Oatpp MCP Server

What is oatpp-mcp?

oatpp-mcp is an implementation of Anthropic’s Model Context Protocol (MCP) for the Oat++ C++ web framework. It allows developers to create MCP servers that can automatically generate tools from an ApiController, enabling LLMs to query the API. It is intended for Oat++ users who want to integrate with AI assistants via the MCP standard.

How to use oatpp-mcp?

Build and install the module after installing the main oatpp module, then include it in your project. Use the oatpp::mcp::Server class to add prompts, resources, and tools, and serve via STDIO (server.stdioListen()) or HTTP SSE (attach the SSE controller to your HTTP server router). Redirect Oat++ logging to a different stream when using STDIO.

Key features of oatpp-mcp

• Autogenerates MCP tools from ApiController for LLM querying.
• Supports STDIO and HTTP SSE transport.
• Implements Prompts, Resources, and Tools per the MCP specification.
• Integrates directly with the Oat++ web framework.

Use cases of oatpp-mcp

• Expose existing Oat++ REST API endpoints as MCP tools for LLM consumption.
• Build an MCP server with custom prompts, resources, and tools for AI workflows.
• Connect LLMs to C++ backend services with minimal manual tool definition.