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clinicaltrialsgov-mcp-server

Search ClinicalTrials.gov — find studies, retrieve results, match patients to eligible trials.

TypeScript Remote

★ 95 stars Last pushed 2026-09-22 License: Apache-2.0

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Review any command before running it. Package names and URLs come from the server's own registry entry.

Remote (streamable-http)

https://clinicaltrials.caseyjhand.com/mcp Reachable (checked 2026-09-24)

Claude Code:

claude mcp add --transport http clinicaltrialsgov-mcp-server https://clinicaltrials.caseyjhand.com/mcp

Or add to your MCP client config:

{
  "mcpServers": {
    "clinicaltrialsgov-mcp-server": {
      "url": "https://clinicaltrials.caseyjhand.com/mcp"
    }
  }
}

Package (npm 2.9.10)

npx -y clinicaltrialsgov-mcp-server@2.9.10

Or add to your MCP client config:

{
  "mcpServers": {
    "clinicaltrialsgov-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "clinicaltrialsgov-mcp-server@2.9.10"
      ],
      "env": {
        "CT_API_BASE_URL": "<YOUR_VALUE>",
        "CT_REQUEST_TIMEOUT_MS": "<YOUR_VALUE>",
        "CT_MAX_PAGE_SIZE": "<YOUR_VALUE>",
        "MCP_LOG_LEVEL": "<YOUR_VALUE>"
      }
    }
  }
}

CT_API_BASE_URL — ClinicalTrials.gov API base URL.
CT_REQUEST_TIMEOUT_MS — Per-request timeout in milliseconds.
CT_MAX_PAGE_SIZE — Maximum page size cap.
MCP_LOG_LEVEL — Sets the minimum log level for output (e.g., 'debug', 'info', 'warn').

This server takes extra arguments — see its repository.

Package (npm 2.9.10)

Package: npm clinicaltrialsgov-mcp-server

CT_API_BASE_URL — ClinicalTrials.gov API base URL.
CT_REQUEST_TIMEOUT_MS — Per-request timeout in milliseconds.
CT_MAX_PAGE_SIZE — Maximum page size cap.
MCP_HTTP_HOST — The hostname for the HTTP server.
MCP_HTTP_PORT — The port to run the HTTP server on.
MCP_HTTP_ENDPOINT_PATH — The endpoint path for the MCP server.
MCP_AUTH_MODE — Authentication mode to use: 'none', 'jwt', or 'oauth'.
MCP_LOG_LEVEL — Sets the minimum log level for output (e.g., 'debug', 'info', 'warn').