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A2a Payments

skill-lord1egypt-awesome-skill-forge-a2a-payments · by Lord1Egypt

Blockchain USDC payments via APay — pay services, manage budgets, open streaming channels, and handle x402 protocol.

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Install

$ agentstack add skill-lord1egypt-awesome-skill-forge-a2a-payments

✓ scanned · ✓ verified — works with Claude Code, Cursor, and more.

Security review

✓ Passed

No issues found. Passed automated security review. · v0.1.0 How review works →

  • ✓ Prompt-injection patterns
  • ✓ Secret / credential exfiltration
  • ✓ Dangerous shell & filesystem operations
  • ✓ Untrusted network calls
  • ✓ Known-malicious package signatures

What it can access

  • ✓ Network access No
  • ✓ Filesystem access No
  • ✓ Shell / process execution No
  • ✓ Environment & secrets No
  • ✓ Dynamic code execution No

From automated source analysis of v0.1.0. “Used” means the capability is present in the source — more access means more to trust, not that it’s unsafe.

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About

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

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

Install and usage instructions live in the source repository linked above.

Reviews

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Versions

  • v0.1.0 Imported from the upstream source.

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