> ## Documentation Index
> Fetch the complete documentation index at: https://docs.cartesia.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Cancel Call

> Terminates an active call. Only calls in the `started` status can be cancelled; the call ends with end reason `api_cancelled`.

Cancelling ends the call but does not delete its data. To delete a call's sensitive data after it ends, use `DELETE /agents/calls/{call_id}`.



## OpenAPI

````yaml /latest.yml POST /agents/calls/{call_id}/cancel
openapi: 3.0.1
info:
  title: Cartesia API
  version: 0.0.1
servers:
  - url: https://api.cartesia.ai
    description: Production
security: []
paths:
  /agents/calls/{call_id}/cancel:
    post:
      tags:
        - Agents
      summary: Cancel Call
      description: >-
        Terminates an active call. Only calls in the `started` status can be
        cancelled; the call ends with end reason `api_cancelled`.


        Cancelling ends the call but does not delete its data. To delete a
        call's sensitive data after it ends, use `DELETE
        /agents/calls/{call_id}`.
      operationId: agents_cancel-call
      parameters:
        - $ref: '#/components/parameters/CartesiaVersionHeader'
        - name: call_id
          in: path
          description: The ID of the call.
          required: true
          schema:
            type: string
      responses:
        '200':
          description: The call was cancelled.
          content:
            application/json:
              schema:
                type: object
                properties:
                  cancelled:
                    type: boolean
                    description: Always `true` when the cancel is confirmed.
                required:
                  - cancelled
        '400':
          description: The call is not currently active and cannot be cancelled.
        '404':
          description: Call not found, or no active connection was found for the call.
        '502':
          description: The cancel request could not be delivered. Retry the request.
      security:
        - APIKeyAuth: []
components:
  parameters:
    CartesiaVersionHeader:
      name: Cartesia-Version
      in: header
      description: API version header.
      required: true
      schema:
        type: string
        format: date
        example: '2026-03-01'
        enum:
          - '2026-03-01'
  securitySchemes:
    APIKeyAuth:
      type: http
      scheme: bearer
      bearerFormat: API Key
      description: >-
        Cartesia API key (`sk_car_...`). Get one at
        [play.cartesia.ai/keys](https://play.cartesia.ai/keys).

````