open-mcp

# OpenMCP https://www.open-mcp.org OpenMCP is both: 1. a standard for converting web APIs into MCP servers 2. an open source registry of servers which follow the standard Each OpenMCP server gives MCP clients the ability to make requests to a particular web API in a token-efficient way. Together the servers in the registry represent a broad range of services, empowering the underlying client LLMs to fetch data and perform actions on behalf of their users across many domains. ## Contents - [Creating a server](#creating-a-server) - [Adding OpenMCP servers to MCP clients](#adding-openmcp-servers-to-mcp-clients) - [Converting web API -> OpenMCP](#converting-web-api---openmcp) ## Creating a server https://www.open-mcp.org/servers/creating-a-server ## Adding OpenMCP servers to MCP clients ### Remote hosting ... ### Local hosting <div> <a href="https://www.loom.com/share/aa26fed41f084ff1bd115436f9d799dd"> <p>Local hosting demo - watch video</p> </a> <a href="https://www.loom.com/share/aa26fed41f084ff1bd115436f9d799dd"> <img style="max-width:300px;" src="https://cdn.loom.com/sessions/thumbnails/aa26fed41f084ff1bd115436f9d799dd-9815ccb91b155b9d-full-play.gif"> </a> </div> #### Requirements: - Node.js v18 or later (includes npx and npm) #### Claude desktop ```bash npx @open-mcp/config add {server-id} \ ~/Library/Application\ Support/Claude/claude_desktop_config.json \ --ENV_VAR=abc123 ``` Now restart Claude desktop to load the tools. #### Cursor Run this from the root of your project directory or, to add to all cursor projects, run it from your home directory `~`. ```bash npx @open-mcp/config add {server-id} \ .cursor/mcp.json \ --ENV_VAR=abc123 ``` Now go to `Cursor > Settings > Cursor Settings` then click `MCP` to ensure the server is enabled. #### Other clients ```bash npx @open-mcp/config add {server-id} \ /path/to/config.json \ --ENV_VAR=abc123 ``` #### Alternatives If you don't want to use the CLI you can use `npm` to install the package manually, then add a `node` command to your client config with an absolute path to `dist/index.js`. See the individual server READMEs for more details. ## Converting web API -> OpenMCP ### REST `openapi.yaml` / `openapi.json` ... ### gRPC `service.proto` ... ### JSON-RPC `openrpc.json` ... ### GraphQL `schema.gql` ... ### SOAP `service.wsdl` ... ### PostgREST `schema.sql` ...