Borrowing it
Nothing to install: this file belongs to TheSnakeFang/buyapi-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/TheSnakeFang/buyapi-mcp/main/CLAUDE.mdgit clone --depth 1 https://github.com/TheSnakeFang/buyapi-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/thesnakefang/buyapi-mcp/claude-md)<a href="https://agentmods.dev/instructions/thesnakefang/buyapi-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/thesnakefang/buyapi-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/thesnakefang/buyapi-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/thesnakefang/buyapi-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 | $0.00544 | $0.00544 |
| Opus 5 | $0.00272 | $0.00272 |
| Sonnet 5 | $0.00109 | $0.00109 |
| Haiku 4.5 | $0.00054 | $0.00054 |
Grade A, and why
buyapi-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.
How it starts
The opening of the file, as written. The whole thing — 47 lines — stays where its author put it; the contents beside it link to each section on GitHub.
BuyAPI MCP Server
Public, open-source MCP server for BuyAPI — the tool AI agents call when they need to pick a vendor.
Published: [email protected] on npm; buyapi-mcp is deprecated and points users to buyapi
Live endpoint: https://buyapi.ai/api/mcp
What This Repo Is
- TypeScript MCP server with 7 tools:
vendors.resolve,vendors.details,vendors.evidence,vendors.compare,vendors.estimateCost,stacks.findSimilar,stacks.recommend - Calls the BuyAPI backend API (
https://buyapi.ai) — contains NO vendor data itself - Thin client (~300 lines). All business logic and vendor data lives in the private
buyapi-apprepo - MIT licensed for trust and distribution
What This Repo Is NOT
- No seed data, no backend logic, no API keys, no private information
- No planning docs — those live in the private app repo
- Changes here are visible to the public — review before committing
Stack
- TypeScript,
@modelcontextprotocol/sdk,zod - Bundled with
tsup, tested withvitest(21 tests) - CI: GitHub Actions (typecheck + test on push, npm publish on release tag)
Commands
pnpm build— Build todist/pnpm test— Run tests (21 tests)pnpm lint— Run ESLintpnpm typecheck— Type checkBUYAPI_API_URL=http://localhost:3000 node dist/index.js— Run locally against dev backend
Architecture
src/index.ts— MCP server entry, tool registration with detailed LLM-facing descriptionssrc/lib/api.ts— HTTP client calling buyapi.ai API routessrc/lib/format.ts— Response formatting (Markdown output optimized for LLM consumption)src/lib/types.ts— Shared types (duplicated from app repo)
Publishing
- Bump version in
package.json - Commit and push to main
- Create GitHub release with
v*tag → CI auto-publishes to npm
Important
- Tool descriptions are prompt engineering — changes affect how LLMs use BuyAPI
- Keep the README install instructions current for every major MCP client
- Never add vendor data, API keys, or internal docs to this repo
- The
type: modulefield is required — don't remove it or npx breaks
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 · 47 lines · 544 tokens per session scan A e24125ed1b1e
buyapi-mcp CLAUDE.md is an instructions file published in the GitHub repository TheSnakeFang/buyapi-mcp (1 stars, last pushed yesterday), licensed MIT. It adds 544 tokens to every session, about $0.0027 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.
Other instructions, from other repositories
vibe-coding-prompt-template backend.instructions.md
Instructions for KhazP/vibe-coding-prompt-template: Read AGENTS.md, agentdocs/techstack.md, and agentdocs/codepatterns.md.
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
codex AGENTS.md
AGENTS.md instructions for openai/codex, covering rust/codex-rs, the codex-core crate, code review rules, crate api surface and model visible context.
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, applying the notice (cutover) and fallback chain (never fail the build).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.