validation Issue type: object description: | An issue detected during input validation. allOf: - title: API Problem type: object allOf: - title: Problem description: > A Problem Details object (RFC 9457). Additional properties specific to the problem type may be present. type: object properties: type: type: string format: uri description: >- An absolute URI that identifies the problem type default: about:blank href: type: string format: uri description: >- An absolute URI that, when dereferenced, provides human-readable documentation for the problem type (e.g. using HTML). title: type: string description: >- A short summary of the problem type. Written in English and readable for engineers (usually not suited for non technical stakeholders and not localized). example: Service Unavailable status: type: integer format: int32 description: >- The HTTP status code generated by the origin server for this occurrence of the problem. minimum: 400 maximum: 600 exclusiveMaximum: true example: 503 detail: type: string description: >- A human-readable explanation specific to this occurrence of the problem instance: type: string format: uri description: >- An absolute URI that identifies the specific occurrence of the problem. It may or may not yield further information if dereferenced. example: type: >- urn:problem-type:exampleOrganization:exampleProblem href: >- https://www.belgif.be/specification/rest/api-guide/#standardized-problem-types title: >- Description of the type of problem that occurred status: 400 detail: >- Description of specific occurrence of the problem instance: urn:uuid:123e4567-e89b-12d3-a456-426614174000 properties: subsystem: type: string description: The subsystem that generated the problem example: api time: type: string format: date-time description: >- The time the problem occurred, formatted as RFC-3339 example: '2024-04-22T18:55:28.456076Z' requestId: type: string description: >- A unique identifier for the request, useful for debugging example: 89eb1ffb-2a54-4105-aaae-7bf990f1aa69#87715 causes: type: array items: type: string description: >- A brief description of something which caused the problem example: database connection failed example: - database connection failed - database query failed - unable to fetch user description: > A list of problems that caused this problem. This can be used to represent multiple root causes. There is no guaranteed ordering of the causes. remedy: type: string description: >- A brief description of how to resolve the problem example: Shorten your input to be under 100 characters supportEmail: type: string format: email description: An email address to contact for support example: support@withampersand.com supportPhone: type: string description: A phone number to contact for support example: +1-555-555-5555 supportUrl: type: string format: uri description: A URL to contact for support example: https://withampersand.com/support retryable: type: boolean description: Whether the request can be retried example: false retryAfter: type: string format: date-time description: >- A timestamp after which the request can be retried, formatted as RFC-3339 example: '2024-04-22T18:55:28.456076Z' context: type: object description: Additional context for the problem additionalProperties: true example: name: Rick Sanchez properties: in: type: string description: The location of the invalid input enum: - body - header - path - query name: type: string description: The name of the invalid input value: description: The value of the erroneous input example: type: about:blank title: Bad Request status: 400 detail: The input message is incorrect instance: 123456-1234-1235-4567489798 issues: - type: about:blank detail: exampleNumericProperty should be numeric in: path name: exampleNumericProperty value: abc - type: about:blank title: Input isn't valid with respect to schema detail: >- examplePropertyWithPattern a2345678901 doesn't match pattern '^\d{11}$' in: body name: items[0].examplePropertyWithPattern value: a2345678901 default: description: Error content: application/problem+json: schema: title: API Problem type: object allOf: - title: Problem description: > A Problem Details object (RFC 9457). Additional properties specific to the problem type may be present. type: object properties: type: type: string format: uri description: An absolute URI that identifies the problem type default: about:blank href: type: string format: uri description: >- An absolute URI that, when dereferenced, provides human-readable documentation for the problem type (e.g. using HTML). title: type: string description: >- A short summary of the problem type. Written in English and readable for engineers (usually not suited for non technical stakeholders and not localized). example: Service Unavailable status: type: integer format: int32 description: >- The HTTP status code generated by the origin server for this occurrence of the problem. minimum: 400 maximum: 600 exclusiveMaximum: true example: 503 detail: type: string description: >- A human-readable explanation specific to this occurrence of the problem instance: type: string format: uri description: >- An absolute URI that identifies the specific occurrence of the problem. It may or may not yield further information if dereferenced. example: type: urn:problem-type:exampleOrganization:exampleProblem href: >- https://www.belgif.be/specification/rest/api-guide/#standardized-problem-types title: Description of the type of problem that occurred status: 400 detail: Description of specific occurrence of the problem instance: urn:uuid:123e4567-e89b-12d3-a456-426614174000 properties: subsystem: type: string description: The subsystem that generated the problem example: api time: type: string format: date-time description: The time the problem occurred, formatted as RFC-3339 example: '2024-04-22T18:55:28.456076Z' requestId: type: string description: A unique identifier for the request, useful for debugging example: 89eb1ffb-2a54-4105-aaae-7bf990f1aa69#87715 causes: type: array items: type: string description: >- A brief description of something which caused the problem example: database connection failed example: - database connection failed - database query failed - unable to fetch user description: > A list of problems that caused this problem. This can be used to represent multiple root causes. There is no guaranteed ordering of the causes. remedy: type: string description: A brief description of how to resolve the problem example: Shorten your input to be under 100 characters supportEmail: type: string format: email description: An email address to contact for support example: support@withampersand.com supportPhone: type: string description: A phone number to contact for support example: +1-555-555-5555 supportUrl: type: string format: uri description: A URL to contact for support example: https://withampersand.com/support retryable: type: boolean description: Whether the request can be retried example: false retryAfter: type: string format: date-time description: >- A timestamp after which the request can be retried, formatted as RFC-3339 example: '2024-04-22T18:55:28.456076Z' context: type: object description: Additional context for the problem additionalProperties: true example: name: Rick Sanchez components: securitySchemes: APIKeyHeader: type: apiKey name: X-Api-Key in: header Bearer: type: http scheme: bearer bearerFormat: JWT ````