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Ship x402
shipx402.com

shipx402.com

Learn x402. Ship APIs that get paid per request.

x402 lets an API charge a small payment before it returns data. Learn the loop, practice a Solana wallet on Devnet, then ship and validate real 402s.

New here? Start learningReady to buildCheck a 402Practice wallet

New here

Plain-English lessons on what x402 is and how the payment loop works.

Learn x402

Ready to build

Generate paste-ready middleware for Express, Next.js, or Hono.

Ship generator

Already have an API

Paste a URL and grade the 402 response for agent readiness.

402 Checker

Practice wallet

Client-side keys, write-downs, encrypted backups. Never cloud custody.

Live 402 lab

Sign a payment intent, retry, unlock. Replay protection included.

Readable by people and AI

Clear pages, llms.txt, curriculum JSON, and a live donate endpoint.

FAQ

What is x402?

x402 is an open protocol that uses the HTTP 402 Payment Required status code so apps and AI agents can pay for web resources per request, typically settling stablecoins on networks like Solana.

Is this affiliated with Coinbase or the x402 Foundation?

No. Ship x402 is an independent educational project. Not affiliated with Coinbase, the x402 Foundation, or the Solana Foundation.

Do my keys ever leave my browser?

No. The practice wallet generates and signs only on your device. We do not store private keys on a server.

Can AI agents use this site?

Yes. Agents can fetch /api/agents/curriculum, try /api/x402/lab, and tip via /api/x402/donate. See /llms.txt for a machine-readable map.