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tools402-authorize

v1.0.0

Published

2 months ago

Generate an EIP-3009 session token to authorize tools402 to pull USDC on Base. Used once per session by AI agents calling tools402.dev APIs.

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tools402 x402 usdc base eip-3009 ai-agent session-token authorize

tools402-authorize

Generate a session token for tools402.dev — an EIP-3009 TransferWithAuthorization signed offline that authorizes tools402 to pull up to N USDC from your wallet on Base mainnet.

Usage

npx tools402-authorize --amount 10 --days 30 --private-key 0xYOUR_KEY

Or via env vars:

PRIVATE_KEY=0xYOUR_KEY TOOLS402_AMOUNT=10 TOOLS402_DAYS=30 npx tools402-authorize

The CLI prints a TOOLS402_SESSION_TOKEN=... value. Add it to your agent config (e.g. claude_desktop_config.json for Claude Code, or your env vars).

How it works

You sign an EIP-3009 TransferWithAuthorization offline. Your private key never leaves your machine.
The signed authorization is encoded as a base64url session token.
Your AI agent sends this token in the X-Session-Token HTTP header on each tools402 API call.
tools402's facilitator submits the authorization on-chain to pull USDC up to the cap, then deducts atomic amounts off-chain until exhausted.
When the cap is consumed or the deadline expires, sign a fresh token.

Worst-case attack

If tools402 is fully compromised between now and the expiry, an attacker can pull at most --amount USDC from your wallet. Choose a cap appropriate to your risk tolerance.

Source

Part of tools402. Documentation: https://tools402.dev/docs/integrations.

License: MIT.