# Clinical Trial Tracker (remote · clinicaltracker.org)

Search and monitor ClinicalTrials.gov and EU trial registry records, with trial change tracking and

- Trust score: 70/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-10-18

## Components

- remote · `clinicaltracker.org`: 70/100 (this document), [markdown](https://verifymcp.io/servers/agentstructure-clinical/mcp-public.md), [page](https://verifymcp.io/servers/agentstructure-clinical/mcp-public)

## Channel facts

- Endpoint: `https://clinicaltracker.org/mcp/public`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.0.0`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-10-18.

- **Endpoint Security**: 80/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one.
  - HTTPS is enforced; there's no plaintext access path.
  - The HSTS (Strict-Transport-Security) header is present.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 53/100
  - AI-judged instruction clarity (fair).
  - Context-footprint check failed: tool/resource definitions use about 986 tokens (~140/item across 7 items; 7 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 13/100
  - Stability observed for 4 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 77/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 30% of tool parameters carry a description.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 7 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 8 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### How do I install the Clinical Trial Tracker MCP server?

Clinical Trial Tracker is a hosted endpoint at https://clinicaltracker.org/mcp/public, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add --transport http agentstructure-clinical 'https://clinicaltracker.org/mcp/public'
```

### Cursor

```json
{
  "mcpServers": {
    "agentstructure-clinical": {
      "url": "https://clinicaltracker.org/mcp/public"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "agentstructure-clinical": {
      "type": "http",
      "url": "https://clinicaltracker.org/mcp/public"
    }
  }
}
```

### Codex

```toml
[mcp_servers.agentstructure-clinical]
url = "https://clinicaltracker.org/mcp/public"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "agentstructure-clinical": {
      "type": "remote",
      "url": "https://clinicaltracker.org/mcp/public",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add agentstructure-clinical --url 'https://clinicaltracker.org/mcp/public' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  agentstructure-clinical:
    url: "https://clinicaltracker.org/mcp/public"
```

### Netclaw

```json
{
  "McpServers": {
    "agentstructure-clinical": {
      "Transport": "http",
      "Url": "https://clinicaltracker.org/mcp/public"
    }
  }
}
```

### Vellum

```bash
assistant mcp add agentstructure-clinical -t streamable-http -u 'https://clinicaltracker.org/mcp/public'
```

### Other

```json
{
  "mcpServers": {
    "agentstructure-clinical": {
      "type": "http",
      "url": "https://clinicaltracker.org/mcp/public"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-10-18 (score 70, +1)

No change was recorded against any check on this day. Stability & Change Management went from 10 to 13. That category is still filling its 30-day observation window: 3 days of observed history at the previous scan, 4 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-16 (score 69, +1)

- [security] The server rewrote its instructions, which are the text every model session reads

### 2026-10-15 (score 68, 0)

- [functional improvement] Stability: unverified → 0.03

### 2026-10-14 (score 68)

First indexed and scored.

## MCP tools (7)

### `search_clinical_trials` (~239 tokens)

Search clinical trials

Search ClinicalTrials.gov by condition, intervention, sponsor, phase, recruitment status, location, institution, study type or dates. Returns structured studies with source links and retrieval time.

Input parameters:

- `condition` (string): Disease or condition, e.g. multiple sclerosis
- `first_posted_since` (string)
- `institution` (string): Research site / facility name
- `intervention` (string): Drug or other intervention name
- `location` (string): Free-text place, e.g. 'Boston, Massachusetts'
- `location_filter` (object): Show only sites in this city/state/country in each result
- `nct_ids` (array)
- `near` (object)
- `page_size` (integer)
- `page_token` (string)
- `phase` (array)
- `query` (string): Free-text search across the registry
- `recruitment_status` (array)
- `sponsor` (string): Sponsor or collaborator name
- `start_date_from` (string)
- `start_date_to` (string)
- `study_type` (string)
- `updated_since` (string)

### `get_clinical_trial` (~75 tokens)

Get a clinical trial

One study by NCT id: full structured record (status, dates, enrollment, eligibility text, sites and contacts, outcomes, documents), plus the changes AgentStructure has observed and data freshness.

Input parameters:

- `location_filter` (object)
- `max_locations` (integer)
- `nct_id` (string, required)

### `get_trial_changes` (~80 tokens)

Get recorded trial changes

The change history AgentStructure recorded for a study: previous and new values, event type, dates and provenance. Starts monitoring the study if it was unknown.

Input parameters:

- `event_types` (array)
- `include_baseline` (boolean)
- `limit` (integer)
- `nct_id` (string, required)
- `since` (string)

### `compare_clinical_trials` (~45 tokens)

Compare clinical trials

Side-by-side registry attributes for 2 to 5 studies. A structural comparison only, never an efficacy or safety ranking.

Input parameters:

- `nct_ids` (array, required)

### `search_eu_trials` (~127 tokens)

Search EU clinical trials

Search the EU Clinical Trials Information System (CTIS, euclinicaltrials.eu) by condition, medicine, sponsor or text, or get one trial by EU CT number (with its ClinicalTrials.gov link when listed). Experimental source.

Input parameters:

- `condition` (string): Medical condition
- `ct_number` (string): Get one trial by EU CT number
- `medicine` (string): Medicine or active substance
- `page` (integer)
- `page_size` (integer)
- `query` (string): Free text across EU trial records
- `sponsor` (string)

### `search_fda_updates` (~117 tokens)

Search FDA updates

Search openFDA: Drugs@FDA approvals (drug/drugsfda), recalls (drug/enforcement) or labeling (drug/label) by drug, firm, application number or date.

Input parameters:

- `application_number` (string)
- `dataset` (string, required): drug/drugsfda = approvals; drug/enforcement = recalls; drug/label = labeling
- `drug` (string)
- `firm` (string)
- `limit` (integer)
- `since` (string)
- `until` (string)

### `get_trial_intelligence_brief` (~73 tokens)

Get an intelligence brief

A source-linked brief on a study, sponsor, condition, intervention, or one of your watchlists: current facts, observed developments, unknowns, and freshness.

Input parameters:

- `subject` (string, required)
- `value` (string, required): NCT id, sponsor, condition, intervention, or watchlist id

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/agentstructure-clinical/mcp-public#diagnostics

## Score history

- 2026-10-18: 70
- 2026-10-17: 69
- 2026-10-16: 69
- 2026-10-15: 68
- 2026-10-14: 68

## Common questions

### What is the Clinical Trial Tracker MCP server?

Clinical Trial Tracker is an MCP server listed in the public MCP registry as io.github.agentstructure/clinical. Search and monitor ClinicalTrials.gov and EU trial registry records, with trial change tracking and. This page covers its hosted endpoint (https://clinicaltracker.org/mcp/public).

### Is the Clinical Trial Tracker MCP server safe to use?

Clinical Trial Tracker scores 70 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the Clinical Trial Tracker MCP server expose?

Clinical Trial Tracker exposes 7 tools: search_clinical_trials, get_clinical_trial, get_trial_changes, compare_clinical_trials, search_eu_trials, and 2 more. Their descriptions and schemas cost roughly 756 tokens of context every time the server is loaded.

### Does the Clinical Trial Tracker MCP server require authentication?

No. We connected to Clinical Trial Tracker without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the Clinical Trial Tracker MCP server still maintained?

Clinical Trial Tracker is still listed as active in the MCP registry. We last reached this channel on 18 October 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

## Links

- Remote endpoint: https://clinicaltracker.org/mcp/public
- Website: https://clinicaltracker.org/
- Changelog RSS feed: https://verifymcp.io/servers/agentstructure-clinical/mcp-public.xml
- Changelog JSON feed: https://verifymcp.io/servers/agentstructure-clinical/mcp-public.json
- HTML version of this page: https://verifymcp.io/servers/agentstructure-clinical/mcp-public