Clinical trial history, recorded daily.
ClinicalTrials.gov publishes the current state of every registered study — and overwrites it. Kite Data records the full registry every day and stores each field-level change, so the state of any trial on any past date can be reconstructed.
Example values, shown to illustrate the record format. These are not actual recorded changes.
611,006 Studies in the registry, recorded in full
- Daily full snapshots
- Field-level diffs, with old and new values
- History from 10 Nov 2026
Registry total: ClinicalTrials.gov API v2, retrieved November 2026.
Clinical Trial Change History
ClinicalTrials.gov is the world’s largest registry of clinical studies, and it shows only the present: when a sponsor amends a protocol, moves a completion date, or changes a study’s status, the previous state is overwritten. The registry operator offers no structured point-in-time feed, so the history of a trial cannot be recovered after the fact.
Kite Data records the entire registry every day and stores the difference — which studies were added, which were removed, and exactly which fields changed, with the old and new values. Recording began on 10 November 2026, and the history grows by one day, every day.
The data
- Source
- ClinicalTrials.gov (official API v2)
- Coverage
- All registered studies
- Update
- Daily
- History
- From 10 Nov 2026, growing daily
- Format
- JSONL (gzip) — full records plus field-level change records
- Delivery
- Download (S3-compatible) or SFTP
- Reconstruction
- Baseline + daily diffs rebuild any date’s full state
How it works
Full snapshot
The entire registry, every day — every registered study, fetched in full through the official API.
Daily diff
Added, modified, and deleted studies, detected against the previous snapshot, with old → new values recorded per field.
Reconstruction
Apply the daily diffs to the baseline to rebuild the registry exactly as it stood on any recorded date.
Japan Job Postings: off-schema fields
In preparation — sample in development. The collection method is being finalised with licensing counsel.
A structured feed of Japanese job postings, built around the fields the major taxonomies do not carry: overnight shifts, employer housing, visa sponsorship, Japanese-language level, and Specified Skilled Worker eligibility.
Who uses it
Pharma competitive intelligence
Track protocol amendments, status, and timeline changes across a therapeutic area, as dated events rather than silent edits.
Evidence synthesis
Point-in-time registry states for systematic reviews, so the record a review was based on can be reproduced later.
Investment research
Trial milestone changes — starts, completions, suspensions, outcome-measure edits — as a dated event stream.
Pricing & access
One feed, one flat monthly subscription. Pricing on request.
Sample
Request a sample file and the data dictionary, and check the format against your pipeline before subscribing.
Subscription
Full history to date plus daily updates. Licence terms on request.
FAQ
What is the difference between the sample and the subscription?
The sample is an excerpt of the feed, provided with the data dictionary so you can check the format. The subscription covers the full recorded history to date plus daily updates for as long as it runs.
How is the data delivered, and in what format?
As JSONL files compressed with gzip — full study records plus field-level change records. Delivery is by download (S3-compatible storage) or SFTP.
What does the feed cover?
All studies registered on ClinicalTrials.gov, recorded in full every day. The recorded history starts on 10 November 2026 and grows daily; changes before that date are not covered.
What are the licensing and redistribution terms?
Licence terms are provided on request before a subscription starts, including what internal use and redistribution are permitted.
What support is included?
Email support.
Request a sample
Tell us which feed you are interested in and what you plan to use it for, and we will send a sample file and the data dictionary.