Raras MCP MCP server

The Raras MCP server exposes a knowledge graph of rare diseases, enabling AI agents to query 10,468 diseases, HPO phenotypes, genes, SUS coverage, clinical trials, and scientific papers with traceable identifiers.

Endpoint and access

No sign-in: your client connects and lists tools immediately, with no account or key.

No sign-inEndpoint checked 2026-10-05Operated by Raras

MCP endpoint (Streamable HTTP)

https://raras.org/api/mcp

Vendor documentation

What you can do with it

Search rare diseases by name or symptoms
Check SUS medication coverage for specific conditions
Find active clinical trials in Brazil
Retrieve clinical details and phenotypes for a disease

Tools advertised by the last live check:

search_diseases
get_disease_detail
find_diseases_by_phenotypes
search_phenotypes
get_sus_coverage
find_reference_centers
find_active_trials
find_similar_diseases
find_phenotypically_similar
get_graph_stats
search_papers_semantic
find_papers_for_disease
analyze_clinical_case
get_schema
explain_relation
get_literature_relations
get_hypotheses
get_research_log
get_recent_updates
get_evidence

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers a Streamable HTTP server. Use --scope project to write .mcp.json for the repo.

Claude Code configuration

claude mcp add --transport http raras-mcp https://raras.org/api/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).

Codex configuration

codex mcp add raras-mcp --url https://raras.org/api/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable raras-mcp in your MCP settings.

Cursor configuration

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

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure). The type must be streamableHttp for a remote HTTP server.

Cline configuration

{
  "mcpServers": {
    "raras-mcp": {
      "type": "streamableHttp",
      "url": "https://raras.org/api/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start raras-mcp and inspect its tools.

VS Code configuration

{
  "servers": {
    "raras-mcp": {
      "type": "http",
      "url": "https://raras.org/api/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.

Gemini CLI configuration

gemini mcp add --transport http raras-mcp https://raras.org/api/mcp

Claude Desktop

Merge this into claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\), then restart Claude Desktop.

Claude Desktop configuration

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

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.

Windsurf configuration

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

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