Who maintains Clinicaltrialsgov MCP Server?

Clinicaltrialsgov MCP Server is maintained by cyanheads, which publishes 131 MCP servers (2112 total versions) tracked on MCP Toplist.

Is Clinicaltrialsgov MCP Server listed on the Official MCP Registry?

Yes — Clinicaltrialsgov MCP Server is listed on the Official MCP Registry, alongside PulseMCP, Smithery and Glama.

How many versions does Clinicaltrialsgov MCP Server have?

MCP Toplist tracks 66 versions of Clinicaltrialsgov MCP Server, most recently published on Sep 3, 2026.

Where can I find the source code for Clinicaltrialsgov MCP Server?

The source code for Clinicaltrialsgov MCP Server is hosted at github.com/cyanheads/clinicaltrialsgov-mcp-server.

SERVER

Clinicaltrialsgov MCP Server

Rank #365

io.github.cyanheads/clinicaltrialsgov-mcp-server

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

66 versions

91 GitHub stars

by cyanheads (131 servers)View repository ↗Claim this server

First listed

Jun 18, 2025

Last publish date

Sep 3, 2026

OVERVIEW

Clinicaltrialsgov MCP Server is a Model Context Protocol (MCP) server published by cyanheads. It ranks #365 of 121,933 servers tracked on MCP Toplist, and its repository has 91 GitHub stars. Clinicaltrialsgov MCP Server is listed across 4 registries — Official MCP, PulseMCP, Smithery and Glama, with 66 tracked versions. It was first listed on Jun 18, 2025 and most recently updated on Sep 3, 2026.

STANDING

#365of 121,933 tracked serversTop 0.5%

Ranks ahead of 121,568 of 121,933 servers on MCP Toplist.

Recent momentum

+24GitHub stars since Apr 27 (+36%)

CONNECT

Use Clinicaltrialsgov MCP Server

No setupRuns out of the box

No credentials or required configuration declared — add it to your MCP client and go.

Remote · HTTP

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

npm package

claude mcp add clinicaltrialsgov-mcp-server -e "CT_API_BASE_URL=<your CT_API_BASE_URL>" -e "CT_REQUEST_TIMEOUT_MS=<your CT_REQUEST_TIMEOUT_MS>" -e "CT_MAX_PAGE_SIZE=<your CT_MAX_PAGE_SIZE>" -e "MCP_LOG_LEVEL=<your MCP_LOG_LEVEL>" -- npx -y clinicaltrialsgov-mcp-server run start:stdio

Replace each placeholder with your own value before saving.

npm package

claude mcp add clinicaltrialsgov-mcp-server -e "CT_API_BASE_URL=<your CT_API_BASE_URL>" -e "CT_REQUEST_TIMEOUT_MS=<your CT_REQUEST_TIMEOUT_MS>" -e "CT_MAX_PAGE_SIZE=<your CT_MAX_PAGE_SIZE>" -e "MCP_HTTP_HOST=<your MCP_HTTP_HOST>" -e "MCP_HTTP_PORT=<your MCP_HTTP_PORT>" -e "MCP_HTTP_ENDPOINT_PATH=<your MCP_HTTP_ENDPOINT_PATH>" -e "MCP_AUTH_MODE=<your MCP_AUTH_MODE>" -e "MCP_LOG_LEVEL=<your MCP_LOG_LEVEL>" -- npx -y clinicaltrialsgov-mcp-server run start:http

Replace each placeholder with your own value before saving.

Remote · HTTP

[mcp_servers.clinicaltrialsgov-mcp-server]
url = "https://clinicaltrials.caseyjhand.com/mcp"

Add to ~/.codex/config.toml.

npm package

[mcp_servers.clinicaltrialsgov-mcp-server]
command = "npx"
args = ["-y", "clinicaltrialsgov-mcp-server", "run", "start:stdio"]

[mcp_servers.clinicaltrialsgov-mcp-server.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>"

Add to ~/.codex/config.toml. Replace each placeholder with your own value before saving.

npm package

[mcp_servers.clinicaltrialsgov-mcp-server]
command = "npx"
args = ["-y", "clinicaltrialsgov-mcp-server", "run", "start:http"]

[mcp_servers.clinicaltrialsgov-mcp-server.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_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>"
MCP_LOG_LEVEL = "<your MCP_LOG_LEVEL>"

Add to ~/.codex/config.toml. Replace each placeholder with your own value before saving.

Remote · HTTP

https://clinicaltrials.caseyjhand.com/mcp

Settings → Connectors → “Add custom connector”, then paste this URL.

npm package

{
  "mcpServers": {
    "clinicaltrialsgov-mcp-server": {
      "command": "npx",
      "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>"
      }
    }
  }
}

Add to claude_desktop_config.json (Settings → Developer → Edit Config). Replace each placeholder with your own value before saving.

npm package

{
  "mcpServers": {
    "clinicaltrialsgov-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "clinicaltrialsgov-mcp-server",
        "run",
        "start:http"
      ],
      "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_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>",
        "MCP_LOG_LEVEL": "<your MCP_LOG_LEVEL>"
      }
    }
  }
}

Add to claude_desktop_config.json (Settings → Developer → Edit Config). Replace each placeholder with your own value before saving.

Remote · HTTP

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

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (per project).

npm package

{
  "mcpServers": {
    "clinicaltrialsgov-mcp-server": {
      "command": "npx",
      "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>"
      }
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (per project). Replace each placeholder with your own value before saving.

npm package

{
  "mcpServers": {
    "clinicaltrialsgov-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "clinicaltrialsgov-mcp-server",
        "run",
        "start:http"
      ],
      "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_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>",
        "MCP_LOG_LEVEL": "<your MCP_LOG_LEVEL>"
      }
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (per project). Replace each placeholder with your own value before saving.

Remote · HTTP

{
  "servers": {
    "clinicaltrialsgov-mcp-server": {
      "type": "http",
      "url": "https://clinicaltrials.caseyjhand.com/mcp"
    }
  }
}

Save as .vscode/mcp.json in your workspace.

npm package

{
  "servers": {
    "clinicaltrialsgov-mcp-server": {
      "type": "stdio",
      "command": "npx",
      "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>"
      }
    }
  }
}

Save as .vscode/mcp.json in your workspace. Replace each placeholder with your own value before saving.

npm package

{
  "servers": {
    "clinicaltrialsgov-mcp-server": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "clinicaltrialsgov-mcp-server",
        "run",
        "start:http"
      ],
      "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_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>",
        "MCP_LOG_LEVEL": "<your MCP_LOG_LEVEL>"
      }
    }
  }
}

Save as .vscode/mcp.json in your workspace. Replace each placeholder with your own value before saving.

Remote · HTTP

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

Add to ~/.codeium/windsurf/mcp_config.json.

npm package

{
  "mcpServers": {
    "clinicaltrialsgov-mcp-server": {
      "command": "npx",
      "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>"
      }
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json. Replace each placeholder with your own value before saving.

npm package

{
  "mcpServers": {
    "clinicaltrialsgov-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "clinicaltrialsgov-mcp-server",
        "run",
        "start:http"
      ],
      "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_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>",
        "MCP_LOG_LEVEL": "<your MCP_LOG_LEVEL>"
      }
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json. Replace each placeholder with your own value before saving.

Remote · HTTP

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

npm package

{
  "mcpServers": {
    "clinicaltrialsgov-mcp-server": {
      "command": "npx",
      "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>"
      }
    }
  }
}

Replace each placeholder with your own value before saving.

npm package

{
  "mcpServers": {
    "clinicaltrialsgov-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "clinicaltrialsgov-mcp-server",
        "run",
        "start:http"
      ],
      "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_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>",
        "MCP_LOG_LEVEL": "<your MCP_LOG_LEVEL>"
      }
    }
  }
}

Replace each placeholder with your own value before saving.

BADGE

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Markdown

[![MCP Toplist](https://mcptoplist.com/badge/io.github.cyanheads%2Fclinicaltrialsgov-mcp-server.svg)](https://mcptoplist.com/server/io.github.cyanheads%2Fclinicaltrialsgov-mcp-server)

HTML

<a href="https://mcptoplist.com/server/io.github.cyanheads%2Fclinicaltrialsgov-mcp-server"><img src="https://mcptoplist.com/badge/io.github.cyanheads%2Fclinicaltrialsgov-mcp-server.svg" alt="MCP Toplist: Top 1% of 121,933" /></a>

Variants: append ?metric=score or ?metric=stars to the image URL.

REGISTRIES

Listed on 4 registries

ORGANIZATION

cyanheads

Organization

cyanheads

Servers in org

131

Versions across org

2112

Other servers by cyanheads

View all cyanheads servers →

VERSIONS

Available versions (66)

Version	Published
2.9.3	Sep 3, 2026
2.9.2	Aug 21, 2026
2.9.1	Aug 18, 2026
2.9.0	Aug 18, 2026
2.8.7	Aug 18, 2026
2.8.6	Aug 18, 2026
2.8.5	Jul 26, 2026
2.8.4	Jul 26, 2026
2.8.3	Jul 26, 2026
2.8.2	Jul 9, 2026
2.8.1	Jul 9, 2026
2.8.0	Jul 1, 2026
2.7.4	Jun 21, 2026
2.7.3	Jun 20, 2026
2.7.2	Jun 14, 2026
2.7.1	Jun 14, 2026
2.7.0	Jun 11, 2026
2.6.6	Jun 11, 2026
2.6.5	Jun 8, 2026
2.6.4	Jun 5, 2026
2.6.3	Jun 5, 2026
2.6.2	Jun 4, 2026
2.6.1	Jun 2, 2026
2.6.0	Jun 2, 2026
2.5.5	Jun 2, 2026
2.5.4	May 31, 2026
2.5.3	May 30, 2026
2.5.2	May 29, 2026
2.5.1	May 26, 2026
2.5.0	May 26, 2026
2.4.12	May 23, 2026
2.4.11	May 21, 2026
2.4.10	May 21, 2026
2.4.8	May 16, 2026
2.4.7	May 10, 2026
2.4.6	May 5, 2026
2.4.5	May 4, 2026
2.4.4	May 3, 2026
2.4.3	May 3, 2026
2.4.2	Apr 27, 2026
2.4.1	Apr 24, 2026
2.4.0	Apr 24, 2026
2.3.5	Apr 23, 2026
2.3.4	Apr 21, 2026
2.3.3	Apr 21, 2026
2.3.2	Apr 21, 2026
2.3.1	Apr 21, 2026
2.3.0	Apr 20, 2026
2.1.1	Apr 13, 2026
2.1.0	Apr 4, 2026
2.0.6	Mar 30, 2026
2.0.5	Mar 28, 2026
2.0.4	Mar 28, 2026
2.0.2	Mar 28, 2026
2.0.1	Mar 28, 2026
1.9.3	Mar 23, 2026
1.9.2	Mar 9, 2026
1.9.0	Feb 28, 2026
1.8.1	Feb 28, 2026
1.5.0	Oct 15, 2025
1.4.0	Oct 2, 2025
1.3.1	Oct 2, 2025
1.3.0	Oct 2, 2025
1.2.2	Oct 2, 2025
1.2.1	Oct 2, 2025
0.1.0	Nov 25, 2024

FAQ

Frequently asked questions

Who maintains Clinicaltrialsgov MCP Server?: Clinicaltrialsgov MCP Server is maintained by cyanheads, which publishes 131 MCP servers (2112 total versions) tracked on MCP Toplist.
Is Clinicaltrialsgov MCP Server listed on the Official MCP Registry?: Yes — Clinicaltrialsgov MCP Server is listed on the Official MCP Registry, alongside PulseMCP, Smithery and Glama.
How many versions does Clinicaltrialsgov MCP Server have?: MCP Toplist tracks 66 versions of Clinicaltrialsgov MCP Server, most recently published on Sep 3, 2026.
Where can I find the source code for Clinicaltrialsgov MCP Server?: The source code for Clinicaltrialsgov MCP Server is hosted at github.com/cyanheads/clinicaltrialsgov-mcp-server.

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