# ClinicalTrials.gov MCP Server

> Use this tool when you need to search and retrieve clinical trial information, solving problems such as identifying relevant studies, finding trial locations, and accessing study results. It takes search queries as input and outputs detailed trial information, including eligibility criteria and locations. Use it to inform medical research, clinical decision-making, and patient care across 220+ countries.

Canonical page: https://skillsregistry.net/skills/aafjes-mcp-clinicaltrials-gov  
JSON: https://api.skillsregistry.net/v1/skills/aafjes-mcp-clinicaltrials-gov

## Description

Enables searching and retrieving information from the ClinicalTrials.gov database of over 400,000 clinical studies, including trial details, eligibility criteria, locations, and results across 220+ countries.

## Trust

- **Trust score (0–1):** 1.00
- **Verification tier:** verified
- **Last scanned:** 2026-09-28

## Facts

- **Version:** 1.0.0
- **Skill type:** atomic
- **Execution layer:** mcp-remote
- **Runtime environment:** api
- **Category:** database
- **Updated:** 2026-09-28

## Source

- **Source listing:** [Glama](https://glama.ai/mcp/servers/am8mhze0rd)
- **Repository:** <https://github.com/aafjes/mcp-clinicaltrials.gov>

## Use it

Resolve this record through the SkillsRegistry MCP server (no auth, read-only):

```
claude mcp add --transport http --scope user skillsregistry https://api.skillsregistry.net/mcp
```

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_skill",
    "arguments": {
      "slug": "aafjes-mcp-clinicaltrials-gov"
    }
  }
}
```

REST: `GET https://api.skillsregistry.net/v1/skills/aafjes-mcp-clinicaltrials-gov` · pull for local use: `GET https://api.skillsregistry.net/v1/skills/aafjes-mcp-clinicaltrials-gov/pull`

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SkillsRegistry indexes agent skills from public registries and GitHub. Skills we have analysed are scanned with Circle-IR and scored on six dimensions; each listing states its scan coverage. More: https://skillsregistry.net/llms.txt