Raras

Disease Twin — Brazil's rare-disease knowledge graph (10,468) over MCP. Source-grounded, PT-BR.

Quick Install

Automated & IDE Setup

Copy the AI prompt to install this server into Claude Code, Cursor, or another agent — or use 1-click editor setup below.

Add to Cursor Add to VS Code

Manual Client & Custom JSON ConfigExpand JSON ▾

Client Config & Setup

Remote HTTP

Choose your client or environment

Target File:~/Library/Application Support/Claude/claude_desktop_config.json

claude_desktop_config.json

{
  "mcpServers": {
    "raras": {
      "url": "https://raras.org/api/mcp"
    }
  }
}

💡 Paste the JSON block into your client's configuration file under mcpServers, then restart the application.

Documentation Overview

Raras Disease Twin — MCP Server

Brazilian rare-disease knowledge graph (10,468 diseases) exposed via the Model Context Protocol (MCP). Each disease is an addressable Disease Twin (disease://{orphaCode}): genes, HPO phenotypes, SUS coverage, clinical trials, literature-mined treatments, repurposing hypotheses, and grounded multi-hop reasoning — PT-BR first, source-grounded, never diagnoses.

Connect (no install)

Remote endpoint: https://raras.org/api/mcp (Streamable HTTP, public, read-only)
Claude Code: claude mcp add --transport http raras https://raras.org/api/mcp
claude.ai / Desktop: Settings → Connectors → Add custom connector → paste the URL
Docs: https://raras.org/mcp

Skill

SKILL.md is an installable Claude Skill — drop it in .claude/skills/raras-disease-twin/.

License

Data: CC-BY-4.0 · Code: MIT · https://raras.org

Read the full README →View source on GitHub →

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Frequently Asked Questions about Raras

Add the following block to your claude_desktop_config.json under mcpServers: "mcpServers": { "raras": { "command": "npx", "args": ["-y", "raras"] } }

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Technical Specs & Signals

CategoryDeveloper Tools

36Quality signal: Fair · 36/100How this signal is calculated ▾

Server availabilityNot measured

Not scored for repo-hosted servers — we can't reach the running server, only its GitHub page. Hosted MCP endpoints are health-checked live.

Verified ownership10/20

Documentation & tools16/30

Adoption & activity1/15

Community engagement0/10

A guidance signal from public completeness & health data — not a user rating. New listings start lower and rise as they add docs, get verified, and grow adoption. Signals we can't observe for a listing are skipped, not counted against it.

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More in 💻 Developer Tools →Best MCP servers for Developers →Alternatives to Raras →Install in Claude Desktop Install in Cursor Install in VS Code