Clinical trials search API

Search ClinicalTrials.gov for studies by condition, drug, or term, optionally filtered by status (e.g. RECRUITING). Returns NCT id, title, phase, conditions, sponsor. Answers 'trials for this drug', 'recruiting trials for X', 'clinical studies on Y'.

Price$0.01per request

MethodPOST

Route/v1/science/clinical-trials

StatusLive

MIME typeapplication/json

Rate limit60/minute

Cache3600s public

scienceclinical-trialsmedicaldrugresearchhealthpharma

API URLhttps://x402.hexl.dev/v1/science/clinical-trials

Integration docs

Example request

{
  "query": "diabetes",
  "status": "RECRUITING",
  "limit": 2
}

Example response

{
  "query": "diabetes",
  "total": 5000,
  "trials": [
    {
      "nctId": "NCT01234567",
      "title": "A Study of …",
      "status": "RECRUITING",
      "phase": "Phase 3",
      "conditions": [
        "Diabetes"
      ],
      "sponsor": "Acme"
    }
  ]
}

Input schema

{
  "type": "object",
  "required": [
    "query"
  ],
  "properties": {
    "query": {
      "type": "string",
      "examples": [
        "diabetes"
      ]
    },
    "status": {
      "type": "string",
      "examples": [
        "RECRUITING"
      ]
    },
    "limit": {
      "type": "number",
      "default": 10
    }
  }
}

Output schema

{
  "type": "object",
  "additionalProperties": true
}