ClinicalTrials.gov registered studies — sponsors, principal investigators, conditions, and status for interventional and observational trials. Name-keyed; NPI / entity-graph linkage is deferred. Source:
FHIR ResearchStudy · Sample record
{
"resourceType": "ResearchStudy",
"id": "NCT00000000",
"_source": "clinicaltrials-gov-studies",
"_methodology": "clinicaltrials-gov/v1",
"title": "Example Interventional Study",
"status": "active"
}Every record carries _source, _methodology, a snapshot date, and a confidence tier. All fourteen provenance fields survive export and API delivery.
curl -H "Authorization: Bearer $FONTEUM_KEY" \ "https://api.fonteum.com/fhir/r4/ResearchStudy?_source=clinicaltrials-gov-studies" \ | jq '._source, ._methodology, .meta.tag'
Fields in this record
Every field below is taken from the live FHIR ResearchStudy record above. Provenance fields (_source, _methodology, and the snapshot date) travel with each record through export and API delivery; identity fields key the record across federal datasets; data fields carry the measured values.
| Field | Type | Role |
|---|---|---|
resourceType | string | Identity |
id | string | Identity |
_source | string | Provenance |
_methodology | string | Provenance |
title | string | Data |
status | string | Data |
Dataset facts
| Field | Value |
|---|---|
| Agency | |
| Category | Research activity |
| Records | |
| Temporal coverage | 2000–2026 |
| Refresh cadence | Monthly |
| Freshness SLA | Within 7 days of ClinicalTrials.gov API refresh |
| Last synced | 2026-06-14Updated 2026-06-14 |
| FHIR resource | ResearchStudy |
| Methodology | clinicaltrials-gov/v1 |
| Measured | Study title, status, conditions, sponsor, and overall officials per registered study |
| Upstream source | clinicaltrials.gov → |
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Related · Research activity
NIH RePORTER federally funded research projects — grant awards, principal investigators, and awardee organizations. Name-keyed; NPI / entity-graph linkage is deferred. Schema and provenance are live; the first ingest snapshot is pending, so this table currently holds 0 rows.
The substrate, by the numbers
Built on the authoritative federal record
The primary sources, named on every page.
These are the federal agencies whose public datasets Fonteum ingests and attributes — the issuing authorities, not customers or partners. Every figure on the site links back to one of them.
See the full source registry, with license and refresh cadence for each →
Reproducible by design
Every figure traces to its federal source.
14-tuple provenance
Every rendered fact ties to a source URL, dataset ID, snapshot date, row key, and SHA-256 — the full chain-of-custody record.
Reproducible SQL
Each study ships the exact query behind its figures, run against the cited federal snapshot. Re-run it yourself.
Daily reconciliation
Published counts are reconciled against the upstream federal datasets on a daily cadence, with drift logged.
Named medical review
Reviewed by Jennifer Montecillo, MD, medical reviewer. Non-practicing medical reviewer.
Two doors
Use the free API and open data
Query providers, facilities, sanctions, and quality scores — each field carrying its federal source. Self-serve, no call to start.
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