x402 Paid Agent Starter

Charge AI agents per call with templates in TypeScript and Python (FastAPI): 402 terms, facilitator verify, settle-then-work, capped payer scripts and registry listing.

What’s inside

TypeScript and Python (FastAPI) versions side by side
402 terms, facilitator verify, settle-then-work
Capped payer scripts
Registry listing

Tested

Tested end to end on Base Sepolia; 11 TypeScript + 17 Python tests.

License

MIT licensed: you can do anything with it.

FAQ

License?: MIT.
Mainnet?: Yes: Base mainnet with a mainnet facilitator, or Base Sepolia for testing.
What’s LAX?: An agent registry; listing costs 0.01 USDC and is optional.
How do I get the files?: Right after payment, Stripe’s confirmation page shows your download link.
Refunds?: Email hello@youraitools.co within 14 days if it doesn’t work and we can’t fix it.
Can I pay with crypto?: Yes. Pay the same price in USDC or USDT on Base, Ethereum, Arbitrum, Optimism, Polygon or Solana from the "Pay with crypto" button, with no account or KYC. We check the payment on-chain and show your download links as soon as it confirms.

Get x402 Paid Agent Starter

Paid endpoint templates in TypeScript and FastAPI: 402 terms, settle-then-work, capped payer scripts.

$29 one-time

Buy and download Pay with crypto

Save with a bundle

x402 Developer Bundle: 4 products for $59 ($96 separately, you save $37).

Pairs well with

Download$19

Hermes x402 Plugin Template

A Hermes plugin that pays your API per call in USDC, with approval prompts and spend caps.

View Hermes x402 Plugin Template

Servicefrom $19

x402 Settlement Check

We make one real paid call to your x402 endpoint and check that USDC settled.

View x402 Settlement Check

Download$29

x402 Builder Skills

4 SKILL.md skills to ship, audit, verify and list a pay-per-call x402 API.

View x402 Builder Skills