mcp server

catalyst-mcp

colorcatalyst/catalyst-mcpcommunitylistedunreviewed

Set up

Hosted by its author. Add the URL to your agent — nothing to install.

~/Library/Application Support/Claude/claude_desktop_config.json

Settings → Connectors → Add custom connector

Name: catalyst-mcp
URL:  https://catalystproject.ai/mcp

same format Cursor, GitHub Copilot CLI, Junie, JetBrains AI Assistant, Augment (Auggie CLI), Factory Droid, Kiro, Devin CLI +12

Values in angle brackets are placeholders. Restart Claude Desktop after editing its config.Claude Desktop docs

README

synced Oct 21, 2026

Catalyst evidence graph — MCP server, plugins and extensions

Catalyst is a curated evidence graph of what compounds, supplements, nutrients and foods have been shown to do in the human body. This repository connects it to the assistants and editors people already use. The server itself is hosted; everything here only tells a client where it is.

Server: https://catalystproject.ai/mcp — MCP over Streamable HTTP, read-only, no account, no key. Registry name: ai.catalystproject/evidence-graph Setup for every client, the tool list and limits: https://catalystproject.ai/connect

What an assistant gets

Findings for a compound or an outcome. Every finding carries an evidence_strength — strong, moderate, limited, very_limited or insufficient — computed from the study behind it, never set by hand, plus the verbatim sentence it was drawn from, the paper, the population and dose, and a permalink to check it.
Relations from reference databases (targets, pathways, reactions), each labelled as a hypothesis rather than a reported result.

Evidence strength describes how well the evidence supports a finding. It is not a recommendation, and nothing here is medical advice. No tool returns a product, a price or a link to buy anything, and no tool ranks what to take.

Changed in 0.2.0 (ADR-0103): tool results report evidence_strength as a named level and never a letter, and get_findings takes an evidence_strength floor. The grade field and the grade argument are gone; a call that still sends grade gets an error naming the replacement.

Install

Client	How
Claude (web, desktop)	Settings → Connectors → Add custom connector → `https://catalystproject.ai/mcp`
ChatGPT	Developer mode → add a custom app/connector with `https://catalystproject.ai/mcp`
Claude Code (plugin, adds the server and a skill for presenting evidence strength)	`/plugin marketplace add colorcatalyst/catalyst-mcp` then `/plugin install catalyst@catalyst`
Claude Code (server only)	`claude mcp add --transport http catalyst https://catalystproject.ai/mcp`
VS Code / GitHub Copilot	The Catalyst Evidence Graph extension (VSIX on the releases page), the one-click link on /connect, or `.vscode/mcp.json` below
Cursor	One-click install, or `~/.cursor/mcp.json` below
Gemini CLI	`gemini extensions install https://github.com/colorcatalyst/catalyst-mcp`
Anything else	the JSON below

{ "mcpServers": { "catalyst": { "url": "https://catalystproject.ai/mcp" } } }

VS Code's own file takes a slightly different shape:

{ "servers": { "catalyst": { "type": "http", "url": "https://catalystproject.ai/mcp" } } }

In this repository

Path	What it is
`server.json`	The entry in the official MCP registry
`.claude-plugin/marketplace.json`, `plugins/catalyst/`	A Claude Code plugin marketplace with one plugin: the server and an `evidence-strength` skill
`gemini-extension.json`, `GEMINI.md`	A Gemini CLI extension
`vscode/`	A VS Code extension that registers the server with Copilot's agent mode

Privacy

The server stores no queries and has no accounts. Rate limits count calls per minute against the client's name and a keyed hash of the network address, never the address itself. Full notice: https://catalystproject.ai/privacy.

Contact

Questions, or something an assistant got wrong from this graph: hello@catalystproject.ai

The code in this repository is MIT-licensed. The graph's content carries the terms on https://catalystproject.ai/terms and per-source licences on https://catalystproject.ai/attribution.