# ClinicalTrials.gov Study Detail Lookup by NCT ID

> ClinicalTrials.gov Study Detail Lookup by NCT ID is a paid API for AI agents from clinical.memoryapi.org, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).

Retrieves full details of a specific clinical trial by NCT ID, including eligibility criteria, outcome measures, and study locations.

## Facts

- Endpoint: GET https://clinical.memoryapi.org/x402/clinical/study
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/clinical-memoryapi-org-f01caf4e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_MTnKGHpUXWvVRIvdYtahR

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability clinical-memoryapi-org-f01caf4e
```

Example prompt: Can you pull up all the details for clinical trial NCT04280705 — I want to know the eligibility criteria, what outcomes they're measuring, and where the study sites are located?

## When to prefer this

Use this endpoint when you already have a specific NCT ID and need comprehensive trial details — eligibility, outcomes, and locations — in a single call. Prefer this over the search endpoint when the trial identifier is known. Use instead of the aggregation endpoint when you need trial-level detail rather than condition-level statistics.

## Known failure modes

- Invalid or malformed NCT ID returns an error
- NCT ID not found in ClinicalTrials.gov database returns 404 or empty result
- Upstream ClinicalTrials.gov API unavailability causes service errors
- Payment failure (insufficient USDC balance) blocks request
- Rate limiting if too many requests are made in rapid succession

## How this service works

ClinicalTrials.gov — get full details of a specific trial by NCT ID including eligibility, outcomes, and locations.

## Output

Returns structured full-detail record for the specified clinical trial including eligibility inclusion/exclusion criteria, primary and secondary outcome measures, study site locations, current status, phase, sponsor information, enrollment numbers, and trial description.

## Example request

```json
{
 "nct_id": "NCT03232697"
}
```

## Request schema (JSON Schema)

```json
{
 "properties": {
  "input": {
   "required": [
    "method"
   ],
   "properties": {
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "example": {
  "title": {
   "brief": "SUSTAIN 6 — Semaglutide and Cardiovascular Outcomes"
  },
  "nct_id": "NCT03232697",
  "success": true,
  "eligibility": {
   "sex": "ALL",
   "min_age": "18 Years"
  },
  "primary_outcomes": [
   {
    "measure": "Time to first MACE event",
    "time_frame": "104 weeks"
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/clinical-memoryapi-org-f01caf4e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from clinical.memoryapi.org](https://www.zero.xyz/host/clinical.memoryapi.org/llms.txt)