simple-mcp
A minimal MCP server providing basic tools for arithmetic, text echoing, and timezone-aware current time retrieval.
README
simple-mcp
A minimal Model Context Protocol server written in Python, served over Streamable HTTP so it can be deployed remotely.
It exposes three demo tools:
| Tool | Description |
|---|---|
add |
Add two numbers. |
echo |
Echo back text — handy for testing connectivity. |
current_time |
Current time in any IANA timezone (defaults to UTC). |
The MCP endpoint is served at /mcp.
Run locally
With uv (recommended):
uv run server.py
Or with plain pip:
pip install -r requirements.txt
python server.py
The server listens on http://0.0.0.0:8000/mcp. Override with the HOST and
PORT environment variables.
Quick smoke test
curl -s -X POST http://127.0.0.1:8000/mcp \
-H "Content-Type: application/json" \
-H "Accept: application/json, text/event-stream" \
-d '{"jsonrpc":"2.0","id":1,"method":"tools/list","params":{}}'
Run with Docker
docker build -t simple-mcp .
docker run -p 8000:8000 simple-mcp
Deploy (remote)
Any platform that runs a Docker container and injects a $PORT works
(the server reads PORT automatically).
Render (free tier, included render.yaml):
- Push this repo to GitHub.
- In Render: New + → Blueprint, select the repo. It reads
render.yamland provisions the service. - Your endpoint will be
https://<your-service>.onrender.com/mcp.
Railway / Fly.io / any VPS: build the Dockerfile and expose the port the
platform provides. No code changes needed.
Connect it to Claude
Once deployed, add the remote server by its URL. For Claude Code:
claude mcp add --transport http simple-mcp https://<your-service>.onrender.com/mcp
In Claude Desktop or claude.ai, add it under
Settings → Connectors → Add custom connector using the same /mcp URL.
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