ouvreboite/openapi-to-mcp

Overview

Converts OpenAPI specifications into MCP servers, enabling AI assistants to directly call your API endpoints through the Model Context Protocol. Implemented in C#, it exposes any OpenAPI-compliant API as an MCP server with minimal configuration.

Best for

Best for
Developers wanting to quickly connect their OpenAPI-defined APIs to MCP-compatible AI agents

Use cases

• Expose existing REST APIs to AI assistants via MCP
• Quickly create MCP servers from OpenAPI specs
• Integrate AI models with your API without custom glue code

How to use

Install

dotnet tool install --global openapi-to-mcp

Tools exposed

• openapi-to-mcp

Example client config

{\n  "mcpServers": {\n    "petstore": {\n      "command": "openapi-to-mcp",\n        "args": [\n          "https://petstore3.swagger.io/api/v3/openapi.json"\n        ]\n    }\n  }\n}

Notes

Converts OpenAPI specifications into MCP servers, enabling AI assistants to directly call your API endpoints through the Model Context Protocol. Implemented in C#, it exposes any OpenAPI-compliant API as an MCP server with minimal configuration.

33 stars on GitHub. Last updated 2025-07-15. Licensed MIT.

Use cases

• Expose existing REST APIs to AI assistants via MCP
• Quickly create MCP servers from OpenAPI specs
• Integrate AI models with your API without custom glue code

Pros

• Automatic generation from OpenAPI specs reduces manual work
• Uses standard MCP protocol for broad AI tool compatibility
• Simple setup with existing OpenAPI definitions

Cons

• Limited to OpenAPI spec requirements; may not handle non-standard APIs
• Small community (33 stars) with potentially limited support
• C# dependency may not suit all environments

Indexed from awesome-mcp-servers-punkpeye and enriched against its public facts.