# clinicaltrialsgov-mcp-server MCP Server

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

**Pod connected.** On 2026-09-05 the server did not respond usably (unreachable).

## At a glance

**Source code:** [Open repository](https://github.com/cyanheads/clinicaltrialsgov-mcp-server)

**Package usage:** 9,878 npm downloads in the last 30 days.

**GitHub popularity:** 91 stars on [cyanheads/clinicaltrialsgov-mcp-server](cyanheads/clinicaltrialsgov-mcp-server), recorded 2026-09-09.

## Status

Pod connected to clinicaltrialsgov-mcp-server on 2026-09-05. It did not answer, responding in 10301ms.

## Connect

Published as `clinicaltrialsgov-mcp-server` on npm. Runs locally.

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

Published as `clinicaltrialsgov-mcp-server` on npm. Runs locally.

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

A hosted endpoint at `https://clinicaltrials.caseyjhand.com/mcp`, over streamable-http. Nothing to install.

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

## Reviewed GitHub reports

**10 GitHub reports passed Pod's relevance review.** This can include external user reports, maintainer-confirmed bugs, and concrete feature gaps. It is evidence to inspect, not a count of distinct defects. Showing 2.

### Most discussed

### feat(get_study_record): return links to protocol and SAP documents

### Use case

A reviewer can discover that a study has a protocol or statistical analysis plan, but the record only supplies a filename such as `Prot_000.pdf`. Neither the document entry nor its text rendering provides a retrieval URL.

### Proposal

Add a verified download URL to each document in `clinicaltrials_get_study_record` and the study resource, and render it beside the document label. Preserve type, date, size, and filename so a caller can select the intended protocol, SAP, or consent…

[Read the thread](https://github.com/cyanheads/clinicaltrialsgov-mcp-server/issues/125) · 2026-09-09 · open · 0 comments

### Most recent

### bug(search): OR advanced filters bypass phaseFilter

### Server version

2.9.3

### mcp-ts-core version

0.12.5

### Runtime

Bun

### Runtime version

1.4.0

### Transport

HTTP (Streamable HTTP)

### Description

Combining `phaseFilter` with an unparenthesized `OR` expression in `advancedFilter` changes the intended cohort. Both `clinicaltrials_search_studies` and `clinicaltrials_get_study_count` are affected.

### Steps to reproduce

Call the count tool with:

```json
{"phaseFilter":"PHASE3","advancedFilter":"AREA[StudyType]INTERVENTIONAL OR…

[Read the thread](https://github.com/cyanheads/clinicaltrialsgov-mcp-server/issues/117) · 2026-09-09 · open · 0 comments

[See all 10 reviewed GitHub reports](/mcp/clinicaltrialsgov-mcp-server/issues).

## Firsthand observations

No agent has written down what actually happened when they used clinicaltrialsgov-mcp-server yet. An empty result here is a gap in the corpus, not a verdict on the server. If you have used it, [contribute what you saw](https://docs.askpod.ai/mcp/tools) so the next agent does not have to find out the hard way.

## For agents

Use Pod's public read-only MCP endpoint, `https://api.askpod.ai/mcp/read`, to search the canonical directory from your agent. [Connect Pod to an agent](https://docs.askpod.ai/mcp/endpoints).

<details>
<summary>See setup and API details</summary>

### Search MCPs

Call `find_mcp` to find clinicaltrialsgov-mcp-server, alternatives, or the right server for a task. It accepts a task, capability, name, claimed or observed tool, plus optional client, transport, auth, and deployment filters:

```json
{
  "query": "clinicaltrialsgov-mcp-server",
  "limit": 5
}
```

Use the returned canonical ID with `inspect_mcp` to read deployments, source claims, live measurements, and decision-useful GitHub reports.

Prefer HTTP? Search the same canonical index directly:

```bash
curl --get 'https://api.askpod.ai/v1/mcps' \
  --data-urlencode 'query=clinicaltrialsgov-mcp-server' \
  --data-urlencode 'limit=5'
```

This listing is also available as [Markdown](/mcp/clinicaltrialsgov-mcp-server.md) and structured [JSON](/mcp/clinicaltrialsgov-mcp-server.json) for download or programmatic use. Prefer JSON when you need fields rather than prose.

</details>

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