About
MCP server for querying heterogeneous catalysis databases
README
MCP server for querying heterogeneous catalysis databases. Exposes reaction data, catalysts, and conditions via the Model Context Protocol.
Features
- Reaction search — query by catalyst, reactant, product, or conditions
- SQLAlchemy backend — SQLite (default) or PostgreSQL
- MCP protocol — compatible with any MCP-aware LLM client
Installation
uv pip install -e .
# With PostgreSQL support:
uv pip install -e ".[postgres]"
Usage
catapult-mcp # starts the MCP server
Dependencies
- chemdb-common — shared database models and CLI
- mcp — Model Context Protocol server framework
License
GPL-3.0-or-later — see LICENSE.
Install Catapult in Claude Desktop, Claude Code & Cursor
unyly install catapultInstalls into Claude Desktop, Claude Code, Cursor & VS Code — handles npx, uvx and build-from-source repos for you.
First time? Get the CLI: curl -fsSL https://unyly.org/install | sh
Or configure manually
Run in your terminal:
claude mcp add catapult -- uvx catapult-mcpStep-by-step: how to install Catapult
FAQ
Is Catapult MCP free?
Yes, Catapult MCP is free — one-click install via Unyly at no cost.
Does Catapult need an API key?
No, Catapult runs without API keys or environment variables.
Is Catapult hosted or self-hosted?
Self-hosted: the server runs locally on your machine via the install command above.
How do I install Catapult in Claude Desktop, Claude Code or Cursor?
Open Catapult on unyly.org, pick your client tab (Claude Desktop, Claude Code, Cursor) and press Install — the config is generated automatically, no JSON editing.
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