Clinical trial search — find ClinicalTrials.gov studies by free text, condition,
Clinical trial search — find ClinicalTrials.gov studies by free text, condition, intervention, sponsor, recruitment status and phase, and get each study's NCT id, titles, status, phases, conditions, interventions, sponsor, start and completion dates, enrollment and whether results are posted. Use for drug development, medical research and patient-recruitment questions.
Answeringour last check, 2026-10-21
1 of 1checks answered this week
800 msmedian answer time
$0.01listed price per call
$0.01price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
GET https://clinical-trials.use.x402atlas.com/search
| Category | Search and research |
|---|---|
| Provider host | clinical-trials.use.x402atlas.com |
| Networks | eip155:137, eip155:42161, eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| Payment schemes | exact |
| Self-reported calls, 30 days | 2 from 2 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-21 | valid payment request | 402 | $0.01 | 800 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"query": "semaglutide",
"status": "recruiting"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"additionalProperties": false,
"properties": {
"condition": {
"description": "Condition or disease filter",
"maxLength": 200,
"type": "string"
},
"intervention": {
"description": "Intervention or treatment filter",
"maxLength": 200,
"type": "string"
},
"limit": {
"default": 10,
"maximum": 50,
"minimum": 1,
"type": "integer"
},
"page_token": {
"description": "next_page_token of the previous page",
"maxLength": 512,
"type": "string"
},
"phase": {
"description": "early1 = early phase 1; na = not applicable",
"enum": [
"early1",
"1",
"2",
"3",
"4",
"na"
],
"type": "string"
},
"query": {
"description": "Free-text search over all study fields",
"maxLength": 200,
"type": "string"
},
"sponsor": {
"description": "Lead sponsor name filter",
"maxLength": 200,
"type": "string"
},
"status": {
"description": "Comma-separated, up to 5 of: recruiting, not_yet_recruiting, active_not_recruiting, enrolling_by_invitation, completed, suspended, terminated, withdrawn, available, no_longer_available, temporarily_not_available, approved_for_marketing, withheld, unknown",
"maxLength": 200,
"type": "string"
}
},
"required": [
"query"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"additionalProperties": false,
"properties": {
"as_of": {
"description": "Retrieval time, UTC",
"format": "date-time",
"type": "string"
},
"caveat": {
"description": "Fixed interpretation note",
"type": "string"
},
"condition": {
"description": "Applied filter; empty when none",
"type": "string"
},
"count": {
"description": "Studies on this page",
"type": "integer"
},
"intervention": {
"description": "Applied filter; empty when none",
"type": "string"
},
"modified": {
"description": "Always true: fields are normalized, not the registry's verbatim record",
"type": "boolean"
},
"next_page_token": {
"description": "Pass as page_token for the next page; empty on the last page",
"type": "string"
},
"note": {
"description": "Present only on a sample or empty response",
"type": "string"
},
"phase": {
"description": "Applied phase filter; empty when none",
"type": "string"
},
"query": {
"type": "string"
},
"source": {
"additionalProperties": false,
"properties": {
"citation": {
"description": "Attribution requested by the registry",
"type": "string"
},
"name": {
"type": "string"
},
"url": {
"type": "string"
}
},
"required": [
"name",
"url",
"citation"
],
"type": "object"
},
"sponsor": {
"description": "Applied filter; empty when none",
"type": "string"
},
"status": {
"description": "Applied status filter",
"items": {
"type": "string"
},
"type": "array"
},
"studies": {
"description": "Study summaries: nct_id, title, official_title, status (lowercase registry status), study_type, phases[] (early1|1|2|3|4|na), conditions[], interventions[] {type, name}, lead_sponsor, start_date/primary_completion_date/completion_date {date, precision: day|month|year, type?} (absent when not reported), enrollment {count, type}, has_results, url",
"items": {
"type": "object"
},
"type": "array"
},
"total": {
"description": "Studies matching across all pages",
"type": "integer"
}
},
"required": [
"as_of",
"source",
"caveat",
"modified",
"query",
"condition",
"intervention",
"sponsor",
"status",
"phase",
"count",
"total",
"studies",
"next_page_token"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"