# Clinical Trials Search — The Stall x402

> Clinical Trials Search — The Stall x402 is a paid API for AI agents from the-stall.intuitek.ai, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).

Search active and historical clinical trials by condition, phase, status, sponsor, or intervention using the ClinicalTrials.gov data feed, paid per-call with USDC.

## Facts

- Endpoint: GET https://the-stall.intuitek.ai/cap/clinical-trials
- 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-trials-search-the-stall-x402-498ec228
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_OQwLiEZLtO10srssSxPph

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-trials-search-the-stall-x402-498ec228
```

Example prompt: Find me up to 20 currently recruiting phase 3 clinical trials for lung cancer, and filter by the intervention 'pembrolizumab' — show me what's out there.

## When to prefer this

Use this endpoint when an agent needs to search clinical trial data programmatically without setting up API keys or accounts, and is willing to pay $0.005 USDC per call. Ideal for healthcare research assistants, patient-facing agents looking for trial eligibility, or pharma/biotech research workflows. Prefer over direct ClinicalTrials.gov API if payment-native x402 flow is already in use.

## Known failure modes

- No trials found for obscure or misspelled condition — returns empty results
- Invalid phase enum value — schema validation error
- Condition parameter missing — request rejected as required field
- Limit exceeds 50 — clamped or rejected
- Payment failure via x402 — 402 response with payment details required
- Upstream ClinicalTrials.gov API unavailable — 503 or timeout

## How this service works

Search ClinicalTrials.gov for clinical studies by condition, intervention, or keyword. Returns phase, status, enrollment, sponsor, and dates. NIH primary source — no markup. $0.005/call.

## Output

A list of up to 50 clinical trial records matching the query, including trial identifiers, title, phase, recruitment status, sponsor, interventions, and conditions. Results are drawn from ClinicalTrials.gov data.

## Example request

```json
{
 "input": {
  "type": "http",
  "method": "GET",
  "queryParams": {
   "limit": 10,
   "status": "recruiting",
   "condition": "diabetes"
  }
 }
}
```

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/clinical-trials-search-the-stall-x402-498ec228/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from the-stall.intuitek.ai](https://www.zero.xyz/host/the-stall.intuitek.ai/llms.txt)