A2A

A2A Billing API

Stripe credit purchase for humans without crypto

Documentation GitHub OpenAPI

Operations 1

POST /billing/checkout-session Create a Stripe Checkout session to buy credits #

Specifications

⚙

OpenAPI

https://artifacts.apis.io/agtrepo-com/openapi/agtrepo-com-billing-api-openapi.yml

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OpenAPI Specification

openapi: 3.2.0
info:
  title: A2A Persistent Memory Protocol Billing API
  version: 0.1.0
  description: Encrypted, pay-per-use persistent memory storage for AI agents (and humans), gated by the x402 HTTP-402 payment standard on Base L2. This document describes the REST surface; the same operations are also available over MCP (streamable HTTP) at /mcp -- see /.well-known/agent-memory.json for pricing, TTL limits, and links. Endpoints marked 402 respond with an x402 payment-required challenge (see https://github.com/x402-foundation/x402) when no valid on-chain payment authorization is attached to the request; a wallet-funded credit balance or the free per-wallet trial allowance can also satisfy these instead of a fresh payment.
  termsOfService: https://agtrepo.com/legal
  contact:
    url: https://agtrepo.com
  license:
    name: See /legal
    url: https://agtrepo.com/legal
servers:
- url: https://agtrepo.com
tags:
- name: Billing
  description: Stripe credit purchase for humans without crypto
paths:
  /billing/checkout-session:
    post:
      tags:
      - Billing
      summary: Create a Stripe Checkout session to buy credits
      description: Human-facing on-ramp for a wallet-funded credit balance; not needed for agents paying via x402 directly.
      security:
      - sessionCookie: []
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
              - usdAmount
              properties:
                usdAmount:
                  type: number
                  minimum: 1
                  maximum: 500
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                type: object
                properties:
                  checkoutUrl:
                    type: string
                    format: uri
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '503':
          description: Credit purchase not configured
      operationId: postBillingCheckoutSession
      x-operation-id-source: derived
components:
  responses:
    BadRequest:
      description: Invalid request body
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    Unauthorized:
      description: No verified session or signature
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
  schemas:
    Error:
      type: object
      properties:
        error:
          type: string
      required:
      - error