360 Secure SkillHub
360 安全技能中心

A2A Payments

该 Skill 提供 APay 支付工具集，可在 Base 链上以 USDC 支付服务、查询余额与预算、估算含 0.5% 平台费的成本、开通与结算流式支付通道，并在 x402 协议下遇到 HTTP 402 时自动付款后重试请求。

paparusi
paparusi
热度 60.77
最近更新 2026-05-18 12:05:42
分类：自动化依赖：MCP 服务 / 第三方 API应用场景：财务 / API 集成 / 工作流

安装技能

复制下面的话术发给你的 Agent，它会通过 secure-skills 检索并安装该技能。

执行命令安装此 skill： npx secure-skills-cli add a2a-payments
Metadata
name
a2a-payments
description
Blockchain USDC payments via APay — pay services, manage budgets, open streaming channels, and handle x402 protocol.
metadata
{"openclaw":{"emoji":"💰","requires":{},"install":[{"id":"plugin","kind":"node","package":"@a2a/openclaw-plugin","label":"Install A2A Corp plugin"}]}}

A2A Payments (APay)

Blockchain-native USDC payments for AI agents on Base chain. Pay for services, manage budgets, and handle micropayments.

Quick Start

Check your balance:

Use apay_check_balance to see my USDC balance

Pay a service:

Use apay_pay_service with serviceId "svc-123" and amount "0.50"

Available Tools

Balance & Budget

Tool Description
apay_check_balance Check USDC balance, daily budget, spending limits
apay_budget_check Verify if a specific amount is affordable
apay_spending_history Get spending analytics and history

Payments

Tool Description
apay_pay_service Pay a service (agent pays gas)
apay_pay_signed Gasless signed payment (server submits on-chain)
apay_estimate_cost Estimate cost including 0.5% platform fee

Services

Tool Description
apay_list_services List available APay services
apay_get_service Get detailed service info

Payment Channels (Streaming)

Tool Description
apay_channel_status Check channel status
apay_stream_open Open channel with USDC deposit
apay_stream_pay Sign off-chain micropayment
apay_stream_close Close channel (refund unspent)

x402 Protocol

Tool Description
apay_x402_fetch Fetch URL with automatic x402 payment on HTTP 402

Workflows

Pay for a tool execution

  1. apay_budget_check — verify affordability
  2. apay_estimate_cost — see total with fees
  3. apay_pay_service — execute payment
  4. Receive payment receipt with tx hash

Streaming micropayments

For services that charge per-request (API calls, data feeds):

  1. apay_stream_open — deposit USDC into channel
  2. apay_stream_pay — sign micropayments (off-chain, instant)
  3. apay_stream_close — settle on-chain, refund remainder

x402 auto-payment

For services using the HTTP 402 payment protocol:

Use apay_x402_fetch with url "https://api.example.com/premium/data" and maxPayment "1.00"

The tool automatically detects 402 responses, pays the required amount, and retries the request.

Network

  • Chain: Base (Coinbase L2)
  • Stablecoin: USDC (6 decimals)
  • Model: Escrow-based sessions with spending limits
  • Testnet: base-sepolia for development