Koskamo

OpenCancer MCP

An MCP server that provides NCCN-grounded cancer information, helps find recruiting clinical trials near a user's location, and facilitates expert case reviews. It answers questions about diagnosis, tests, treatment options, and side effects, serving as an educational tool for patients and caregivers without providing medical advice.

Visit OpenCancer

Endpoint and access

No sign-in to connect and list tools. Individual tools may still need a vendor account, credentials, or permissions; check the documented prerequisites.

OpenCancer MCP logo, by OpenCancerVendor evidenceStreamable HTTPNo sign-inEndpoint checked 2026-10-26Operated by OpenCancer
You need:Sign in to Claude if it asks.Claude's free plan allows one custom connector.
MCP endpoint (Streamable HTTP)
https://opencancer.ai/api/mcp
Vendor documentation

What you can do with it

  • Answer cancer questions with sources like diagnosis and treatment options
  • Find recruiting clinical trials near a specific location
  • Request an expert review of a patient's case

Source and maintenance

Vendor evidenceRegistry 2.0.0
mcp-registry: ai.opencancer/opencancer@2.0.0Project website

Tools

Reported by the attributed source; not independently observed by Koskamo.

No tool definitions available.

Maintenance history

Public check and source-refresh events. Editorial and ownership records remain private.

  • · registry · passed · metadata changed · Source metadata updated
  • · backfill · recorded · Pre-expansion baseline; unobserved rich metadata remains unknown

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 the remote server. Use --scope project to write .mcp.json for the repo.
Claude Code configuration
claude mcp add --transport http opencancer-mcp https://opencancer.ai/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 opencancer-mcp --url https://opencancer.ai/api/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable opencancer-mcp in your MCP settings.
Cursor configuration
{
  "mcpServers": {
    "opencancer-mcp": {
      "url": "https://opencancer.ai/api/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure).
Cline configuration
{
  "mcpServers": {
    "opencancer-mcp": {
      "type": "streamableHttp",
      "url": "https://opencancer.ai/api/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start opencancer-mcp and inspect its tools.
VS Code configuration
{
  "servers": {
    "opencancer-mcp": {
      "type": "http",
      "url": "https://opencancer.ai/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 opencancer-mcp https://opencancer.ai/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": {
    "opencancer-mcp": {
      "url": "https://opencancer.ai/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": {
    "opencancer-mcp": {
      "serverUrl": "https://opencancer.ai/api/mcp"
    }
  }
}

Let your agent find its tools

Find servers like OpenCancer MCP from your agent. Add Koskamo once to search the index for endpoints, access requirements, and client setup. Public discovery needs no key.

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Do you run OpenCancer MCP?

Prove ownership with a DNS record, a well-known file, or your Official MCP Registry entry, and your edits publish immediately. Proofs are re-checked weekly; admins can still hide or remove a listing.

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