clinicaltrialsgov-mcp-server

Name: clinicaltrialsgov-mcp-server
Author: cyanheads

Community

MCP server by cyanheads · updated 5 days ago · ★ 99 · 911 downloads a week

Score 81

Search ClinicalTrials.gov: find studies, retrieve results, match patients to candidate trials. clinicaltrialsgov-mcp-server is a community project by cyanheads, not verified by a company domain.

Install Add to Cursor Add to VS Code GitHub

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Works withClaude Code Claude Desktop Cursor Codex Gemini CLI VS Code Windsurf Antigravity CLI

Maintenance

Last commit 5 days ago

Licence

Apache-2.0: permissive, fine for commercial use

Quality

Clear description, published package or server URL, 99 stars, original repository

Security

No risky patterns in the files we checked

What you need

Setting	Needed	What it is
`CT_API_BASE_URL`Environment variable	Optional	ClinicalTrials.gov API base URL. Default: `https://clinicaltrials.gov/api/v2`
`CT_REQUEST_TIMEOUT_MS`Environment variable	Optional	Per-request timeout in milliseconds. Default: `30000`
`CT_MAX_PAGE_SIZE`Environment variable	Optional	Maximum page size cap. Default: `200`
`MCP_LOG_LEVEL`Environment variable	Optional	Sets the minimum log level for output (e.g., 'debug', 'info', 'warn'). Default: `info`

From the publisher's entry in the official MCP Registry. Required settings are already in the install config below as placeholders.

Install clinicaltrialsgov-mcp-server

Built from the published package, never by AI

claude mcp add clinicaltrialsgov-mcp-server -- npx -y clinicaltrialsgov-mcp-server

Run in your terminal. Add --scope user to use it in every project.

Step-by-step: install clinicaltrialsgov-mcp-server in Claude Code

{
  "mcpServers": {
    "clinicaltrialsgov-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "clinicaltrialsgov-mcp-server"
      ]
    }
  }
}

Settings, Developer, Edit config. Paste into claude_desktop_config.json and restart.

Step-by-step: install clinicaltrialsgov-mcp-server in Claude Desktop

{
  "mcpServers": {
    "clinicaltrialsgov-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "clinicaltrialsgov-mcp-server"
      ]
    }
  }
}

Add to ~/.cursor/mcp.json (all projects) or .cursor/mcp.json (this project).

Step-by-step: install clinicaltrialsgov-mcp-server in Cursor

{
  "servers": {
    "clinicaltrialsgov-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "clinicaltrialsgov-mcp-server"
      ]
    }
  }
}

Add to .vscode/mcp.json. VS Code uses "servers", not "mcpServers".

Step-by-step: install clinicaltrialsgov-mcp-server in VS Code

codex mcp add clinicaltrialsgov-mcp-server -- npx -y clinicaltrialsgov-mcp-server

Step-by-step: install clinicaltrialsgov-mcp-server in Codex

{
  "mcpServers": {
    "clinicaltrialsgov-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "clinicaltrialsgov-mcp-server"
      ]
    }
  }
}

Add to ~/.gemini/config/mcp_config.json (all projects) or .agents/mcp_config.json (this project).

Step-by-step: install clinicaltrialsgov-mcp-server in Antigravity CLI

gemini mcp add clinicaltrialsgov-mcp-server npx -y clinicaltrialsgov-mcp-server

Gemini CLI was replaced by Antigravity CLI in June 2026 and remains only for enterprise licences and paid API keys.

Step-by-step: install clinicaltrialsgov-mcp-server in Gemini CLI

MCP servers run with your permissions and can read what you give them access to. Some need an API key: check the README and add it under env in the clinicaltrialsgov-mcp-server block.

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Security check

No download-and-run commands, hidden instructions or signs of sending keys out were found.

Checked automatically: README.md, package.json. This looks for known risky patterns and is not a full audit. How grades work

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clinicaltrialsgov-mcp-server: common questions

How do I install clinicaltrialsgov-mcp-server?

In Claude Code run claude mcp add clinicaltrialsgov-mcp-server -- npx -y clinicaltrialsgov-mcp-server. For Claude Desktop, Cursor and VS Code, paste the config shown above and restart. See the install guides.

Is clinicaltrialsgov-mcp-server the official server?

clinicaltrialsgov-mcp-server is a community project by cyanheads, not verified by a company domain.

Is clinicaltrialsgov-mcp-server free?

The code is published under the Apache-2.0 licence. The service it connects to may have its own pricing.

Is clinicaltrialsgov-mcp-server safe to use?

It scores 81 of 100. Grades: maintenance A, licence A, quality B. Security check: grade A, no risky patterns found in the files checked. Review the code before you install. How grades work.

What are alternatives to clinicaltrialsgov-mcp-server?

Similar MCP servers: exa, Agent Skills Search Server, brave, Atlassian Rovo MCP Server.

Does clinicaltrialsgov-mcp-server work with ChatGPT?

Yes. Add its server URL in ChatGPT as a custom connector. See MCP in ChatGPT.