Clinicaltrialsgov MCP Server

Install

Works with Claude Code, VS Code, Codex, Cursor, Windsurf, Claude Desktop. Read the repository before you give any tool access to your data.

npx agentmarket install connector/cyanheads-clinicaltrialsgov-mcp-server

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Permissions

What this server can do and what it asks for, from its tool list and install config. Checked Oct 25, 2026.

Tools

7 read · 0 write · 0 deleteRead-only

Secrets

None asked for

Install scripts

Not scanned yet

Runs as

Node.js package

Tools (7)

As the server listed them on Oct 25, 2026. Descriptions are the server’s own words; hidden characters are shown as [U+…].

• clinicaltrials_find_eligibleClinicaltrials Find Eligibleread-only

  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 search only — inclusion/exclusion criteria are not checked, and a candidate can exclude the requested condition, so review each one's criteria with clinicaltrials_get_study_record before treating it as a match. Results are re-ranked so studies whose own condition matches a requested condition surface a…

• clinicaltrials_get_field_definitionsClinicaltrials Get Field Definitionsread-only

  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: `"search"` — keyword search returning ranked matches (pass `query`, e.g. "enrollment", "sponsor", "adverse events"); `"drill"` — drill into a specific section by dot-notation path (pass `path`, e.g. "protocolSection.designModule"); `"overview"` — top-level summary of all sections (no additional args…

• clinicaltrials_get_field_valuesClinicaltrials Get Field Valuesread-only

  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_study_countClinicaltrials Get Study Countread-only

  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 a condition).

• clinicaltrials_get_study_recordClinicaltrials Get Study Recordread-only

  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 locations, outcomes, and references — original totals are preserved in `filtersApplied` only when a cap actually trims the set.

• clinicaltrials_get_study_resultsClinicaltrials Get Study Resultsread-only

  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 available for studies where hasResults is true. Use clinicaltrials_search_studies first to find studies with results. Each call fetches up to 20 distinct NCT IDs and returns any further IDs in deferredNctIds for a follow-up call. A results-rich record can exceed 500KB per study in full mode — bound it w…

• clinicaltrials_search_studiesClinicaltrials Search Studiesread-only

  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 study records are ~70KB each.

Signals

Stars

98

Forks

24

Open issues

3

Last commit

Oct 23, 2026 (9 days ago)

Last release

Oct 26, 2026 (6 days ago)

From GitHub (fetched Oct 24, 2026).

Details

Registry name

io.github.cyanheads/clinicaltrialsgov-mcp-server

Version

2.10.2

Auth

Auth not stated

Packages

npm clinicaltrialsgov-mcp-servernpm clinicaltrialsgov-mcp-server

License

Apache-2.0

Repository

github.com/cyanheads/clinicaltrialsgov-mcp-server

First seen

Oct 24, 2026

Last checked

Nov 1, 2026

Source

Official MCP Registrygithub-graphql