Agent Ready CheckoutEdition . The pay layer for agents.

Guide

How to accept x402 for an API

In short

Add x402 middleware that returns HTTP 402 with your price and accepted networks, verify and settle through a facilitator, and return the resource on retry. Payments settle in stablecoins with no chargebacks; Coinbase charges $0.001 per onchain transaction after 1,000 a month; Stripe charges 1.5 percent.

What the sources say

  • A server responds with HTTP 402 to a request without payment, prompting the client to pay and retry; x402 charges zero protocol fees. x402.org, read 4 Nov 2026.
  • The CDP facilitator verifies and settles payments and screens addresses against OFAC and KYT lists. docs.cdp.coinbase.com, read 4 Nov 2026.
  • Coinbase facilitator: first 1,000 onchain transactions a month free, then $0.001 each. docs.cdp.coinbase.com, read 4 Nov 2026.
  • Stripe accepts x402 as USDC on Base, excluding New York businesses, at 1.5 percent for stablecoin payments. docs.stripe.com, read 4 Nov 2026.
  • The spec defines exact, upto, auth-capture and batch-settlement schemes; Lightning exact was added 23 Sep 2026. github.com, read 4 Nov 2026.

Profiles named in this guide

Read next

Sources

  1. x402.org, read 4 Nov 2026
  2. docs.cdp.coinbase.com/x402/core-concepts/facilitator, read 4 Nov 2026
  3. docs.stripe.com/payments/machine.md, read 4 Nov 2026
  4. x402 exact scheme on Lightning (lnbtc), read 4 Nov 2026

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