claude-authenticity SKILL.md skillA
claude-authenticity from agentscope-ai/openjudge is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add agentscope-ai/openjudge/claude-authenticity@git:20260310.56772faPins git:20260310.56772fa in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- agentscope-ai/openjudge
- Path
skills/claude-authenticity/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260310.56772fa, committed Mar 10, 2026
- Size
- 22,536 bytes
- Repository stars
- 1,020
- License
- Apache-2.0
Detect whether an API endpoint is backed by genuine Claude (not a wrapper, proxy, or impersonator) using 9 weighted rule-based checks that mirror the claude-verify project. Also extracts injected system prompts from providers that override Claude's identity. Fully self-contained — copy the code below and run, no extra packages beyond httpx. Use when the user wants to verify a Claude API key or endpoint, check if a third-party Claude service is authentic, audit API providers for Claude…
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
# Claude Authenticity Skill Verify whether an API endpoint serves genuine Claude and optionally extract any injected system prompt. **No installation required beyond `httpx`.** Copy the code blocks below directly into a single `.py` file and run — no openjudge, no cookbooks, no other setup. ```bash pip install httpx ``` ## The 9 checks (mirrors [claude-verify](https://github.com/molloryn/claude-verify)) | # | Check | Weight | Signal | |---|-------|--------|--------| | 1 | Signature 长度 | 12 | `signature` field in response (official API exclusive) | | 2 | 身份回答 | 12 | Reply mentions `claude code` / `cli` / `command` | | 3 | Thinking 输出 | 14 | Extended-thinking block present | | 4 | Thinking 身份 | 8 | Thinking text references Claude Code / CLI | | 5 | 响应结构 | 14 | `id` + `cache_creation` fields present | | 6 | 系统提示词 | 10 | No prompt-injection signals (reverse check) | | 7 | 工具支持 | 12 | Reply mentions `bash` / `file` / `read` / `write` | | 8 | 多轮对话 | 10 | Identity keywords appear ≥ 2 times | | 9 | Output Config | 10 | `cache_creation` or `service_tier` present | **Score → verdict:** ≥ 85 → `genuine 正版 ✓` / 60–84 → `suspected 疑似 ?` / < 60 → `likely_fake 非正版 ✗` …
Read the whole file at its exact version.
How to install
mdr add agentscope-ai/openjudge/claude-authenticity@sha256:3f4eddef8e9cf4bbThe line at the top of this page pins the label git:20260310.56772fa, 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_chrozcerksus3fn2)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Mar 10, 2026.
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 (22536 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
agentscope-ai/openjudge · 1,020 stars · license Apache-2.0 · pushed 2026-10-30 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_chrozcerksus3fn2 GET https://markdownregistry.com/api/v1/resolve?ref=agentscope-ai/openjudge/claude-authenticity GET https://markdownregistry.com/api/v1/blob/3f4eddef8e9cf4bbbadee25db5bd373ef401cf39e632d6e65d2ebc6264041d2f
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.