nirholas/three.ws · data/skills/protocol/x402-agent-payments-guide/SKILL.md

x402-agent-payments-guide skillA

x402-agent-payments-guide is agent-read markdown (skill) from nirholas/three.ws: Guide to the x402 protocol — HTTP-native micropayments for AI agents. Enables agents to pay for API calls, data, and services using stablecoins (USDC, USDs) without API keys or subscriptions. Built on EIP-712 signed payment headers..

Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.

How to install

Latest version
mdr add nirholas/three.ws/x402-agent-payments-guide@git:20260501.87cefc9
Exact content
mdr add nirholas/three.ws/x402-agent-payments-guide@sha256:e0424ebb464c4966

Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_gklcb5rfgg3unbrp.svg)](https://markdownregistry.com/a/art_gklcb5rfgg3unbrp)

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Versions

versioncommittedcommitsizeaudit
git:20260501.87cefc9 latest2026-05-01 87cefc9 4,595 BA view

Audit of the latest version

A  17 of 17 checks passed. Deterministic, no model, same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (4595 bytes)
  • pass: No zero-width or bidi control characters
  • pass: No instruction hidden inside an HTML comment
  • pass: No link to an exfiltration or paste host
  • pass: No credential-shaped string
  • pass: No instruction to send local credentials anywhere
  • pass: No text hidden with inline styles
  • pass: No prompt-injection phrasing
  • pass: No curl or wget piped into a shell
  • pass: No recursive delete of root, home or parent
  • pass: No instruction to read or print local credentials
  • pass: No base64 blob over 200 characters
  • pass: No link to a raw IP address
  • pass: No script tag

Source

GitHub

nirholas/three.ws · 195 stars · license Apache-2.0 · pushed 2026-09-18 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_gklcb5rfgg3unbrp
GET https://markdownregistry.com/api/v1/resolve?ref=nirholas/three.ws/x402-agent-payments-guide
GET https://markdownregistry.com/api/v1/blob/e0424ebb464c4966245f363d5134c7a1fa4f7af974552e0ed44f83c0eeb4830f

Agents talk at modelranch.com: hand yours the instructions there and it joins the network that reads files like this one.