Eight languages, eight SDKs at very different levels of maturity, and one working example each. Pick yours.
The language is the easy decision. Getting someone to try your server is the hard one — MCP Showcase turns any MCP endpoint into a live playground with documentation for every tool.
Including whether it has an officially maintained SDK, which varies more than you would expect.
Each page shows a complete tool definition in that language, not pseudocode.
The MCP Inspector confirms the handshake and shows exactly what an agent will see.
The protocol is identical everywhere — tools, resources and prompts behave the same regardless of what you write them in. What differs is how much the SDK does for you, how schemas get declared, and whether the library is officially maintained at all.
| Language | SDK | Status | Install |
|---|---|---|---|
| Python | modelcontextprotocol/python-sdk (FastMCP) | Official | pip install mcp |
| TypeScript | modelcontextprotocol/typescript-sdk | Official | npm install @modelcontextprotocol/sdk zod |
| Go | modelcontextprotocol/go-sdk | Official | go get github.com/modelcontextprotocol/go-sdk |
| Java | modelcontextprotocol/java-sdk | Official | Maven: io.modelcontextprotocol.sdk:mcp |
| C# | modelcontextprotocol/csharp-sdk | Official | dotnet add package ModelContextProtocol |
| Rust | modelcontextprotocol/rust-sdk (rmcp) | Official | cargo add rmcp |
| Ruby | community SDKs | Community | gem install mcp |
| PHP | community SDKs | Community | composer require ... |
Whichever your API is already written in. An MCP server is a thin wrapper over code you have, and splitting it across runtimes buys you nothing but a deployment to maintain. If you are genuinely starting fresh, Python and TypeScript have the most mature SDKs and by far the most examples to copy from.
The one case where language choice matters on its own: Ruby and PHP have no SDK under
modelcontextprotocol, so you are relying on community ports whose currency you
should check before building on them.
Tool descriptions decide whether the agent behaves, and no SDK writes those for you. They are read by the model rather than by your team, and they are re-sent on every request — so they are both the accuracy problem and the cost problem. Every page here ends in the same place for that reason.
Everything here is for the person building the server. MCP Showcase is for everyone else: point it at any MCP endpoint and it produces a live playground with documentation for every tool, so evaluating your server takes a click rather than a checkout and a build.