io.github.cyanheads/clinicaltrialsgov-mcp-server MCP Server

Name: io.github.cyanheads/clinicaltrialsgov-mcp-server MCP Server
Author: io.github.cyanheads

io.github.cyanheads/clinicaltrialsgov-mcp-server

Repository Registry

What is the io.github.cyanheads/clinicaltrialsgov-mcp-server MCP server?

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

How to install io.github.cyanheads/clinicaltrialsgov-mcp-server

Copy-paste configuration for popular MCP clients.

transport: stdio

Config generated by PluginBench — verify against the source before use.

Environment / auth

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').
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'.

Claude Desktop

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "clinicaltrialsgov-mcp-server": {
      "command": "bun",
      "args": [
        "-y",
        "clinicaltrialsgov-mcp-server",
        "run",
        "start:stdio"
      ],
      "env": {
        "CT_API_BASE_URL": "<YOUR_CT_API_BASE_URL>",
        "CT_REQUEST_TIMEOUT_MS": "<YOUR_CT_REQUEST_TIMEOUT_MS>",
        "CT_MAX_PAGE_SIZE": "<YOUR_CT_MAX_PAGE_SIZE>",
        "MCP_LOG_LEVEL": "<YOUR_MCP_LOG_LEVEL>",
        "MCP_HTTP_HOST": "<YOUR_MCP_HTTP_HOST>",
        "MCP_HTTP_PORT": "<YOUR_MCP_HTTP_PORT>",
        "MCP_HTTP_ENDPOINT_PATH": "<YOUR_MCP_HTTP_ENDPOINT_PATH>",
        "MCP_AUTH_MODE": "<YOUR_MCP_AUTH_MODE>"
      }
    }
  }
}

Cursor

~/.cursor/mcp.json

{
  "mcpServers": {
    "clinicaltrialsgov-mcp-server": {
      "command": "bun",
      "args": [
        "-y",
        "clinicaltrialsgov-mcp-server",
        "run",
        "start:stdio"
      ],
      "env": {
        "CT_API_BASE_URL": "<YOUR_CT_API_BASE_URL>",
        "CT_REQUEST_TIMEOUT_MS": "<YOUR_CT_REQUEST_TIMEOUT_MS>",
        "CT_MAX_PAGE_SIZE": "<YOUR_CT_MAX_PAGE_SIZE>",
        "MCP_LOG_LEVEL": "<YOUR_MCP_LOG_LEVEL>",
        "MCP_HTTP_HOST": "<YOUR_MCP_HTTP_HOST>",
        "MCP_HTTP_PORT": "<YOUR_MCP_HTTP_PORT>",
        "MCP_HTTP_ENDPOINT_PATH": "<YOUR_MCP_HTTP_ENDPOINT_PATH>",
        "MCP_AUTH_MODE": "<YOUR_MCP_AUTH_MODE>"
      }
    }
  }
}

Windsurf

~/.codeium/windsurf/mcp_config.json

{
  "mcpServers": {
    "clinicaltrialsgov-mcp-server": {
      "command": "bun",
      "args": [
        "-y",
        "clinicaltrialsgov-mcp-server",
        "run",
        "start:stdio"
      ],
      "env": {
        "CT_API_BASE_URL": "<YOUR_CT_API_BASE_URL>",
        "CT_REQUEST_TIMEOUT_MS": "<YOUR_CT_REQUEST_TIMEOUT_MS>",
        "CT_MAX_PAGE_SIZE": "<YOUR_CT_MAX_PAGE_SIZE>",
        "MCP_LOG_LEVEL": "<YOUR_MCP_LOG_LEVEL>",
        "MCP_HTTP_HOST": "<YOUR_MCP_HTTP_HOST>",
        "MCP_HTTP_PORT": "<YOUR_MCP_HTTP_PORT>",
        "MCP_HTTP_ENDPOINT_PATH": "<YOUR_MCP_HTTP_ENDPOINT_PATH>",
        "MCP_AUTH_MODE": "<YOUR_MCP_AUTH_MODE>"
      }
    }
  }
}

VS Code

.vscode/mcp.json

{
  "servers": {
    "clinicaltrialsgov-mcp-server": {
      "type": "stdio",
      "command": "bun",
      "args": [
        "-y",
        "clinicaltrialsgov-mcp-server",
        "run",
        "start:stdio"
      ],
      "env": {
        "CT_API_BASE_URL": "<YOUR_CT_API_BASE_URL>",
        "CT_REQUEST_TIMEOUT_MS": "<YOUR_CT_REQUEST_TIMEOUT_MS>",
        "CT_MAX_PAGE_SIZE": "<YOUR_CT_MAX_PAGE_SIZE>",
        "MCP_LOG_LEVEL": "<YOUR_MCP_LOG_LEVEL>",
        "MCP_HTTP_HOST": "<YOUR_MCP_HTTP_HOST>",
        "MCP_HTTP_PORT": "<YOUR_MCP_HTTP_PORT>",
        "MCP_HTTP_ENDPOINT_PATH": "<YOUR_MCP_HTTP_ENDPOINT_PATH>",
        "MCP_AUTH_MODE": "<YOUR_MCP_AUTH_MODE>"
      }
    }
  }
}

Claude Code

claude mcp add clinicaltrialsgov-mcp-server --env CT_API_BASE_URL=<YOUR_CT_API_BASE_URL> --env CT_REQUEST_TIMEOUT_MS=<YOUR_CT_REQUEST_TIMEOUT_MS> --env CT_MAX_PAGE_SIZE=<YOUR_CT_MAX_PAGE_SIZE> --env MCP_LOG_LEVEL=<YOUR_MCP_LOG_LEVEL> --env MCP_HTTP_HOST=<YOUR_MCP_HTTP_HOST> --env MCP_HTTP_PORT=<YOUR_MCP_HTTP_PORT> --env MCP_HTTP_ENDPOINT_PATH=<YOUR_MCP_HTTP_ENDPOINT_PATH> --env MCP_AUTH_MODE=<YOUR_MCP_AUTH_MODE> -- bun -y clinicaltrialsgov-mcp-server run start:stdio