OmniKit
Free, fully-offline MCP utility tools for agents: base64, UUID, JSON validation, SHA hashing, timestamps, URL codec, case conversion, and secure passwords. No API keys, no tracking, works offline - stdlib-only Python stdio server.
README
rookery-mcp
A free, fully-offline MCP (Model Context Protocol) server that exposes utility tools to any MCP client — Claude, Cursor, Cline, and other coding agents. Written in Python, runs over stdio, zero dependencies, no API keys, no tracking, works offline.
Tools
| Tool | What it does |
|---|---|
base64_encode |
UTF-8-safe Base64 encode |
base64_decode |
Base64 decode back to text |
uuid_v4 |
Generate 1–100 random UUID v4 |
json_validate |
Validate JSON, pretty-print or minify |
sha_hash |
SHA-256/384/512 hash of text |
timestamp_to_iso |
Unix seconds/ms → ISO-8601 UTC |
url_encode |
Percent-encode / decode |
case_convert |
snake / kebab / camel / pascal / upper / lower |
password_generate |
Cryptographically secure random password |
All tools are exposed via the standard MCP methods: tools/list and
tools/call (JSON-RPC 2.0 over stdio).
Requirements
- Python 3.9+
Run
python server.py
Install as a Python package:
uvx --from git+https://github.com/vikash-b5/rookery-mcp -- rookery-mcp
Add to an MCP client
Register python /path/to/server.py (or rookery-mcp) as a stdio MCP
server in your client's config (e.g. Claude Desktop, Cursor, Cline).
Docker
A Dockerfile is included for containerized / registry introspection:
FROM python:3.11-slim
WORKDIR /app
COPY pyproject.toml server.py README.md ./
CMD ["python", "-u", "server.py"]
Test
echo '{"jsonrpc":"2.0","id":1,"method":"initialize","params":{}}' | python server.py
python server.py --list-tools
The server starts instantly and answers initialize + tools/list
requests, so it passes MCP registry checks (Glama, mcp.so, official
registry).
License
MIT
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