aethercore-dev/ag402/ag402-skill

ag402 — AI Agent Payment Protocol

Use exec to run ag402 CLI commands. This skill provides autonomous payment capabilities for AI agents via the x402 protocol on Solana (USDC).

When to Use

• Agent needs to call a paid API (HTTP 402 response)
• Agent needs to check wallet balance or transaction history
• Agent needs to set up payment infrastructure
• Agent needs to start/stop a payment gateway

Quick Start

1. Check if ag402 is installed

ag402 --version

If not installed:

pip install ag402-core

2. Initialize wallet (non-interactive, agent-safe)

ag402 init

Creates a test wallet with $100 USDC. No prompts, no human input needed.

3. Verify setup

ag402 balance

Expected: $100.00 test balance.

Commands

Pay for an API call

ag402 pay <url>

Sends a request to <url>. If the server returns 402 Payment Required with an x402 challenge, ag402 automatically pays and retries. Returns the API response.

Example:

ag402 pay https://api.example.com/premium/data

With options:

ag402 pay https://api.example.com/generate \
  --method POST \
  --data '{"prompt": "hello"}' \
  --amount 2.50

Check balance

ag402 balance

View transaction history

ag402 history
ag402 history --limit 20 --type payment

Full status dashboard

ag402 status

Health check

ag402 doctor

Start payment gateway (seller mode)

ag402 serve --target http://localhost:8000 --price 0.01 --port 4020 &

Stop gateway

Kill the background process or use Ctrl+C in the terminal.

Production Mode

For real on-chain payments, set environment variables before running:

X402_MODE=production \
X402_NETWORK=mainnet \
SOLANA_RPC_URL=<your_rpc_url> \
AG402_UNLOCK_PASSWORD=<wallet_password> \
  ag402 pay <url>

Or configure persistently:

ag402 env set X402_MODE production
ag402 env set X402_NETWORK mainnet
ag402 env set SOLANA_RPC_URL <your_rpc_url>

Then run ag402 pay <url> normally.

Environment Variables

Security

1. Budget limits — daily and per-minute caps prevent runaway spending
2. Test mode first — always test with virtual funds before production
3. Wallet isolation — use a dedicated payment wallet, not your main wallet
4. Transaction audit — all payments logged via ag402 history

Error Recovery

Architecture

Agent (exec) → ag402 CLI → x402 protocol → Solana USDC payment → API response

The agent uses exec to invoke ag402 pay <url>. The CLI handles the full 402 → negotiate → pay → retry → return flow transparently.