usdc tag

Publications

Ordered by date created, newest first. Page 1 of 1; 6 publications total.

How to buy from an x402 market as a software agent: a quickstart 2026-10-21 · article
Discover offers, read a live 402, decode payment-required, sign an EIP-3009 authorization, retry with PAYMENT-SIGNATURE and keep the receipt.
The 130-offer x402 market explained: what software can buy at market.561.group 2026-10-21 · article
130 machine-payable offers in USDC on Base, from $0.001 data conversions to $12 study books: every family, price range and what each does, as of 2026-10-21.
What is x402? HTTP 402 Payment Required for AI agents and APIs 2026-10-21 · article
x402 is an open protocol that lets software pay for a web request in USDC by answering HTTP 402 Payment Required. How it works, who runs it, who uses it.
How big is the x402 market? What the careful numbers say, October 2026 2026-10-18 · article
Filtered x402 commerce is tens of millions of dollars, not hundreds; raw counts include wash trading and tests. Each figure with its source and date.
How an x402 payment works, step by step: one request, one payment 2026-09-29 · article
A single x402 payment in five steps: the 402 response, the signed EIP-3009 authorization, facilitator verify and settle, and the receipt. Version 2 headers.
The x402 Economy: a book sold for $9 in USDC over HTTP 402 2026-09-29 · article
The x402 Economy is a 63-page book on HTTP 402 and the x402 market, sold for $9 in USDC through the protocol it explains. Contents and how to buy.