x402-payments SKILL.md skillA
x402-payments from aznatkoiny/zai-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add aznatkoiny/zai-skills/x402-payments@git:20261010.5b03da5Pins git:20261010.5b03da5 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- aznatkoiny/zai-skills
- Path
AI-Toolkit/skills/x402-payments/SKILL.md- Versions recorded
- 3
- Latest version
- git:20261010.5b03da5, committed Oct 10, 2026
- First version recorded
- Feb 13, 2026
- Size
- 7,872 bytes
- Repository stars
- 10
- License
- MIT
Build apps that charge for, or pay for, HTTP requests with the x402 protocol (HTTP 402 "Payment Required" plus stablecoin payments, usually USDC on Base or Solana). Covers paid API endpoints and middleware (Express, Hono, Next.js), clients and AI agents that pay for x402 resources with spending limits, MCP tools that charge or pay through x402, and moving from testnet to mainnet. Use when the user mentions x402, HTTP 402, per-request USDC payments, paywalled APIs for agents, or agent-to-agent…
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# x402 payments x402 puts payment into HTTP itself. A server answers an unpaid request with `402 Payment Required` and a description of what it accepts; the client signs a stablecoin payment authorization and retries; the server has a facilitator verify and settle it, then returns the resource. Your job with this skill is to help the user build either side of that exchange so it works, and so that nobody loses money or keys along the way. ## Money and keys This code moves real money once it points at mainnet, and a leaked private key empties a wallet. Keep these defaults unless the user deliberately chooses otherwise: - **Start on testnet.** Use Base Sepolia (`eip155:84532`) or Solana Devnet with the free `https://x402.org/facilitator`. Before writing a mainnet network ID, CDP credentials, or running a client that pays a mainnet resource, tell the user what will change and get a yes. …
Read the whole file at its exact version.
How to install
mdr add aznatkoiny/zai-skills/x402-payments@sha256:c908fe6ba8a0936aThe line at the top of this page pins the label git:20261010.5b03da5, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_gevc44nf4d2le4h5)
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Versions
The registry has recorded 3 versions of this file, between Feb 13, 2026 and Oct 10, 2026, about one every 119 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261010.5b03da5 latest | 2026-10-10 | 5b03da5 | 7,872 B | A | view · diff |
| git:20260726.901d869 | 2026-07-26 | 901d869 | 7,082 B | A | view · diff |
| git:20260213.9792cea | 2026-02-13 | 9792cea | 6,931 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (7872 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
aznatkoiny/zai-skills · 10 stars · license MIT · pushed 2026-11-07 · branch master
API
GET https://markdownregistry.com/api/v1/artifacts/art_gevc44nf4d2le4h5 GET https://markdownregistry.com/api/v1/resolve?ref=aznatkoiny/zai-skills/x402-payments GET https://markdownregistry.com/api/v1/blob/c908fe6ba8a0936a65a985c64e030c3a1741aec219b4c71621bcb2b9d1eb0247
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.