cyanheads / clinicaltrialsgov-mcp-server

What it does

• Free-text query plus field-specific conditionQuery / interventionQuery / locationQuery / sponsorQuery / titleQuery / outcomeQuery, statusFilter / phaseFilter enums (case and spacing variants accepted), advancedFilter (AREA[FieldName]value /
• Returns a compact per-study index by default (nctId, briefTitle, overallStatus, phases, enrollmentCount, hasResults, …); fields (PascalCase leaves) selects a full-fidelity projection — full records run ~70KB
• nctIds (up to 1000 entries, repeats collapsed) is served up to what fits one ClinicalTrials.gov request beside the other parameters — about 560 IDs on their own — with the rest returned unqueried in deferredNctIds, the same on every page of
• Typed errors. blank_value, ids_not_found, field_invalid, enum_invalid, query_parse_error, geo_invalid, sort_invalid, page_token_invalid, request_too_long, rate_limited
• Full protocol record by nctId, with optional locationLimit, outcomeLimit / referenceLimit, and nearLocation (lat, lon, radiusMi) to bound and sort locations — none has an upper bound; a value past the list returns all of it