OpenApi

About

OpenApiMcpNet is an open-source .NET library designed to streamline the creation of Model Context Protocol (MCP) servers by leveraging existing web APIs defined with an OpenAPI (Swagger) specification. It acts as an intelligent bridge, automatically transforming OpenAPI operations into MCP-compatible tools. This powerful capability enables AI assistants and Large Language Models to seamlessly interact with virtually any REST API, abstracting away the underlying complexity of API integration through an intuitive Model Context Protocol server. Developers can quickly build functional MCP servers with minimal manual wiring, enhancing the capabilities of AI-driven applications.

Key Features

• Built-in Authentication Support for OAuth 1.0a and OAuth 2.0
• Automatic Tool Generation from OpenAPI operations
• Extensible Architecture for custom authentication and API callers
• Full OpenAPI Support for all parameter types and request bodies
• Fluent API for simple and chainable configuration
• 2 GitHub stars

Use Cases

• Automating the creation of MCP tools for API integration with minimal manual effort
• Enabling AI assistants and LLMs to interact with a wide range of web services
• Building MCP servers from existing REST APIs defined by OpenAPI specifications