agent-payments tag

Publications

Ordered by date created, newest first. All 3 publications are shown on this page.

How an x402 payment works, step by step, from a real 402 response 2026-10-21 · article
Decode a live x402 v2 challenge header by header: the 402, PAYMENT-REQUIRED, the signed EIP-3009 authorization, settlement and the receipt.
What an x402 seller should do that the spec doesn't require 2026-10-21 · article
Eight seller behaviors beyond the x402 spec, each running on a live endpoint: refuse before charging, recover purchases, pin payees, one catalog.
Refuse before you charge: how an x402 API stops billing agents for bad requests 2026-10-13 · article
Validate the body and refuse with 400, 415 or 422 before any 402 challenge, and cancel settlement if the handler fails. Real live responses included.