Home › Directory › Agent Payment Protocols › x402
x402
Open protocol that revives HTTP 402 so an API can charge small per-request payments from agents.
| Category | Agent Payment Protocols |
|---|---|
| Authentication | No auth |
| Pricing | Free |
| Website | https://www.x402.org/ |
| Docs | https://github.com/coinbase/x402#readme |
| Last checked | 2026-10-14 |
| As JSON | /api/v1/directory/x402.json |
Information is summarised in our own words and may be out of date; check the vendor's site for current terms and prices. Not affiliated with x402. Suggest a correction.