# TrialScope — Clinical Trial Study Dossier Lookup

> TrialScope — Clinical Trial Study Dossier Lookup is a paid API for AI agents from x402-trialscope.onrender.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-19).

Fetches a full study dossier for a specific clinical trial by NCT ID from ClinicalTrials.gov, paid per call via x402/USDC

## Facts

- Endpoint: GET https://x402-trialscope.onrender.com/study/%7BnctId%7D?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-19
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/trialscope-clinical-trial-study-dossier-lookup-c563ec9f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_63M6ZFla3UefVotisj0I-

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 trialscope-clinical-trial-study-dossier-lookup-c563ec9f
```

Example prompt: Can you pull up the full study dossier for clinical trial NCT04280705 — I need the protocol details, eligibility criteria, and current recruitment status?

## When to prefer this

Use this endpoint when you need detailed, structured information about a specific known clinical trial identified by its NCT ID. Prefer this over general search when you already have the trial identifier and need the full dossier including eligibility, protocol, status, and change history. It is particularly valuable when you need to monitor changes to a specific trial record over time. Not suitable for discovery of trials by condition or keyword — use a search endpoint for that.

## Known failure modes

- HTTP 402 returned if USDC payment via x402 protocol is not included or is insufficient
- Invalid or non-existent NCT ID returns an error or empty result
- ClinicalTrials.gov upstream unavailability may cause fetch failures
- Malformed NCT ID format may cause a bad request error
- Trial record may be incomplete if ClinicalTrials.gov has sparse data for that study

## How this service works

Per-call clinical trial search, study dossiers, and change-deltas from ClinicalTrials.gov. Paid per call via the x402 protocol (USDC); unpaid requests return HTTP 402 with payment terms in the PAYMENT-REQUIRED header. Terms of service: GET /terms (free).

## Output

A structured study dossier containing trial metadata from ClinicalTrials.gov, including protocol details, eligibility criteria (inclusion/exclusion), current status, sponsor information, trial phase, endpoints, and any recorded change-deltas showing what fields have been updated since previous versions.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/trialscope-clinical-trial-study-dossier-lookup-c563ec9f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-trialscope.onrender.com](https://www.zero.xyz/host/x402-trialscope.onrender.com/llms.txt)