Clinicaltrials Get Study Record
clinicaltrials_get_study_recordRead-onlyIdempotent
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.
Tool call template
Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.
{
"id": 1,
"jsonrpc": "2.0",
"method": "tools/call",
"params": {
"arguments": {
"nctId": "<nctId>"
},
"name": "clinicaltrials_get_study_record"
}
}Input Schema
| Name | Required | Description | Default |
|---|---|---|---|
| nctId | Yes | NCT identifier — format `NCT` followed by 8 digits (e.g., `NCT03722472`). | |
| nearLocation | No | Filter returned locations to those within radius of (lat, lon) and sort by distance. Adds distanceMi to each location. Locations without published coordinates are dropped — most US sites carry them; international sites less reliably so. Distances reflect ClinicalTrials.gov geocoding granularity — typically city-centroid, not facility-level — so multiple sites in the same city resolve to near-identical distances. For broader geographic filtering across studies, use clinicaltrials_search_studies with geoFilter. | |
| outcomeLimit | No | Optional cap on the number of secondary and other outcomes returned. Omit for no cap (full upstream lists); 0 leaves the secondary and other outcomes out; a value at or past a list length also returns that whole list. Primary outcomes are never capped. Original totals preserved in filtersApplied.totalSecondaryOutcomes / totalOtherOutcomes only when the cap trims a list. | |
| locationLimit | No | Optional cap on the number of locations returned. Omit for no cap (full upstream list); 0 leaves the locations out; a value at or past the list length also returns every location. Pairs naturally with nearLocation for narrowing a large multi-site trial. Original total preserved in filtersApplied.totalLocations only when the cap trims the list. | |
| referenceLimit | No | Optional cap on the number of references returned. Omit for no cap (full upstream list); 0 leaves the references out; a value at or past the list length also returns every reference. Original total preserved in filtersApplied.totalReferences only when the cap trims the list. seeAlsoLinks are never capped. |
Output Schema
| Name | Required | Description | Default |
|---|---|---|---|
| error | No | Present when the call failed. Absent on success. | |
| study | No | Full study record with caller-requested filters already applied to locations and outcomes. Top-level keys: protocolSection (identification, status, sponsor, conditions, design, arms/interventions, outcomes, eligibility, contacts/locations), derivedSection (MeSH-normalized terms), hasResults, documentSection. The heavy resultsSection is omitted — see resultsSummary for counts and clinicaltrials_get_study_results for full results data. Use clinicaltrials_get_field_definitions to explore the schema. | |
| filtersApplied | No | Metadata about the filtering applied to `study`. | |
| resultsSummary | No | Compact counts of posted results, present when hasResults is true. The full resultsSection is intentionally omitted from this record-level tool — fetch it via clinicaltrials_get_study_results. |