What is buyapi-mcp CLAUDE.md?

An MCP server that lets an AI agent query BuyAPI, a service for finding and comparing vendors and technology stacks.

It is for vendor research, cost estimation, vendor comparison, and technology-stack recommendations. The server itself is a client; the data and main logic come from BuyAPI.

It removes the need to choose vendors from scattered information by providing tools for resolving vendors, comparing them, estimating costs, and finding related stacks.

How TheSnakeFang/buyapi-mcp configures Claude Code

Reuse

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.

Copy the file

curl -O https://raw.githubusercontent.com/TheSnakeFang/buyapi-mcp/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/TheSnakeFang/buyapi-mcp

Made for: Claude Code.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/thesnakefang/buyapi-mcp/claude-md/github.svg)](https://agentmods.dev/instructions/thesnakefang/buyapi-mcp/claude-md)

Your own site

<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.

Your own site · 80×15

<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>

Per session 544 This file is loaded in full into every session.

When invoked 544 The same file — it is already loaded in full.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

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 5.5	$0.00218	$0.00218
Sonnet 5.5	$0.00109	$0.00109
Haiku 4.5	$0.00054	$0.00054

Measured 2mo ago against content hash e24125ed1b1e, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

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 2mo 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.

CLAUDE.md · 47 lines

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-app repo
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 with vitest (21 tests)
CI: GitHub Actions (typecheck + test on push, npm publish on release tag)

Commands

pnpm build — Build to dist/
pnpm test — Run tests (21 tests)
pnpm lint — Run ESLint
pnpm typecheck — Type check
BUYAPI_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 descriptions
src/lib/api.ts — HTTP client calling buyapi.ai API routes
src/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: module field is required — don't remove it or npx breaks

Read the full file on GitHub · 47 lines

Changes

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.

2mo ago First seen · 47 lines · 544 tokens per session scan A e24125ed1b1e

Subscribe to this mod's changes

buyapi-mcp CLAUDE.md is an instructions file published in the GitHub repository TheSnakeFang/buyapi-mcp (1 stars, last pushed 2d ago), licensed MIT. It adds 544 tokens to every session, about $0.0022 per session on Opus 5.5. 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.

Backend and APIs Research

buyapi-mcp CLAUDE.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
buyapi-mcp CLAUDE.mdTheSnakeFang/buyapi-mcp	Instructions file	1	2d ago	MIT	A	544	Claude Code
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	yesterday	MIT	A	7,461	Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	yesterday	MIT	A	4,680	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	5,516	GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	274k	2d ago	MIT	A	4,313	Codex, OpenCode

buyapi-mcp: Instructions file for Claude Code