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OpenAPI Specification

openapi: 3.2.0
info:
  title: call4me Balance API
  version: 1.3.0
  description: 'Phone calls an AI agent places for its user: call a business, follow the call to its outcome, answer the caller''s questions mid-call, and patch the user in. Also the prepaid balance, the caller profile, scheduled calls, the account''s phone numbers and call recordings. The same operations as the MCP server at /mcp. Calls are billed per minute from pickup (phone menus and conversation; hold time at half price) from the prepaid balance; unanswered calls are free. Refusals name MCP tools (call4me_place_call is POST /api/calls, call4me_save_profile is PATCH /api/profile).'
  x-guidance: 'With a wallet and no account: POST /api/x402/calls with the call (to, business, goal, category, details, on_behalf_of, max_minutes) and pay the 402 in USDC on Base. A refusal (422 "Not calling yet") lists what to ask the user and takes no payment. The paid response returns the call id and an api_key; follow the call with GET /api/calls/{call_id}?wait_seconds=30 and Authorization: Bearer <api_key> until finished, answering open questions with POST /api/calls/{call_id}/answer. With an account: the bearer routes below, and GET /api to buy credits in USDC.'
  contact:
    name: call4me
    email: me@call4.me
    url: https://call4.me
servers:
- url: https://call4.me
tags:
- name: Balance
paths:
  /api/balance:
    get:
      operationId: getBalance
      description: The prepaid balance, the per-minute price (and the destinations priced differently), and the account's call4me numbers. Free.
      security:
      - bearerAuth: []
      responses:
        '200':
          description: The balance and numbers
          content:
            application/json:
              schema:
                $schema: https://json-schema.org/draft/2020-12/schema
                type: object
                properties:
                  balance:
                    type: string
                  balance_cents:
                    type: integer
                    minimum: -9007199254740991
                    maximum: 9007199254740991
                  price_per_minute:
                    type: string
                  price_per_minute_by_country:
                    type: object
                    propertyNames:
                      type: string
                    additionalProperties:
                      type: string
                  minutes_left:
                    type: integer
                    minimum: -9007199254740991
                    maximum: 9007199254740991
                  phone_number:
                    type:
                    - string
                    - 'null'
                  numbers:
                    type: array
                    items:
                      type: object
                      properties:
                        number:
                          type: string
                        e164:
                          type: string
                      required:
                      - number
                      - e164
                      additionalProperties: {}
                required:
                - balance
                - balance_cents
                - price_per_minute
                - price_per_minute_by_country
                - minutes_left
                - phone_number
                - numbers
                additionalProperties: {}
        '401':
          description: Request failed
          content:
            application/json:
              schema:
                type: object
                properties:
                  error:
                    type: string
                required:
                - error
      tags:
      - Balance
      summary: Get balance
      x-summary-source: derived
components:
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: A call4me API key or OAuth access token for the site or MCP resource.