crank/docs/en

Crank

Crank is a self-hosted platform for turning REST API endpoints into MCP tools.

The product provides a web UI for describing an upstream REST endpoint, testing it, publishing it as a tool, and exposing it to MCP clients through an agent-scoped endpoint.

What Crank Does

• Creates REST tools from the web UI or YAML.
• Maps MCP input into REST path, query, headers, or JSON body.
• Maps REST responses into structured tool output.
• Publishes selected tools through a specific agent.
• Issues static API keys for MCP clients.
• Stores operations, versions, samples, secrets, logs, and usage in PostgreSQL.
• Runs with Docker Compose.

Community Scope

This repository contains the Community version:

• one workspace;
• one admin user;
• unlimited agents;
• REST protocol;
• MCP Streamable HTTP;
• static agent API keys;
• PostgreSQL database;
• optional Valkey or Redis for temporary coordination state.

Documentation

The main documentation is currently maintained in Russian:

• Documentation index
• Introduction
• Installation
• Quickstart
• MCP interface
• Admin API
• Runtime configuration
• Troubleshooting

License

GNU Affero General Public License v3.0 only