openapi: 3.0.3
info:
  title: Cartesia Agents Datasets 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: Datasets
  description: Audio/text collections used to build custom fine-tunes and voices.
paths:
  /datasets:
    get:
      operationId: listDatasets
      tags:
      - Datasets
      summary: List Datasets
      parameters:
      - $ref: '#/components/parameters/CartesiaVersion'
      responses:
        '200':
          description: A page of datasets.
          content:
            application/json:
              schema:
                type: object
                properties:
                  data:
                    type: array
                    items:
                      $ref: '#/components/schemas/Dataset'
                  has_more:
                    type: boolean
        '401':
          $ref: '#/components/responses/Unauthorized'
  /datasets/:
    post:
      operationId: createDataset
      tags:
      - Datasets
      summary: Create Dataset
      parameters:
      - $ref: '#/components/parameters/CartesiaVersion'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
              - name
              properties:
                name:
                  type: string
                description:
                  type: string
      responses:
        '200':
          description: The created dataset.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Dataset'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '422':
          $ref: '#/components/responses/ValidationError'
  /datasets/{id}:
    parameters:
    - $ref: '#/components/parameters/DatasetId'
    get:
      operationId: getDataset
      tags:
      - Datasets
      summary: Get Dataset
      parameters:
      - $ref: '#/components/parameters/CartesiaVersion'
      responses:
        '200':
          description: The requested dataset.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Dataset'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
    patch:
      operationId: updateDataset
      tags:
      - Datasets
      summary: Update Dataset
      parameters:
      - $ref: '#/components/parameters/CartesiaVersion'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                name:
                  type: string
                description:
                  type: string
      responses:
        '200':
          description: The updated dataset.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Dataset'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
    delete:
      operationId: deleteDataset
      tags:
      - Datasets
      summary: Delete Dataset
      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'
  /datasets/{id}/files:
    parameters:
    - $ref: '#/components/parameters/DatasetId'
    get:
      operationId: listDatasetFiles
      tags:
      - Datasets
      summary: List files in a dataset
      parameters:
      - $ref: '#/components/parameters/CartesiaVersion'
      responses:
        '200':
          description: A page of dataset files.
          content:
            application/json:
              schema:
                type: object
                properties:
                  data:
                    type: array
                    items:
                      $ref: '#/components/schemas/DatasetFile'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
    post:
      operationId: uploadDatasetFile
      tags:
      - Datasets
      summary: Upload a file to a dataset
      parameters:
      - $ref: '#/components/parameters/CartesiaVersion'
      requestBody:
        required: true
        content:
          multipart/form-data:
            schema:
              type: object
              required:
              - file
              properties:
                file:
                  type: string
                  format: binary
      responses:
        '200':
          description: The uploaded file.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/DatasetFile'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
        '422':
          $ref: '#/components/responses/ValidationError'
  /datasets/{id}/files/{file_id}:
    parameters:
    - $ref: '#/components/parameters/DatasetId'
    - name: file_id
      in: path
      required: true
      description: The ID of the dataset file.
      schema:
        type: string
    delete:
      operationId: deleteDatasetFile
      tags:
      - Datasets
      summary: Remove a file from a dataset
      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:
    DatasetFile:
      type: object
      properties:
        id:
          type: string
        dataset_id:
          type: string
        name:
          type: string
        size_bytes:
          type: integer
        created_at:
          type: string
          format: date-time
    DeleteResponse:
      type: object
      properties:
        id:
          type: string
        deleted:
          type: boolean
    Dataset:
      type: object
      properties:
        id:
          type: string
        name:
          type: string
        description:
          type: string
        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'
    DatasetId:
      name: id
      in: path
      required: true
      description: The ID of the dataset.
      schema:
        type: string
  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.'

Where this information came from

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