Developer Docs

Build on SupStack’s evidence-based supplement data — 550 supplements, 58,290+ peer-reviewed studies, and 36 health goals — through a free REST API, an open-source CLI, and an MCP server for AI agents. One source of truth, four surfaces.

REST API

Read-only JSON endpoints for supplements, safety, recommendations, comparisons, and research. CORS-enabled, free API key.

API reference

CLI

An open-source terminal client over the API — research, search, compare, studies, interactions, and a local stack. Install from npm.

CLI docs

MCP server

The same capabilities as Model Context Protocol tools, so Claude Desktop / Claude Code and other agents can call SupStack directly.

Set up MCP

Quick start

No account needed for read-only access. Anonymous requests are rate-limited to 60/min per IP.

# REST
curl https://supstack.me/api/v1/supplements/magnesium

# CLI
npx -y @supstack/cli research magnesium

SupStack provides evidence-based information for general wellness and education. It is not medical advice and is not intended to diagnose, treat, cure, or prevent any disease.