Borrowing it
Nothing to install: this file belongs to damionrashford/RivalSearchMCP. 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/damionrashford/RivalSearchMCP/main/CLAUDE.mdgit clone --depth 1 https://github.com/damionrashford/RivalSearchMCPWrote 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/damionrashford/rivalsearchmcp/claude-md)<a href="https://agentmods.dev/instructions/damionrashford/rivalsearchmcp/claude-md"><img src="https://agentmods.dev/badge/instructions/damionrashford/rivalsearchmcp/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/damionrashford/rivalsearchmcp/claude-md"><img src="https://agentmods.dev/badge/instructions/damionrashford/rivalsearchmcp/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 | $0.02770 | $0.02770 |
| Opus 5 | $0.01385 | $0.01385 |
| Sonnet 5 | $0.00554 | $0.00554 |
| Haiku 4.5 | $0.00277 | $0.00277 |
Grade A, and why
RivalSearchMCP 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 10d 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 — 283 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CLAUDE.md
This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
Project Overview
RivalSearchMCP is an MCP server providing 9 specialized tools for web research, content discovery, and analysis. Built on FastMCP, it offers multi-engine search (Yahoo/DuckDuckGo), website traversal, scientific research, and AI-enhanced research workflows. Ships with Claude Code Agent Skills for standalone CLI usage.
- 100% free: No API keys required for core functionality
- Dual deployment: Hosted service at
https://RivalSearchMCP.fastmcp.app/mcpor local development - Transport modes: stdio (default, for CLI/IDE) or HTTP (production via
ENVIRONMENT=production)
Development Commands
The project uses uv for dependency management and the fastmcp CLI for running the server. Configuration lives in fastmcp.json (source / environment / deployment) and pyproject.toml.
Setup & Running
# Install all dependencies (prod + dev) into a uv-managed venv
uv sync --extra dev
# Set up pre-commit hooks
uv run pre-commit install
# Run server (auto-detects fastmcp.json)
fastmcp run
# Run with stdio transport (for MCP clients / IDEs)
fastmcp run --transport stdio
# Run with HTTP transport (production)
fastmcp run --transport http --host 0.0.0.0 --port 8000
# Inspect server's tools/resources/prompts
fastmcp inspect
# Launch MCP Inspector UI for interactive testing
fastmcp dev inspector
Testing
# Run all tests
uv run pytest
# Run specific test file
uv run pytest tests/test_web_search.py
# Run specific test function
uv run pytest tests/test_web_search.py::test_function_name
# Run with coverage report
uv run pytest --cov=src --cov-report=term-missing
# Verbose with short traceback
uv run pytest -v --tb=short
Code Quality
# Format code
uv run black src/ tests/
# Sort imports
uv run isort src/ tests/
# Lint with auto-fix
uv run ruff check --fix src/ tests/
# Type checking
uv run mypy src/
# Run all pre-commit hooks
uv run pre-commit run --all-files
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.
- 10d ago First seen · 283 lines · 2,770 tokens per session scan A 1f9b30f839fb
RivalSearchMCP CLAUDE.md is an instructions file published in the GitHub repository damionrashford/RivalSearchMCP (129 stars, last pushed yesterday), licensed MIT. It adds 2,770 tokens to every session, about $0.0138 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.
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