loopwork-ai/emcee
A tool that provides a Model Context Protocol (MCP) server for any web application with an OpenAPI specification.
About loopwork-ai/emcee
emcee provides a Model Context Protocol (MCP) server from an OpenAPI specification given as a file path or URL. Compatible clients such as Claude Desktop can then use operations from that web API as tools, for example by pointing emcee at the weather.gov OpenAPI document.
It uses standard input/output with JSON-RPC 2.0, supports bearer, basic, and raw Authorization headers supplied directly or as 1Password references, and includes flags for retries, requests per second, timeout, and logging. It can be installed with Homebrew, an installer script for Linux and macOS, Docker images, or built from source requiring Go 1.24 or later.
Key features
- Generates MCP server from OpenAPI spec file or URL
- Connects Claude Desktop and other apps to external tools
- Supports bearer, basic, and raw Authorization header authentication
- Accepts authentication values directly or as 1Password references
- Configurable retries, requests-per-second limit, and timeout settings
- Communicates over stdio using JSON-RPC 2.0 wire format
Best for: Developers with an OpenAPI-described web service who want to make it usable from MCP-compatible clients without implementing a separate MCP server.
Good for
- Works directly from an existing OpenAPI file or URL
- Supports bearer, basic, and raw Authorization header methods
- Distributed as prebuilt Linux and macOS releases, Docker images, and source
Watch out for
- Requires the target web application to have an OpenAPI specification
- Building from source requires Go 1.24 or later
loopwork-ai/emcee at a glance
- Website
- github.com/mattt/emcee
- Category
- Development › APIs & Databases
- Type
- Open-source project
- Pricing
- Not confirmed. Check the site
- Platforms
- macOS
- Open source
- Yes · Source code
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
Guides for APIs & Databases
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loopwork-ai/emcee FAQ
How do I connect Claude Desktop to an API with emcee?
Install emcee, edit claude_desktop_config.json to add an mcpServers entry with command emcee and the OpenAPI URL in args, save, then quit and reopen Claude.
What authentication options are available?
Bearer token, basic auth, and raw Authorization header values, provided directly or as 1Password secret references.
What command-line options does emcee accept?
It accepts a spec path or URL plus flags for auth, retries (default 3), requests per second, timeout (default 1m0s), and silent or verbose logging.
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