> ## Documentation Index > Fetch the complete documentation index at: https://docs.zebratruth.ai/llms.txt > Use this file to discover all available pages before exploring further. # List registered signers > Every signer registered for the workspace, including failed and revoked ones, with counts by status. The certificate chain is never returned. Not billed. ## OpenAPI ````yaml /openapi/zebratruth-v1.yaml get /media/provenance/signers openapi: 3.1.0 info: title: ZebraTruth Compliance API version: 1.0.0 description: > AI-powered compliance checking for advertising content. Check text and images against jurisdiction laws, platform policies, and rights clearance requirements. Results include embeddable annotations mapped to content locations (text spans, video timestamps, image regions). contact: name: ZebraTruth Support email: support@zebratruth.ai url: https://developers.zebratruth.ai license: name: MIT url: https://opensource.org/licenses/MIT servers: - url: https://api.zebratruth.ai/v1 description: Production security: - bearerAuth: [] tags: - name: Video Compliance description: > **Primary endpoint.** Async compliance analysis for video ads. 3-step flow: get an upload URL, upload the video bytes, submit for analysis. Poll or receive an HMAC-signed webhook with the report. Returns timestamped findings citing stable evidence IDs (`audio_NNN`, `frame_NNN`, `ocr_NNN`, `signal_NNN`). 3-180 second videos. mp4 / webm / quicktime. Built for ad agencies and creators. - name: Authentication description: Validate API keys and check account status - name: Compliance description: >- Run compliance checks on text + image content (sync). For video, use the Video Compliance endpoints above. - name: Agents description: Discover and invoke individual compliance agents - name: Jobs description: Poll async job status and view execution traces - name: Reports description: Retrieve and replay compliance reports - name: Observability description: Request logs and webhook delivery status - name: Billing description: Subscriptions, plan changes, and credit balance - name: Documents description: Extract text from PDF and Word documents before or as part of a check - name: Check History description: List and retrieve past compliance checks for the workspace - name: Provenance description: Inspect and sign Content Credentials (C2PA) on images and video - name: Corpus description: >- Review queue for proposed changes to the governed legal corpus (dashboard session) - name: Webhooks description: Saved webhook endpoints (dashboard session) and delivery logs paths: /media/provenance/signers: get: tags: - Provenance summary: List registered signers description: > Every signer registered for the workspace, including failed and revoked ones, with counts by status. The certificate chain is never returned. Not billed. operationId: listProvenanceSigners responses: '200': description: Signers content: application/json: schema: $ref: '#/components/schemas/ProvenanceSignersResponse' '401': $ref: '#/components/responses/Unauthorized' '403': $ref: '#/components/responses/ForbiddenCoded' components: schemas: ProvenanceSignersResponse: type: object properties: signers: type: array items: $ref: '#/components/schemas/ProvenanceSigner' counts: type: object properties: total: type: integer active: type: integer pending: type: integer failed: type: integer revoked: type: integer ProvenanceSigner: type: object description: A registered signer. The certificate chain itself is never returned. properties: tenantId: type: string signerId: type: string displayName: type: string legalEntity: type: string algorithm: type: string enum: - es256 - es384 - es512 - ps256 - ps384 - ps512 - ed25519 endpointUrl: type: string format: uri certificateId: type: string nullable: true status: type: string enum: - pending - active - failed - expired - revoked rejectionCode: type: string nullable: true rejectionDetail: type: string nullable: true subject: type: string issuer: type: string validFrom: type: string format: date-time validTo: type: string format: date-time fingerprintSha256: type: string createdAt: type: string format: date-time verifiedAt: type: string format: date-time nullable: true CodedError: type: object description: > Standard error envelope. `data.code` is the stable discriminator to branch on; `statusMessage` is the human-readable reason. Unless a response documents extra named fields, `data` is reduced to `{ code }` before it is sent. required: - statusCode - message properties: error: type: boolean example: true url: type: string format: uri statusCode: type: integer statusMessage: type: string message: type: string data: type: object required: - code properties: code: type: string example: review_scope_not_enabled additionalProperties: true responses: Unauthorized: description: | Invalid, missing, or expired API key. Standard error envelope — read `message` for the human-readable reason. content: application/json: schema: type: object description: Standard error envelope. required: - statusCode - message properties: error: type: boolean example: true url: type: string format: uri example: https://api.zebratruth.ai/v1/whoami statusCode: type: integer example: 401 statusMessage: type: string example: Invalid API key message: type: string description: Canonical human-readable reason — pattern-match on this field. example: Invalid API key ForbiddenCoded: description: > The credential is valid but may not perform this action. `data.code` is one of `permission_not_granted`, `principal_forbidden_control_plane` (an API key called a dashboard-only action), `membership_not_active`, `entitlement_required`, `workspace_provisioning`, `workspace_deletion_scheduled`. content: application/json: schema: $ref: '#/components/schemas/CodedError' securitySchemes: bearerAuth: type: http scheme: bearer description: | API key starting with `zt_live_` (production) or `zt_test_` (sandbox). Get your key at https://developers.zebratruth.ai ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.