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Clinical Trials API - ClinicalTrials.gov, ISRCTN, EU CTIS

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Clinical trials API: search ClinicalTrials.gov, ISRCTN and the EU CTIS register in one call and get deduplicated trial records in a unified schema, with per-registry status on every row and optional patent linkage. Query by condition, drug, sponsor or status. Keyless, official registries.

Pricing

from $3.30 / 1,000 results

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Developer

Kyle Maloney

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Bookmarked

Total users

Monthly active users

21 days ago

Last modified

Categories

Developer tools

Automation

Search query

query

Required

A condition, drug, intervention, or sponsor to search across all registries (e.g. "melanoma", "semaglutide", "Pfizer").

Type:string

Registries to search

sources

Optional

Which trial registries to include. ClinicalTrials.gov (US NIH), ISRCTN (UK/international) and EU CTIS are all keyless. The maxResults budget is shared FAIRLY across whichever you enable, so no single registry can fill the cap alone.

Type:string[]

Default:

[
  "clinicaltrials",
  "isrctn",
  "euctis"
]

Max unified results

maxResults

Optional

Maximum number of deduplicated trial records to return. This is a true emit cap and therefore also your bill cap: one row written = one billable result. The budget is split max-min fairly across the registries you enabled, with trials found in 2+ distinct registries reserved off the top.

Type:integer

Minimum:1

Maximum:5000

Default:100

Only trials found in 2+ distinct registries

onlyMultiRegistry

Optional

Return only trials found in more than one DISTINCT registry - the unique value of a meta-search. Applied before the maxResults cap. Corrected 2026-08-25: this previously also kept trials whose two merged records came from the same registry.

Type:boolean

Default:false

Link related patents

includePatents

Optional

Enrich each trial with related US patents matched on its interventions. Requires a free PatentsView API key; setting this to true without a key FAILS the run rather than silently returning zero patents on every row. Patents add columns, not rows, so they do not change what you are billed.

Type:boolean

Default:false

PatentsView API key (optional)

patentsViewApiKey

Optional

Free key from https://search.patentsview.org/ — only needed if 'Link related patents' is enabled.

Type:string

EU Clinical Trials (CTIS) Scraper

crawlerbros/eu-ctis-scraper

Scrape the EU Clinical Trials Information System (CTIS) - the EMA's official register of clinical trials across the EU/EEA. Search by title, condition, sponsor, status, phase, therapeutic area, country, and more, or look up full trial detail by EU CT number. Public REST API - no auth, no proxy.

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EU Clinical Trials EMA CTIS Scraper

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Scrapes EU clinical trials from the EMA CTIS register by search term, status, or phase. Returns each trial as a flat row with title, sponsor, condition, status, and phase.

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EU Clinical Trials (CTIS) - Trial Registry, Per Trial

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EU CTIS (EMA) clinical trials as clean per-trial records - EU CT number, title, status, sponsor org, phase, member states, condition and decision date. Registry metadata only; no contacts or narrative. $0.05 per record.

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WHO ICTRP Clinical Trials Scraper

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Scrape the WHO ICTRP clinical trials search portal, aggregating 22+ national registries (ClinicalTrials.gov, EU-CTR/CTIS, ISRCTN, ChiCTR, ANZCTR, CTRI and more). Search by condition, intervention, sponsor, status or trial ID; get full trial metadata.

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Clinical Trials Tracker — ClinicalTrials.gov API

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Search and monitor clinical trials from ClinicalTrials.gov by condition, term, sponsor, or status. Phases, enrollment, sponsors, locations, and dates.

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Search and extract clinical trials by condition, drug, sponsor, or location, status, phase, eligibility, enrollment, and sites from ClinicalTrials.gov.

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Clinical Trials Search — ClinicalTrials.gov API

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Clinical trials search over the public ClinicalTrials.gov v2 API. Filter by condition, drug, sponsor, phase, status, and location. Returns NCT IDs, phases, sponsors, locations, and summaries.

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Clinical Trials Monitor - ClinicalTrials.gov to JSON

aaddss/clinical-trials-monitor

Search and monitor ClinicalTrials.gov via the official API. Filter by condition, sponsor, or status and get clean, flattened, no-code-ready records.

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EU Clinical Trials Register Scraper

parseforge/eu-clinical-trials-register-scraper

Scrapes clinical trial records from the EU Clinical Trials Register by keyword and status. Returns each trial as a flat row with title, sponsor, conditions, and phases.

ParseForge