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google-researcher-mcp: Instructions file for Claude Code

CLAUDE.md

google-researcher-mcp CLAUDE.md is an instructions file for Claude Code from zoharbabin/google-researcher-mcp. It costs 835 tokens per session, scanned A, original, MIT.

Project instructions for a server that gives AI assistants Google Search, web scraping, and research tools through MCP, a standard way for AI assistants to call external tools.

In plain words
What is it for?
Use them to install dependencies, build or start the server, choose its input mode, and run unit or end-to-end tests.
Why use it?
They collect the setup, build, run, transport, and testing details so contributors do not have to reconstruct them from the code.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: mentions CLAUDE.md.

This is zoharbabin/google-researcher-mcp's own configuration. It tells Claude Code how to work on google-researcher-mcp itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything google-researcher-mcp configures →

not rated 35repo 3mo ago A scan 835 tokens original MIT archived
View source ↗ zoharbabin/google-researcher-mcp
Reuse

Borrowing it

Nothing to install: this file belongs to zoharbabin/google-researcher-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/zoharbabin/google-researcher-mcp/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/zoharbabin/google-researcher-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.

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README.md
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<a href="https://agentmods.dev/instructions/zoharbabin/google-researcher-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/zoharbabin/google-researcher-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.

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Your own site · 80×15
<a href="https://agentmods.dev/instructions/zoharbabin/google-researcher-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/zoharbabin/google-researcher-mcp/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 835 This file is loaded in full into every session.
When invoked 835 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00835 $0.00835
Opus 5 $0.00417 $0.00417
Sonnet 5 $0.00167 $0.00167
Haiku 4.5 $0.00084 $0.00084

Measured 12d ago against content hash d31d08dbed8b, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

google-researcher-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 12d 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 · 95 lines

How it starts

The opening of the file, as written. The whole thing — 95 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md - Canonical Project Context

Project Overview

google-researcher-mcp - An MCP (Model Context Protocol) server providing Google Search, web scraping, and multi-source research tools for AI assistants.

Quick Commands

Build & Run

npm install                    # Install deps + Chromium browser (via postinstall)
npm run build                  # Build TypeScript to dist/
npm start                      # Start server (STDIO mode default)
npm run dev                    # Start with hot reload (development)
PORT=3001 npm start            # Start HTTP server on custom port

Testing

npm test                       # Run all unit/component tests (860+)
npm run test:coverage          # Generate code coverage report
npm run test:e2e               # Full E2E suite (STDIO + SSE + YouTube)
npm run test:e2e:stdio         # STDIO transport E2E only
npm run test:e2e:sse           # HTTP/SSE transport E2E only
npm run test:e2e:youtube       # YouTube transcript E2E only

Server Ports

  • Default: PORT 3000 (configurable via PORT env var)
  • STDIO Transport: No port (standard input/output)
  • HTTP/SSE Transport: Listens on PORT (default 3000)

Transport Modes

  1. STDIO (default): For Claude Desktop and direct MCP clients
  2. HTTP/SSE: For web clients, requires OAuth configuration

Environment Variables

Required for Google Search:

  • GOOGLE_CUSTOM_SEARCH_API_KEY
  • GOOGLE_CUSTOM_SEARCH_ID

Required for HTTP transport (OAuth 2.1):

  • OAUTH_ISSUER_URL
  • OAUTH_AUDIENCE

Optional:

  • PORT (default: 3000)
  • MCP_TEST_MODE=stdio (force STDIO only)
  • ALLOWED_ORIGINS (CORS origins)
  • ALLOW_PRIVATE_IPS (for local development)

Architecture

src/
├── server.ts          # Main server entry point
├── cache/             # Caching layer with persistence
├── documents/         # PDF, DOCX, PPTX parsing
├── prompts/           # MCP Prompts primitive
├── resources/         # MCP Resources primitive
├── schemas/           # Output schemas
├── shared/            # Shared utilities (OAuth, logging, etc.)
├── tools/             # Tool implementations
├── types/             # TypeScript types
└── youtube/           # YouTube transcript extraction

Read the full file on GitHub · 95 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.

  1. 12d ago First seen · 95 lines · 835 tokens per session scan A d31d08dbed8b

Subscribe to this mod's changes

google-researcher-mcp CLAUDE.md is an instructions file published in the GitHub repository zoharbabin/google-researcher-mcp (35 stars, last pushed 3mo ago), licensed MIT. It adds 835 tokens to every session, about $0.0042 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 2026-08-30.

Researchacademic-searchai-assistantai-toolsanthropicclaudegoogle-search
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