Call2Me LLM API

openapi: 3.2.0
info:
  title: Call2Me LLM API
  description: '# Call2Me Voice AI Platform API


    Programmatic interface to build, deploy and operate voice AI agents that can place

    and receive phone calls in real time. Designed to be consumed by humans **and** by

    AI agent frameworks (function-calling LLMs, MCP servers, automation platforms like

    Composio, Pipedream, Zapier, n8n).


    ## What you can do


    - **Place outbound calls** — give an agent a phone number to dial; the AI handles

    the conversation end-to-end and returns a transcript + recording.

    - **Manage AI agents** — create personalities, attach voices, system prompts,

    knowledge bases and post-call actions.

    - **Schedule calls** — one-shot or recurring (cron-like) outbound calls.

    - **Knowledge base (RAG)** — upload documents/URLs so the agent answers from your

    data with reduced hallucination.

    - **Inbound** — provision phone numbers that route to your agents.


    ## Common LLM tool-calling use cases


    | Goal | Endpoint |

    |------|----------|

    | "Call this person and read them this script" | `POST /v1/calls` |

    | "Schedule a follow-up tomorrow at 14:00" | `POST /v1/schedules` |

    | "Get the transcript of last call" | `GET /v1/calls/{id}` |

    | "Add this PDF to the agent''s brain" | `POST /v1/knowledge-base/{id}/sources` |


    ## Authentication


    Every request requires a Bearer token issued from the dashboard:


    ```

    Authorization: Bearer c2m_sk_xxxxxxxxxxxxxxxx

    ```


    Get your API key from the API Keys page.

    Keys are scoped per-workspace and can be rotated/revoked any time.


    ## Rate Limits


    | Plan | Requests/min | Concurrent Calls |

    |------|-------------|------------------|

    | Free | 60 | 1 |

    | Pro | 600 | 10 |

    | Enterprise | Unlimited | Unlimited |


    ## SDKs & Integrations


    - Python SDK

    - Node.js SDK

    - OpenAPI 3.1 spec: `/openapi.json` (use it to generate clients or register the

    service with AI tool platforms)


    ## Support


    - Email: support@call2me.app

    - Docs: https://docs.call2me.app

    - Discord: https://discord.gg/call2me'
  version: 1.0.0
  x-logo:
    url: https://call2me.app/logo.png
    altText: Call2Me Logo
  contact:
    name: Call2Me Support
    url: https://call2me.app/support
    email: support@call2me.app
  license:
    name: Commercial — see Terms of Service
    url: https://call2me.app/terms
  termsOfService: https://call2me.app/terms
servers:
- url: https://api.call2me.app
  description: Production
- url: http://localhost:8000
  description: Local Development
security:
- BearerAuth: []
tags:
- name: LLM
paths:
  /v1/llm/chat:
    post:
      tags:
      - LLM
      summary: Chat
      description: Chat with LLM (OpenAI) with optional RAG.
      operationId: chat_v1_llm_chat_post
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/ChatRequest'
        required: true
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ChatResponse'
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
components:
  schemas:
    FunctionDef:
      properties:
        name:
          type: string
          title: Name
        description:
          type: string
          title: Description
        parameters:
          additionalProperties: true
          type: object
          title: Parameters
      type: object
      required:
      - name
      - description
      - parameters
      title: FunctionDef
    ChatRequest:
      properties:
        messages:
          items:
            $ref: '#/components/schemas/ChatMessage-Input'
          type: array
          title: Messages
        model:
          anyOf:
          - type: string
          - type: 'null'
          title: Model
        temperature:
          type: number
          maximum: 2.0
          minimum: 0.0
          title: Temperature
          default: 0.7
        max_tokens:
          type: integer
          maximum: 4000.0
          minimum: 1.0
          title: Max Tokens
          default: 1000
        functions:
          anyOf:
          - items:
              $ref: '#/components/schemas/FunctionDef'
            type: array
          - type: 'null'
          title: Functions
        agent_id:
          anyOf:
          - type: string
          - type: 'null'
          title: Agent Id
          description: Agent ID for RAG context
      type: object
      required:
      - messages
      title: ChatRequest
    ValidationError:
      properties:
        loc:
          items:
            anyOf:
            - type: string
            - type: integer
          type: array
          title: Location
        msg:
          type: string
          title: Message
        type:
          type: string
          title: Error Type
        input:
          title: Input
        ctx:
          type: object
          title: Context
      type: object
      required:
      - loc
      - msg
      - type
      title: ValidationError
    ChatResponse:
      properties:
        content:
          type: string
          title: Content
        provider:
          type: string
          title: Provider
        model:
          type: string
          title: Model
        function_call:
          anyOf:
          - additionalProperties: true
            type: object
          - type: 'null'
          title: Function Call
        usage:
          additionalProperties: true
          type: object
          title: Usage
          default: {}
      type: object
      required:
      - content
      - provider
      - model
      title: ChatResponse
    HTTPValidationError:
      properties:
        detail:
          items:
            $ref: '#/components/schemas/ValidationError'
          type: array
          title: Detail
      type: object
      title: HTTPValidationError
    ChatMessage-Input:
      properties:
        role:
          type: string
          title: Role
        content:
          type: string
          title: Content
      type: object
      required:
      - role
      - content
      title: ChatMessage
  securitySchemes:
    BearerAuth:
      type: http
      scheme: bearer
      bearerFormat: API Key
      description: Enter your API key
externalDocs:
  description: Full developer documentation
  url: https://docs.call2me.app