Borrowing it
Nothing to install: this file belongs to attestd-io/attestd-mcp. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/attestd-io/attestd-mcp/main/CLAUDE.mdgit clone --depth 1 https://github.com/attestd-io/attestd-mcpWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/instructions/attestd-io/attestd-mcp/claude-md)<a href="https://agentmods.dev/instructions/attestd-io/attestd-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/attestd-io/attestd-mcp/claude-md/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/instructions/attestd-io/attestd-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/attestd-io/attestd-mcp/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00340 | $0.00340 |
| Opus 5 | $0.00170 | $0.00170 |
| Sonnet 5 | $0.00068 | $0.00068 |
| Haiku 4.5 | $0.00034 | $0.00034 |
Grade A, and why
attestd-mcp CLAUDE.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 8d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
For Claude Code and contributors
Build
npm install
npm run build
prebuild regenerates src/products.ts from ../Attestd-website/lib/products.ts via scripts/gen-products.mjs. Run from a checkout that has both attestd-mcp and Attestd-website under the same parent directory, or edit src/products.ts manually.
Local MCP smoke test (stdio)
Unix:
echo '{"jsonrpc":"2.0","id":1,"method":"tools/list","params":{}}' | ATTESTD_API_KEY=atst_... node dist/index.js
Windows (PowerShell), pipe a here-string or use cmd /c.
Implementation notes
- Shebang: Injected into
dist/index.jsbytsup(bannerintsup.config.ts), not duplicated insrc/index.ts. - SDK: Uses
@modelcontextprotocol/sdkv1Server+ListToolsRequestSchema/CallToolRequestSchema, not the newerMcpServerhelper from pre-release docs. - Four tools:
check_package_vulnerability,check_batch_vulnerabilities(both needATTESTD_API_KEY),get_cve_details(needs key), andlist_covered_products(static list without key; live data fromGET /v1/productswhen keyed). - Product list: Must stay aligned with marketing/docs catalog in
Attestd-website/lib/products.ts.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 8d ago First seen · 28 lines · 340 tokens per session scan A 3fd9bfe77928
attestd-mcp CLAUDE.md is an instructions file published in the GitHub repository attestd-io/attestd-mcp (0 stars, last pushed 2mo ago), licensed MIT. It adds 340 tokens to every session, about $0.0017 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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