ExMCP Test Server

An Elixir-based MCP server for testing and experimenting with the Model Context Protocol.

An MCP (Model Context Protocol) server implementation in Elixir that provides a test implementation for experimenting with the protocol.

- JSON-RPC 2.0 compliant server implementation
- Standard MCP protocol methods supported
- Pluggable validation and middleware pipeline
- Schema-driven request/response validation
- OpenRPC specification included

- PhxJsonRpcfor the RPC layer
- ExJsonSchemafor schema validation
- Jasonfor JSON encoding/decoding

The best way to run the model is to generate a release with

and add it to to yourclaude_desktop_config.json:

{ "mcpServers": { "ex-mcp-test": { "command": "path/to/your/realease/bin/my_app", "args": [ "start" ] } } }

The server implements the following MCP methods:

initialize - Initialize the server notifications/initialized - Handle initialization notification prompts/list - List available prompts resources/list - List available resources tools/list - List available tools tools/call - Call a specific tool

The OpenRPC specification can be found inpriv/static/mcp-openrpc.json.

This project is licensed under the MIT License - see the LICENSE file for details.

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