Building an MCP server from scratch means mapping API operations to tools, validating inputs, managing authentication, hosting infrastructure, and keeping everything in sync as your API evolves. 0mcp automates that workflow so you can publish an MCP server directly from your OpenAPI specification.
Use what you already have
Your OpenAPI 3.x or Swagger 2.0 document already defines your API’s endpoints, parameters, request bodies, and responses. 0mcp uses that specification to generate MCP capabilities automatically, eliminating repetitive manual work.
Stay in control
You decide exactly what AI clients can access.
Select which API operations become tools, customize their names and descriptions, pause serving when needed, and publish versioned releases. Draft changes remain private until you choose to publish them.
Connected clients use only the published version. You can prepare and review draft changes without affecting them.
Keep credentials with the caller
0mcp doesn’t require you to store a shared upstream API secret.
Instead, MCP clients provide the required Bearer token or API key at request time, and 0mcp securely passes those credentials through to your API.
Monitor everything
Track how your MCP server is performing without managing server infrastructure.
The dashboard provides usage metrics, request history, errors, response times, payload sizes, and version history, making it easy to monitor activity and troubleshoot issues. 
