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OpenAPI Specification

openapi: 3.0.3
info:
  title: Cartesia Agents Pronunciation Dictionaries API
  description: 'The Cartesia REST API for real-time voice AI - text-to-speech and voice-changer generation (single-shot bytes or Server-Sent Events), batch speech-to-text transcription, voice management and cloning, audio infill, custom datasets, pronunciation dictionaries, API keys and scoped access tokens, the Voice Agents platform (agents, calls, call batches, phone numbers, telephony providers, webhooks, deployments, knowledge base documents/folders, and evaluation metrics), and usage reporting. All requests require a `Cartesia-Version` header and an `Authorization: Bearer` API key (`sk_car_...`) or short-lived access token. The lowest-latency, streaming surface for TTS and STT is a separate WebSocket protocol documented in the companion AsyncAPI document at asyncapi/cartesia-ai-asyncapi.yml.'
  version: '2026-03-01'
  contact:
    name: Cartesia
    url: https://cartesia.ai
  license:
    name: API documentation - Cartesia Terms of Service
    url: https://cartesia.ai/terms-of-service
servers:
- url: https://api.cartesia.ai
  description: Cartesia production API
security:
- bearerAuth: []
tags:
- name: Pronunciation Dictionaries
  description: Custom pronunciation overrides referenced by TTS requests.
paths:
  /pronunciation-dictionaries:
    get:
      operationId: listPronunciationDictionaries
      tags:
      - Pronunciation Dictionaries
      summary: List pronunciation dictionaries
      parameters:
      - $ref: '#/components/parameters/CartesiaVersion'
      responses:
        '200':
          description: A page of pronunciation dictionaries.
          content:
            application/json:
              schema:
                type: object
                properties:
                  data:
                    type: array
                    items:
                      $ref: '#/components/schemas/PronunciationDictionary'
        '401':
          $ref: '#/components/responses/Unauthorized'
    post:
      operationId: createPronunciationDictionary
      tags:
      - Pronunciation Dictionaries
      summary: Create a pronunciation dictionary
      parameters:
      - $ref: '#/components/parameters/CartesiaVersion'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
              - name
              - rules
              properties:
                name:
                  type: string
                rules:
                  type: array
                  items:
                    type: object
                    additionalProperties: true
      responses:
        '200':
          description: The created pronunciation dictionary.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/PronunciationDictionary'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '422':
          $ref: '#/components/responses/ValidationError'
  /pronunciation-dictionaries/{id}:
    parameters:
    - name: id
      in: path
      required: true
      description: The ID of the pronunciation dictionary.
      schema:
        type: string
    get:
      operationId: getPronunciationDictionary
      tags:
      - Pronunciation Dictionaries
      summary: Get a pronunciation dictionary
      parameters:
      - $ref: '#/components/parameters/CartesiaVersion'
      responses:
        '200':
          description: The requested pronunciation dictionary.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/PronunciationDictionary'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
    patch:
      operationId: updatePronunciationDictionary
      tags:
      - Pronunciation Dictionaries
      summary: Update a pronunciation dictionary
      parameters:
      - $ref: '#/components/parameters/CartesiaVersion'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                name:
                  type: string
                rules:
                  type: array
                  items:
                    type: object
                    additionalProperties: true
      responses:
        '200':
          description: The updated pronunciation dictionary.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/PronunciationDictionary'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
    delete:
      operationId: deletePronunciationDictionary
      tags:
      - Pronunciation Dictionaries
      summary: Delete a pronunciation dictionary
      parameters:
      - $ref: '#/components/parameters/CartesiaVersion'
      responses:
        '200':
          description: Deletion confirmation.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/DeleteResponse'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
components:
  schemas:
    DeleteResponse:
      type: object
      properties:
        id:
          type: string
        deleted:
          type: boolean
    PronunciationDictionary:
      type: object
      properties:
        id:
          type: string
        name:
          type: string
        rules:
          type: array
          items:
            type: object
            additionalProperties: true
        created_at:
          type: string
          format: date-time
    Error:
      type: object
      properties:
        title:
          type: string
        message:
          type: string
        error_code:
          type: string
        status_code:
          type: integer
        doc_url:
          type: string
        request_id:
          type: string
  responses:
    Unauthorized:
      description: Missing, invalid, or expired API key / access token.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    NotFound:
      description: The requested resource was not found.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    ValidationError:
      description: The request payload failed validation.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
  parameters:
    CartesiaVersion:
      name: Cartesia-Version
      in: header
      required: true
      description: API version date, e.g. 2026-03-01.
      schema:
        type: string
        example: '2026-03-01'
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: sk_car_... API key or short-lived access token
      description: 'Cartesia API key (sk_car_...) or a short-lived access token minted via POST /access-token, passed as Authorization: Bearer <token>. Every request also requires the Cartesia-Version header.'