x402 SKILL.md skillA
x402 from starchild-ai-agent/official-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add starchild-ai-agent/official-skills/x402@v2.27.0Pins v2.27.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- starchild-ai-agent/official-skills
- Path
x402/SKILL.md- Versions recorded
- 5
- Latest version
- v2.27.0, committed Aug 16, 2026
- First version recorded
- Jul 30, 2026
- Size
- 32,653 bytes
- Repository stars
- 32
- License
- none declared
Monetize any user project/service with the x402 payment protocol on platform networks (Base + Monad + Robinhood + X Layer + Solana; Starchild platform billing: pay_per_use / lifetime / weekly / monthly / quarterly / yearly / prepaid, plus multi-plan services), limited-time free promotions (amount-0 verify, no settle/debit), and pay other agents' x402 services. Use when the user wants to charge for an API/service, run a free promo on a paid listing, accept USDC from other agents, or call a…
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 Monetization Skill
Turn any local HTTP service into a paid service on platform networks (Base +
Monad + Robinhood + X Layer; x402 V2 protocol, `exact` scheme, USDC/USDG via EIP-3009 —
buyer pays zero gas), and act as a buyer paying other agents' x402 services
with the user's Privy wallet.
**Architecture: reverse-proxy sidecar.** The gateway (`gateway/app.py`) sits in
front of the user's untouched service. One unified gateway, three billing modes
as config presets — the error contract is identical across all modes.
```
buyer agent ──402/PAYMENT-SIGNATURE──> gateway :840x ──plain HTTP──> user service :port
│
facilitator (verify + settle on Base/Monad/Robinhood/X Layer/Solana) ──USDC/USDG──> user's Privy wallet
```
## Reference files (MUST read before the matching task)
Detailed material lives in `skills/x402/references/` — it is part of this
skill. Do NOT guess or improvise what these files cover:
| Before you… | MUST first `read_file` |
|---|---|
…Read the whole file at its exact version.
How to install
mdr add starchild-ai-agent/official-skills/x402@sha256:1417ab8c19d56a0cThe line at the top of this page pins the label v2.27.0, 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_yxmvieahuxqssqp5)
5 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Jul 30, 2026 and Aug 16, 2026, about one every 4 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v2.27.0 latest | 2026-08-16 | 30ad61b | 32,653 B | A | view · diff |
| v2.26.0 | 2026-08-06 | 7872937 | 32,653 B | A | view · diff |
| v2.23.7 | 2026-07-30 | 81dd0c2 | 30,606 B | A | view · diff |
| v2.23.6 | 2026-07-30 | 9fa00f0 | 30,606 B | A | view · diff |
| v2.23.5 | 2026-07-30 | 621d480 | 30,606 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 (32653 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
starchild-ai-agent/official-skills · 32 stars · license none declared · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_yxmvieahuxqssqp5 GET https://markdownregistry.com/api/v1/resolve?ref=starchild-ai-agent/official-skills/x402 GET https://markdownregistry.com/api/v1/blob/1417ab8c19d56a0cddd6918dc7bfa3636e14c098d561e8ab6c12f10a70866b37
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.
More from starchild-ai-agent/official-skills
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