Clinicaltrialsgov MCP Server
Search ClinicalTrials.gov: find studies, retrieve results, match patients to candidate trials.
Connect it
Settings → Connectors → Add custom connector
URL: https://clinicaltrials.caseyjhand.com/mcpSettings → Apps & Connectors → Advanced → Developer mode
Create connector with URL: https://clinicaltrials.caseyjhand.com/mcp{
"mcpServers": {
"clinicaltrialsgov-mcp-server": {
"url": "https://clinicaltrials.caseyjhand.com/mcp"
}
}
}claude mcp add --transport http clinicaltrialsgov-mcp-server https://clinicaltrials.caseyjhand.com/mcp{
"servers": {
"clinicaltrialsgov-mcp-server": {
"type": "http",
"url": "https://clinicaltrials.caseyjhand.com/mcp"
}
}
}{
"mcpServers": {
"clinicaltrialsgov-mcp-server": {
"command": "npx",
"args": [
"-y",
"clinicaltrialsgov-mcp-server@2.10.0"
]
}
}
}claude mcp add clinicaltrialsgov-mcp-server -- npx -y clinicaltrialsgov-mcp-server@2.10.07 tools, verified live
clinicaltrials_search_studiesread-onlySearch 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 â full study records are ~70KB each.
clinicaltrials_get_study_recordread-onlyFetch 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 locations, outcomes, and references â original totals are preserved in `filtersApplied` only when a cap a
clinicaltrials_get_study_countread-onlyGet 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 a condition).
clinicaltrials_get_field_valuesread-onlyDiscover valid values for ClinicalTrials.gov fields with study counts per value. Use to explore available filter options before building a search â e.g., valid OverallStatus, Phase, InterventionType, StudyType, or LeadSponsorClass values.
clinicaltrials_get_field_definitionsread-onlyResolve valid field names from the ClinicalTrials.gov data model â 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: `"search"` â keyword search returning ranked matches (pass `query`, e.g. "enrollment", "sponsor"
clinicaltrials_get_study_resultsread-onlyFetch clinical trial results data from ClinicalTrials.gov for completed studies â outcome measures with statistics, adverse events, participant flow, baseline characteristics, and results metadata (limitations & caveats, certain-agreement disclosure restrictions, results point of contact). Only available for studies where hasResults is true. Use clinicaltrials_search_studies first to find studie
clinicaltrials_find_eligibleread-onlyFind 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 search only â inclusion/exclusion criteria are not checked, and a candidate can exclude the requested
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