MCP Simple Server MCP Server

A minimal, reference implementation of a Model Context Protocol server with streamable HTTP transport. Built with FastMCP following the official Anthropic MCP specification 2025-06-18. Perfect starting point for building remote MCP servers. That is what the mcp simple server mcp server brings to an AI assistant: the same capability, reachable through the Model Context Protocol rather than a separate app or dashboard.

The short version

• ✅ Two Math Tools: add and multiply functions
• ✅ Streamable HTTP Transport: Modern MCP protocol with SSE support
• ✅ Session Management: Proper MCP initialization flow
• ✅ Remote Deployment: Railway, Heroku, Render deployment configs
• ✅ Automated Testing: Complete protocol validation and debugging tools
• ✅ Claude Desktop Integration: Ready for AI assistant integration

The tools it exposes

The server publishes 2 tools. What each one is for:

• Heroku — The Heroku tool exposed by this server
• Render — 1. Connect GitHub repository to Render 2. Render auto-detects render.yaml and Dockerfile 3. Deploys automatically

Getting it running

Because this one is hosted, setup is mostly authentication — you point your client at the endpoint and approve access. Nothing runs on your machine, so there is no runtime to keep patched.

What it needs from you

Configuration is passed through the environment: YOUR_SESSION_ID. Treat anything key-shaped as a real credential — scope it to the minimum the server needs, and rotate it if it ever lands in a shared config.

How it compares

Plenty of developer tooling servers cover similar ground. The differences that matter in practice are scope of access and how much setup stands between you and a working tool call. MCP Simple Server's toolset — Heroku, Render — is a fair guide to whether it matches your workflow. It is maintained by oleksandrsirenko; worth a glance at recent repository activity before you build anything load-bearing on it.

SyncDev reviews every entry in this directory against the project's own documentation before publishing, and revisits them as servers change.

Things to watch

• Your data travels to the provider's service, so the usual questions apply about what you send and what they retain.
• Keep per-call confirmation enabled while you learn its behaviour; it is the cheapest safeguard you have.