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OpenLine

Overview

Your Android phone's SIM as a voice API.

OpenLine API 0.1.0

Section titled “OpenLine API 0.1.0”

Place, answer and control real phone calls on an Android phone’s SIM, and stream their audio to your code or AI agent. Self-hosted: the base URL is your own server, usually a Tailscale Funnel or Cloudflare Tunnel address.

Authenticate with an API key from the console’s Settings page (or HTTP_GATEWAY_API_KEY from server/.env) as Authorization: Bearer <key> or x-api-key: <key>.

Errors use one shape: {"error": {"code": "DEVICE_OFFLINE", "message": "device is offline"}}.

Call audio uses WebSockets, which OpenAPI can’t describe; see the Agent streams and Media stream guides.

Information

  • License: MIT
  • OpenAPI version: 3.1.0

Operations

Section titled “Operations”
GET
/v1/calls
POST
/v1/calls
GET
/v1/calls/{callId}
POST
/v1/calls/{callId}/{action}
POST
/v1/calls/{callId}/dtmf
GET
/v1/calls/{callId}/events
GET
/v1/calls/{callId}/transcript
GET
/v1/calls/{callId}/stream
POST
/v1/calls/{callId}/stream
DELETE
/v1/calls/{callId}/stream
GET
/v1/devices
GET
/v1/devices/{deviceId}
DELETE
/v1/devices/{deviceId}
POST
/v1/pairing
GET
/v1/calls/{callId}/agent
POST
/v1/calls/{callId}/agent
DELETE
/v1/calls/{callId}/agent
GET
/v1/agent
PUT
/v1/agent
GET
/v1/agent/messages
GET
/v1/webhook-deliveries
GET
/v1/settings
PUT
/v1/settings
GET
/v1/api-keys
POST
/v1/api-keys
DELETE
/v1/api-keys/{id}
GET
/health

Authentication

Section titled “Authentication”

bearer

Section titled “bearer”

An API key as a bearer token.

Security scheme type: http

apiKey

Section titled “apiKey”

Security scheme type: apiKey

Header parameter name: x-api-key