> ## Documentation Index > Fetch the complete documentation index at: https://woku.app/docs/llms.txt > Use this file to discover all available pages before exploring further. # Send the CSAT survey by email or WhatsApp > Dispatches the CSAT survey for the given `csatToolId` to a list of recipients. The response reports per-recipient acceptance: quarantined respondents and recipients blocked by WhatsApp credits or notification policy are listed in `rejected` instead of failing the request. WhatsApp sends consume one WhatsApp credit per recipient. ## OpenAPI ````yaml /openapi-v1.json post /v1/csat/invitations openapi: 3.0.3 info: title: Woku Client API v1 description: >- Public Woku Client API. Switch the version selector at the top to view the v0 reference. This spec covers: - **Wokus** — create wokus, fetch review data, submit text/voice reviews, share by email. - **Companies** — `GET /companies/me` returns the caller company. - **Reports** — company-wide and per-tool NPS reports. - **External Trackers** — tag your Wokus with identifiers from third-party systems (CRM transaction id, ERP order id, etc.) and look them up later. ## Authentication All endpoints require a Bearer token in the `Authorization` header. Obtain your company API key from the Woku dashboard. ``` Authorization: Bearer your_api_key_here ``` ## Base URL Production: `https://clientapi.woku.app` ## Model (External Trackers) - **Tracker definition** (`ExternalTracker`): a per-company catalog entry like `{ name: 'trr', system: 'crm interno', description: '...' }`. Defined by an admin in the Woku dashboard. - **Tracker value** (`WokuExternalTrackerValue`): a string value bound to a (Woku, Tracker) pair. Multiple Wokus may share the same value. version: 1.0.0 contact: name: Woku Support url: https://woku.app email: team@woku.app servers: - url: https://clientapi.woku.app description: Production server security: [] tags: - name: Wokus description: >- Create wokus, fetch review data, submit text and voice reviews, share review links by email. - name: Companies description: Caller-company endpoint. - name: Reports description: NPS reports for the caller company and individual NPS tools. - name: NPS description: >- Capture NPS scores (company-level or per NPS tool) and fetch NPS tool definitions. - name: CSAT description: >- Capture CSAT (1-5 satisfaction) scores company-level or per CSAT tool, fetch tool definitions and responses, and submit text and voice feedback. - name: CES description: >- Capture CES (effort) scores company-level or per CES tool, fetch tool definitions and responses, and submit text and voice feedback. - name: External Trackers description: >- Tag Wokus with identifiers from external systems and look them up by name + value. - name: Quarantines description: >- Check whether a respondent is currently quarantined before prompting for feedback. - name: Invitations description: >- Survey distribution: send NPS surveys, forms and woku review invitations by email or WhatsApp. - name: Forms description: Fetch form definitions and submit responses from your own UI. - name: Flows description: Render flow journeys (ordered wokus with an optional NPS) in your own app. - name: Captures description: Mobile SDK capture ingestion paths: /v1/csat/invitations: post: tags: - Invitations summary: Send the CSAT survey by email or WhatsApp description: >- Dispatches the CSAT survey for the given `csatToolId` to a list of recipients. The response reports per-recipient acceptance: quarantined respondents and recipients blocked by WhatsApp credits or notification policy are listed in `rejected` instead of failing the request. WhatsApp sends consume one WhatsApp credit per recipient. operationId: v1SendCsatInvitations requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/V1CsatInvitationsRequest' responses: '202': description: Per-recipient dispatch summary. Sends are asynchronous. content: application/json: schema: $ref: '#/components/schemas/V1InvitationsResult' '400': description: Validation error content: application/json: schema: $ref: '#/components/schemas/ValidationError' '403': description: >- Invalid or missing API key, or the CSAT tool does not belong to the caller company content: application/json: schema: $ref: '#/components/schemas/ForbiddenError' security: - BearerAuth: [] components: schemas: V1CsatInvitationsRequest: allOf: - $ref: '#/components/schemas/V1InvitationsRequest' - type: object required: - csatToolId properties: csatToolId: type: string description: >- CSAT tool to survey for (always required: CSAT is always custom). V1InvitationsResult: type: object properties: channel: type: string enum: - email - whatsapp accepted: type: array items: type: string description: >- Recipients whose invitation was dispatched (or queued). Normalized: emails lowercased, phones digits only. rejected: type: array items: type: object properties: recipient: type: string reason: type: string enum: - invalid_recipient - quarantined - insufficient_credits_or_blocked - send_failed description: Recipients whose invitation was not dispatched, with the reason. ValidationError: type: object properties: statusCode: type: integer example: 400 message: oneOf: - type: string - type: array items: type: string error: type: string example: Bad Request ForbiddenError: type: object properties: statusCode: type: integer example: 403 message: type: string example: Authentication required error: type: string example: Forbidden V1InvitationsRequest: type: object required: - channel - recipients properties: channel: type: string enum: - email - whatsapp description: Delivery channel for the invitations. recipients: type: array minItems: 1 maxItems: 100 items: type: string description: >- Email addresses (email channel) or phone numbers with country code, digits only, e.g. 56912345678 (whatsapp channel). language: type: string enum: - es - en description: Language of the invitation template. Defaults to es. securitySchemes: BearerAuth: type: http scheme: bearer description: >- Company API key. Obtain this from your Woku dashboard under Settings > API Keys. The same key used for the v0 endpoints. ````