---
title: "x402 | x402 agent payments HTTP 402 | Agent-Ready Check"
description: "x402 revives HTTP 402 Payment Required as an agent-native payment flow: the server states its price, the client pays, the request completes. Pass criteria: Payable routes answer HTTP 402 with x402 requirements, or a discovery document is published."
locale: en
canonical: https://agent-ready.t0ols.com/checks/x402/
---

# x402

> Category: Commerce

x402 revives HTTP 402 Payment Required as an agent-native payment flow: the server states its price, the client pays, the request completes.

## Why it matters

For content and APIs that cost money to produce, per-request payment beats a subscription an agent cannot sign up for.

## Pass criteria

Payable routes answer HTTP 402 with x402 requirements, or a discovery document is published.

## How to implement it

Goal: Support x402 protocol for agent-native HTTP payments

Payable routes answer HTTP 402 with x402 requirements, or a discovery document is published.

The step-by-step implementation prompt is part of the paid tier. The free layer gives you the diagnosis, the evidence and the specification links.

Specifications: https://www.x402.org/, https://github.com/coinbase/x402
Implementation notes: https://agent-ready.t0ols.com/.well-known/agent-skills/x402/SKILL.md