> ## Documentation Index > Fetch the complete documentation index at: https://developers.gonitro.com/docs/llms.txt > Use this file to discover all available pages before exploring further. # List Participant Signing URLs by Envelope ID > The **List Participant Signing URLs by Envelope ID** endpoint returns the URL and its expiry for each participant of an envelope, for every role. Signers receive a URL into the signing experience; CC participants receive a read-only view URL. This endpoint is for senders who distribute the links themselves, so it requires the envelope to have `notificationsManagedBy` set to `sender`. When Nitro manages the notifications it has already emailed every participant their own link, and the request is rejected with a 409 response. Envelopes default to `nitro` when created without the field. Note that a sender-managed envelope can only be sent for signing when every signer authenticates by SMS, so in practice this endpoint serves envelopes that meet that requirement too. The envelope must also be in the SENT status; otherwise the request is rejected with a 409 response. ## OpenAPI ````yaml https://api.gonitro.dev/openapi.json get /sign/envelopes/{envelopeID}/participants/signing-urls openapi: 3.1.0 info: title: Nitro Sign Public API description: REST API for Nitro Sign version: '0.1' servers: - url: https://api.gonitro.dev description: Europe - url: https://api.us.gonitro.dev description: North America - url: https://api.au.gonitro.dev description: Australia security: - bearerAuth: [] paths: /sign/envelopes/{envelopeID}/participants/signing-urls: get: tags: - Sign summary: List Participant Signing URLs by Envelope ID description: > The **List Participant Signing URLs by Envelope ID** endpoint returns the URL and its expiry for each participant of an envelope, for every role. Signers receive a URL into the signing experience; CC participants receive a read-only view URL. This endpoint is for senders who distribute the links themselves, so it requires the envelope to have `notificationsManagedBy` set to `sender`. When Nitro manages the notifications it has already emailed every participant their own link, and the request is rejected with a 409 response. Envelopes default to `nitro` when created without the field. Note that a sender-managed envelope can only be sent for signing when every signer authenticates by SMS, so in practice this endpoint serves envelopes that meet that requirement too. The envelope must also be in the SENT status; otherwise the request is rejected with a 409 response. operationId: listParticipantSigningUrls parameters: - name: envelopeID in: path description: >- A unique UUIDv4 string that identifies the envelope in the Nitro system. required: true schema: type: string format: uuid responses: '200': description: List participant signing URLs content: application/json: schema: $ref: '#/components/schemas/ParticipantSigningUrlList' '401': description: Unauthorized - Invalid or missing JWT token content: application/problem+json: schema: $ref: '#/components/schemas/UnauthorizedProblemDetail' '404': description: Envelope not found content: application/problem+json: schema: $ref: '#/components/schemas/NotFoundProblemDetail' '409': description: >- Envelope is not in the SENT status, or its notifications are managed by Nitro rather than the sender content: application/problem+json: schema: oneOf: - $ref: '#/components/schemas/EnvelopeInInvalidStateProblemDetail' - $ref: >- #/components/schemas/NotificationsNotManagedBySenderProblemDetail components: schemas: ParticipantSigningUrlList: type: object description: '#### Fields' properties: items: type: array description: An array of participant signing URLs associated with the envelope items: $ref: '#/components/schemas/ParticipantSigningUrl' total: type: integer format: int32 description: The total number of items available in the collection UnauthorizedProblemDetail: type: object description: Unauthorized error details example: type: >- https://developers.gonitro.com/docs/build-nitro/errors#401-unauthorized title: Unauthorized status: 401 detail: Missing or invalid Authorization header instance: /sign/envelopes properties: type: type: string description: A URI reference that identifies the problem type title: type: string description: A short, human-readable summary of the problem type status: type: integer format: int32 description: The HTTP status code detail: type: string description: A human-readable explanation specific to this occurrence instance: type: string description: A URI reference that identifies the specific occurrence extensions: type: object additionalProperties: {} description: Additional problem-specific properties NotFoundProblemDetail: type: object description: Not Found error details example: type: https://developers.gonitro.com/docs/build-nitro/errors#404-not-found title: Not Found status: 404 detail: Envelope with ID 'envelop-123' not found instance: /sign/envelopes/envelop-123 properties: type: type: string description: A URI reference that identifies the problem type title: type: string description: A short, human-readable summary of the problem type status: type: integer format: int32 description: The HTTP status code detail: type: string description: A human-readable explanation specific to this occurrence instance: type: string description: A URI reference that identifies the specific occurrence extensions: type: object additionalProperties: {} description: Additional problem-specific properties EnvelopeInInvalidStateProblemDetail: type: object description: Envelope in invalid state example: type: https://developers.gonitro.com/docs/build-nitro/errors#409-conflict title: Conflict status: 409 detail: Envelope in invalid state instance: /sign/envelopes/%s:send-for-signing properties: type: type: string description: A URI reference that identifies the problem type title: type: string description: A short, human-readable summary of the problem type status: type: integer format: int32 description: The HTTP status code detail: type: string description: A human-readable explanation specific to this occurrence instance: type: string description: A URI reference that identifies the specific occurrence extensions: type: object additionalProperties: {} description: Additional problem-specific properties NotificationsNotManagedBySenderProblemDetail: type: object description: Signing URLs requested for an envelope whose notifications Nitro sends example: type: https://developers.gonitro.com/docs/build-nitro/errors#409-conflict title: Conflict status: 409 detail: Signing URLs are only available when notificationsManagedBy is sender instance: /sign/envelopes/%s/participants/signing-urls properties: type: type: string description: A URI reference that identifies the problem type title: type: string description: A short, human-readable summary of the problem type status: type: integer format: int32 description: The HTTP status code detail: type: string description: A human-readable explanation specific to this occurrence instance: type: string description: A URI reference that identifies the specific occurrence extensions: type: object additionalProperties: {} description: Additional problem-specific properties ParticipantSigningUrl: type: object properties: participantID: type: string format: uuid description: The unique identifier of the participant signingUrl: type: string description: >- The URL the participant uses to access the envelope. Signers are taken to the signing experience; CC participants are taken to a read-only view. expiresAt: type: string format: date-time description: Timestamp at which the URL expires required: - participantID securitySchemes: bearerAuth: type: http scheme: bearer bearerFormat: JWT ````