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from $6.00 / 1,000 results

Clinical Trials Meta-Search API — ClinicalTrials.gov + ISRCTN

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

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from $6.00 / 1,000 results

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Kyle Maloney

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Clinical Trials Meta-Search API — ClinicalTrials.gov, ISRCTN & EU

A clinical trials API that searches ClinicalTrials.gov, the ISRCTN registry, and EU trial registries in a single call, then deduplicates the results into one unified schema — with optional patent linkage. Stop reconciling three registries by hand; get one clean, deduplicated feed of trials.

Who it's for

Pharma & biotech competitive-intelligence teams tracking a drug, target, or indication across registries.
Clinical research / CRO analysts who need a single deduplicated trial list.
Investors & market researchers monitoring a therapeutic pipeline.
Data teams & AI agents that want clinical-trial data as a clean API/tool call.

What it does

Runs your query against multiple trial registries, normalizes each result into a shared schema (title, status, phase, conditions, interventions, sponsor, dates, locations, registry + source ID), and merges duplicate trials that appear in more than one registry into a single record. Optionally links interventions to patents (PatentsView) when an API key is supplied. You pay per unified trial, not per raw registry hit.

Example input

{
  "query": "semaglutide obesity",
  "sources": ["clinicaltrials.gov", "isrctn"],
  "onlyMultiRegistry": false,
  "includePatents": false,
  "maxResults": 200
}

Output (per unified trial)

trial_id, source_registries[], title, status, phase, conditions[], interventions[], sponsor, start_date, completion_date, locations[], registry_urls[], and optional patents[].

Use as an MCP tool

This actor is a clean, chainable tool for AI agents (Claude, Cursor, etc.) via mcp.apify.com. Field-level output descriptions mean an agent can call it as a "search clinical trials" tool and get structured, deduplicated results back.

FAQ

Which registries are covered? ClinicalTrials.gov, ISRCTN, and EU registries. Is an API key required? No — the registries are keyless. A PatentsView key is only needed if you enable patent linkage. How is deduplication done? Trials appearing in multiple registries are merged on cross-registry identifiers into one record listing all source registries. Can I get only cross-registry trials? Yes — set onlyMultiRegistry: true.

Source

Official ClinicalTrials.gov API v2, ISRCTN, and EU registry endpoints — keyless, JSON, no anti-bot.

Pricing (Pay Per Result)

Billed per unified trial record returned. Empty searches cost nothing.

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