> ## Documentation Index > Fetch the complete documentation index at: https://docs.chatsailer.com/llms.txt > Use this file to discover all available pages before exploring further. # Add contacts to an audience > Adds existing contacts to an audience. An audience is a list rather than a send — but a campaign configured to sync future members will pick these contacts up and message them, so treat this as reaching people rather than as bookkeeping. ## OpenAPI ````yaml /api-reference/openapi.json post /v1/audiences/{audience_id}/members openapi: 3.1.0 info: description: >- The Sailer REST API for CRM, conversations, and campaigns. **Authentication.** Send a token as `Authorization: Bearer `. A workspace token (`sk_live_...`) is created by a workspace administrator and its secret is shown once. An OAuth access token (`oat_live_...`) acts on behalf of the person who authorized it and sees only what they can see. Either way the workspace is implied by the token, so no tenant header is needed. Each token carries scopes; `GET /v1/me` lists them. **Pagination.** Collections return `{data, meta, links}`. Pass `links.next` back as `cursor` until it is `null`. Cursors are opaque and only valid for the query that produced them. **Errors.** Every non-2xx response is `{"error": {...}}` with a coarse `type`, a stable `code` and the offending `param`. Quote `error.request_id` (also the `X-Request-ID` header) when contacting support. **Retries.** Send an `Idempotency-Key` header on any write to make retrying it safe for 24 hours. **Rate limits.** Limits are per token. Every response carries `X-RateLimit-Limit`, `X-RateLimit-Remaining` and `X-RateLimit-Reset`; a `429` also carries `Retry-After`. **Custom fields.** Workspace-defined fields appear under `custom_fields`, keyed by field key. `GET /v1/fields` lists every field on a resource, built-in and custom. title: Sailer API version: 1.0.0 servers: - url: https://api.chatsailer.com security: - SailerApiToken: [] tags: - description: Token introspection and workspace capabilities. name: Meta - description: >- People you talk to. Called *leads* in older Sailer surfaces; `contact` is the current name. name: Contacts - description: Companies that contacts belong to (B2B accounts). name: Organizations - description: Opportunities moving through a pipeline. name: Deals - description: Pipelines and their stages. name: Pipelines - description: Field definitions, including custom fields. name: Fields - description: Free-text annotations on CRM records. name: Notes - description: Scheduled and logged CRM activities. name: Activities - description: Per-entity label catalogs. name: Tags - description: Members of the workspace, for assigning records. name: Users - description: Message threads with contacts, across every channel. name: Conversations - description: Outbound campaigns and their participants. name: Campaigns - description: Named contact lists campaigns draw from. name: Audiences - description: The connections you talk to contacts through. name: Channels - description: Pre-approved WhatsApp message templates. name: Templates - description: >- Keeping another system in step with a workspace: the deletion feed. Changes are read from each resource's list with `updated_since`. name: Sync - description: >- Business outcomes your systems report — a sale closed, a meeting held — that your agreement may charge a success fee on. Append-only: a refund is a reversal, never an edit. Needs the `success_events:read` / `success_events:write` scopes. name: Success Events paths: /v1/audiences/{audience_id}/members: post: tags: - Audiences summary: Add contacts to an audience description: >- Adds existing contacts to an audience. An audience is a list rather than a send — but a campaign configured to sync future members will pick these contacts up and message them, so treat this as reaching people rather than as bookkeeping. operationId: add_audience_members parameters: - in: path name: audience_id required: true schema: description: Unique identifier for an audience. examples: - aud_9f2ac41d8b7e4a51b0d3e6f7a1c2d3e4 pattern: ^aud_[0-9a-f]{32}$ title: Audience Id type: string - $ref: '#/components/parameters/IdempotencyKey' requestBody: content: application/json: schema: $ref: '#/components/schemas/EnrolContactsRequest' required: true responses: '201': content: application/json: schema: $ref: '#/components/schemas/EnrolmentResult' description: Successful Response headers: Idempotent-Replay: $ref: '#/components/headers/Idempotent-Replay' X-RateLimit-Limit: $ref: '#/components/headers/X-RateLimit-Limit' X-RateLimit-Remaining: $ref: '#/components/headers/X-RateLimit-Remaining' X-RateLimit-Reset: $ref: '#/components/headers/X-RateLimit-Reset' X-Request-ID: $ref: '#/components/headers/X-Request-ID' '400': $ref: '#/components/responses/BadRequest' '401': $ref: '#/components/responses/Unauthorized' '403': $ref: '#/components/responses/Forbidden' '404': $ref: '#/components/responses/NotFound' '409': $ref: '#/components/responses/Conflict' '422': $ref: '#/components/responses/UnprocessableContent' '429': $ref: '#/components/responses/RateLimited' '500': $ref: '#/components/responses/InternalError' security: - SailerApiToken: [] components: parameters: IdempotencyKey: description: >- A unique value (a UUID works) that makes retrying this request safe. A repeat with the same key and body within 24 hours returns the original response instead of acting twice; the same key with a different body is a `409 idempotency_key_reused`. in: header name: Idempotency-Key required: false schema: maxLength: 255 type: string schemas: EnrolContactsRequest: additionalProperties: false description: >- Body for adding contacts to a campaign or an audience. Takes ids of contacts that already exist, rather than contact details. This endpoint is not an import: creating people and messaging them should not be the same call, because the failure modes are different and only one of them is reversible. properties: contact_ids: description: Contacts to add. They must already exist in this workspace. items: description: Unique identifier for a contact. examples: - con_9f2ac41d8b7e4a51b0d3e6f7a1c2d3e4 pattern: ^con_[0-9a-f]{32}$ type: string maxItems: 1000 minItems: 1 title: Contact Ids type: array required: - contact_ids title: EnrolContactsRequest type: object EnrolmentResult: description: What an enrolment actually did. properties: added: description: Contacts newly enrolled. Excludes any already present. title: Added type: integer already_present: description: Contacts that were already in this campaign or audience. title: Already Present type: integer object: const: enrolment_result default: enrolment_result title: Object type: string required: - added - already_present title: EnrolmentResult type: object ApiErrorResponse: description: Every non-2xx response on the public API has this body. properties: error: $ref: '#/components/schemas/ApiError' required: - error title: ApiErrorResponse type: object ApiError: properties: code: description: Stable, machine-readable identifier. title: Code type: string detail: anyOf: - items: $ref: '#/components/schemas/ErrorDetail' type: array - type: 'null' default: null description: Per-field errors for validation failures. title: Detail documentation_url: anyOf: - type: string - type: 'null' default: null title: Documentation Url message: description: Human-readable explanation. title: Message type: string param: anyOf: - type: string - type: 'null' default: null description: Request field the error refers to, if any. title: Param request_id: anyOf: - type: string - type: 'null' default: null description: >- Echoes the X-Request-ID response header. Quote it in support requests. title: Request Id type: $ref: '#/components/schemas/ErrorType' required: - type - code - message title: ApiError type: object ErrorDetail: properties: code: anyOf: - type: string - type: 'null' default: null title: Code field: description: Dotted path to the offending field. title: Field type: string message: title: Message type: string required: - field - message title: ErrorDetail type: object ErrorType: description: Coarse class of failure. Stable; new codes may appear under a type. enum: - invalid_request_error - authentication_error - permission_error - not_found_error - conflict_error - rate_limit_error - api_error title: ErrorType type: string headers: Idempotent-Replay: description: >- `true` when this response is a stored replay of an earlier request with the same `Idempotency-Key`. schema: enum: - 'true' type: string X-RateLimit-Limit: description: Requests allowed in the current window on this token. schema: type: integer X-RateLimit-Remaining: description: Requests left in the current window. schema: type: integer X-RateLimit-Reset: description: Seconds until the window resets and the allowance refills. schema: type: integer X-Request-ID: description: Unique id for this request. Quote it to support. schema: type: string Retry-After: description: Seconds to wait before retrying. schema: type: integer responses: BadRequest: content: application/json: schema: $ref: '#/components/schemas/ApiErrorResponse' description: A query parameter, path segment or header is invalid. headers: X-Request-ID: $ref: '#/components/headers/X-Request-ID' Unauthorized: content: application/json: schema: $ref: '#/components/schemas/ApiErrorResponse' description: The token is missing, unknown, revoked or expired. headers: X-Request-ID: $ref: '#/components/headers/X-Request-ID' Forbidden: content: application/json: schema: $ref: '#/components/schemas/ApiErrorResponse' description: >- The token lacks a required scope, or the workspace's CRM write policy does not allow this change. headers: X-Request-ID: $ref: '#/components/headers/X-Request-ID' NotFound: content: application/json: schema: $ref: '#/components/schemas/ApiErrorResponse' description: No such record in this workspace. headers: X-Request-ID: $ref: '#/components/headers/X-Request-ID' Conflict: content: application/json: schema: $ref: '#/components/schemas/ApiErrorResponse' description: >- The request conflicts with current state, or its `Idempotency-Key` was reused with a different body or is still being processed. headers: X-Request-ID: $ref: '#/components/headers/X-Request-ID' UnprocessableContent: content: application/json: schema: $ref: '#/components/schemas/ApiErrorResponse' description: The request body failed validation. headers: X-Request-ID: $ref: '#/components/headers/X-Request-ID' RateLimited: content: application/json: schema: $ref: '#/components/schemas/ApiErrorResponse' description: Too many requests on this token. Retry after the delay. headers: Retry-After: $ref: '#/components/headers/Retry-After' X-RateLimit-Limit: $ref: '#/components/headers/X-RateLimit-Limit' X-RateLimit-Remaining: $ref: '#/components/headers/X-RateLimit-Remaining' X-RateLimit-Reset: $ref: '#/components/headers/X-RateLimit-Reset' X-Request-ID: $ref: '#/components/headers/X-Request-ID' InternalError: content: application/json: schema: $ref: '#/components/schemas/ApiErrorResponse' description: Something went wrong on our side. Quote `error.request_id` to support. headers: X-Request-ID: $ref: '#/components/headers/X-Request-ID' securitySchemes: SailerApiToken: description: >- A workspace API token (`sk_live_...`) or an OAuth access token (`oat_live_...`). Create workspace tokens in Settings > API. Send either as `Authorization: Bearer `. scheme: bearer type: http ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.