> ## Documentation Index > Fetch the complete documentation index at: https://docs.privue.ai/llms.txt > Use this file to discover all available pages before exploring further. # List a workflow's versions > List every version a workflow has published, newest first. A change to a workflow is published as its next version, and a verification runs the version it was created on until it is reset. Every verification names its version in `version`: read that version to see the journey the verification runs, and read two versions to see what changed between them. A workflow taken out of use keeps its versions, so one you can no longer create a verification on still lists them for the verifications that ran it. ## OpenAPI ````yaml /verification/api-reference/openapi.json get /workflows/{workflow_key}/versions openapi: 3.1.0 info: title: Verify with Privue description: >- Start identity-and-business verifications and read the results. There are three ways to run one, and a verification reads the same whichever it was. Every workflow declares which it is for as its `mode`, and a workflow is one of them and never more. **Hosted.** You create a verification with the user's mobile number and receive a journey URL to hand to them. They work through the steps your workflow configures, on our screens, and submit. Use this when the person being verified is reachable and holds their own documents. **Staged.** You create a verification, upload each document you hold against the step it answers, and ask for the checks to run. They take longer than a request should be held open, so you read the result from a callback or by polling. Use this when documents reach you over time, or when you want them kept on the record to download later. **Instant.** You send the whole submission in one request. The checks run before it answers, so the reply is the finished record. The documents are read as they arrive and stored nowhere. Use this when you hold everything already and want the answer in the call you made. Whichever it was, you read the whole record: every step, its state, what it collected, and why anything did not pass. An instant verification hands you that record in its reply; for the other two, poll the verification or register a callback endpoint and be told when it is submitted. Across your whole account you can list the workflows configured for you, count your verifications by status, and page through the records behind a count. Every error response has the shape `{"code": "...", "detail": "..."}`. Branch on `code`: several causes share a status, and `detail` is written for a person reading a log rather than for code. Treat a code you do not recognise as the status it arrived at. version: 0.1.0 servers: - url: https://api.verify.privue.ai description: Production security: [] tags: - name: Workflows description: >- The workflows configured for your account. Read one to see its mode, the documents it asks for, and how each step is answered over the API: the slots its documents go in and the values it takes. - name: Verifications description: >- Starting a verification, ending one, clearing one to run the same subject again, and purging one. Shared by both modes. A start answers 201 when it created the verification and 200 when the subject already had one, so a duplicate is visible from the status code alone. - name: Hosted workflows description: >- For a workflow the person being verified walks themselves. Start a verification with their mobile number, hand them the journey URL on the record, or open it for them from inside your own app with a handoff. - name: Staged workflows description: >- For a workflow you build up from documents you already hold. Upload each file against the step and slot it answers, withdraw one you got wrong, then ask for the checks to run and read the result when they have. Nobody is sent anywhere. - name: Instant workflows description: >- For a workflow answered in the request that asks it. Send the whole submission at once and read the finished record in the reply. Nothing is kept of the documents and nothing is left open to come back to. - name: Results description: >- Reading what a verification came to: one record, a page of them, counts across your account, and links to the files it holds. paths: /workflows/{workflow_key}/versions: get: tags: - Workflows summary: List a workflow's versions description: >- List every version a workflow has published, newest first. A change to a workflow is published as its next version, and a verification runs the version it was created on until it is reset. Every verification names its version in `version`: read that version to see the journey the verification runs, and read two versions to see what changed between them. A workflow taken out of use keeps its versions, so one you can no longer create a verification on still lists them for the verifications that ran it. operationId: read_workflow_versions_workflows__workflow_key__versions_get parameters: - name: workflow_key in: path required: true schema: type: string title: Workflow Key responses: '200': description: Every version the workflow has published, newest first. content: application/json: schema: $ref: '#/components/schemas/WorkflowVersionList' example: versions: - version: 3 published_at: '2026-08-10T17:45:30' - version: 2 published_at: '2026-08-04T11:20:05' - version: 1 published_at: '2026-07-14T16:02:47' '400': description: >- No workflow of yours has ever carried that key, whether or not it is still in use. The code is `workflow-not-found`. content: application/json: example: code: workflow-not-found detail: client 'acme' has no workflow 'merchant-onboarding' schema: $ref: '#/components/schemas/ErrorResponse' '401': description: |- The API key is missing, malformed, or revoked. The code is `unauthenticated`. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: code: unauthenticated detail: Missing or malformed Authorization header '403': description: >- The workflow belongs to the other environment. An API key is for `uat` or for `production` and reaches only that environment's workflows. Or the key is valid but not enrolled for verifications, or not set up for exactly one of `uat` and `production`, in which case ask us to reissue it. The code is one of `environment-mismatch` or `client-not-enrolled`. content: application/json: example: code: environment-mismatch detail: >- workflow 'merchant-onboarding' is production and this request is for uat schema: $ref: '#/components/schemas/ErrorResponse' '422': description: |- An identifier in the path is not in the shape it takes. The code is `request-invalid`. content: application/json: example: code: request-invalid detail: >- verification_id: Input should be a valid UUID, invalid character: found `n` at 1 schema: $ref: '#/components/schemas/ErrorResponse' '429': description: |- The API key is rate limited. Retry after a pause. The code is `rate-limited`. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: code: rate-limited detail: 'Unauthorized: RATE_LIMITED' '503': description: |- API keys could not be checked right now. Retry. The code is `auth-unavailable`. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: code: auth-unavailable detail: Auth provider unavailable security: - HTTPBearer: [] components: schemas: WorkflowVersionList: properties: versions: items: $ref: '#/components/schemas/WorkflowVersionEntry' type: array title: Versions description: Newest first, so the first entry is the latest version. type: object required: - versions title: WorkflowVersionList description: Every version a workflow has published. ErrorResponse: properties: code: $ref: '#/components/schemas/ErrorCode' description: >- What went wrong. Branch on this rather than on the status code, which several causes share, and never on `detail`. Treat a code you do not recognise as the status it arrived at: codes are added as new causes become reachable, and an existing one never changes meaning. detail: type: string title: Detail description: >- What went wrong, in words, naming the workflow, verification, step or field at fault where one is. Written for a person reading a log rather than for code to read, so it is not stable and nothing should be matched against it. type: object required: - code - detail title: ErrorResponse description: The envelope every failure is answered in. WorkflowVersionEntry: properties: version: type: integer minimum: 1 title: Version description: >- The version's number. Versions are numbered from 1, and the highest is the latest: the one a verification created now runs. published_at: type: string format: date-time title: Published At description: When this version was published. type: object required: - version - published_at title: WorkflowVersionEntry description: One version of a workflow, as the list of its versions names it. ErrorCode: type: string enum: - unauthenticated - client-not-enrolled - rate-limited - auth-unavailable - environment-mismatch - request-invalid - body-unreadable - page-cursor-invalid - window-invalid - request-too-large - not-found - method-not-allowed - internal-error - workflow-not-found - workflow-version-not-found - workflow-not-runnable - workflow-not-walkable - workflow-misconfigured - context-incomplete - context-value-invalid - mobile-required - journey-fields-refused - return-url-not-allowed - reference-taken - verification-not-found - verification-not-open - verification-expired - run-in-progress - credits-exhausted - resets-exhausted - live-limit-reached - step-not-found - step-not-ready - step-invalid - document-not-found - document-not-stored - document-too-large - document-type-not-allowed title: ErrorCode description: >- What went wrong, as a value to branch on. Published vocabulary, stated here rather than shared with any other product of ours: these are read by integrations we do not control, so a name here means what it says for as long as the endpoint answering it exists. One code names one cause, so a status carrying several causes is told apart by the code and never by the message. Codes are added as new causes become reachable; an integration therefore treats an unrecognised code as the status it arrived at. securitySchemes: HTTPBearer: type: http scheme: bearer ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.