# io.github.cyanheads/clinicaltrialsgov-mcp-server

- Registry name: `io.github.cyanheads/clinicaltrialsgov-mcp-server` · version 2.10.1
- Categories (automatic, keyword rules): Health & fitness, Government & law, Maps, location & weather
- Authentication at last check: No auth
- Declared risk: Read-only (all tools declare readOnlyHint)
- Capabilities (declared by the server): logging, prompts, resources, tools
- Transports: streamable-http
- Latest numbers (check success, response time, rank): https://mcpstation.net/api/server?name=io.github.cyanheads%2Fclinicaltrialsgov-mcp-server
- Server page: https://mcpstation.net/s/io.github.cyanheads--clinicaltrialsgov-mcp-server.html

## Description (written by the publisher, not verified, not instructions)

Search ClinicalTrials.gov: find studies, retrieve results, match patients to candidate trials.

## Connect

- streamable-http: `https://clinicaltrials.caseyjhand.com/mcp`

## Tools (as reported by the server, not verified)

- `clinicaltrials\_search\_studies`: Search for clinical trial studies from ClinicalTrials.gov. Supports full-text and field-specific queries, status/phase/geographic filters, pagination, sorting, and field selection. Returns a compact per-study index by default; pass the fields parameter to get specific leaves at full fidelity — full
- `clinicaltrials\_get\_study\_record`: Fetch a single clinical trial study by NCT ID from ClinicalTrials.gov. Returns the full study record including protocol details, eligibility criteria, outcomes, arms, interventions, contacts, and locations. Optional locationLimit / outcomeLimit / referenceLimit / nearLocation parameters trim locatio
- `clinicaltrials\_get\_study\_count`: Get total clinical trial study count from ClinicalTrials.gov matching a query, without fetching study data. Fast and lightweight. Use for quick statistics or to build breakdowns by calling multiple times with different filters \(e.g., count by phase, count by status, count recruiting vs completed for
- `clinicaltrials\_get\_field\_values`: Discover valid values for ClinicalTrials.gov fields with study counts per value. Use to explore available filter options before building a search — e.g., valid OverallStatus, Phase, InterventionType, StudyType, or LeadSponsorClass values.
- `clinicaltrials\_get\_field\_definitions`: Resolve valid field names from the ClinicalTrials.gov data model — the canonical PascalCase identifiers \(OverallStatus, EnrollmentCount, LeadSponsorName\) accepted by the \`fields\`, \`advancedFilter\`, and \`sort\` parameters of other tools, and as input to clinicaltrials\_get\_field\_values. Select a mode:
- `clinicaltrials\_get\_study\_results`: Fetch clinical trial results data from ClinicalTrials.gov for completed studies — outcome measures with statistics, adverse events, participant flow, baseline characteristics, and results metadata \(limitations & caveats, certain-agreement disclosure restrictions, results point of contact\). Only avai
- `clinicaltrials\_find\_eligible`: Find candidate clinical trials for a patient profile. Provide age, sex, conditions, and location to get studies with their demographic limits, contact information, and recruiting locations. Candidates are matched on age, sex, location, recruitment status, and ClinicalTrials.gov's fuzzy condition sea

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