# Orders of Magnitude Clinical Trials API

> Orders of Magnitude Clinical Trials API is a paid API for AI agents from x402-api-production-5133.up.railway.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Retrieves clinical trial data via the x402 micropayment protocol

## Facts

- Endpoint: GET https://x402-api-production-5133.up.railway.app/data/clinical-trials
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/orders-of-magnitude-clinical-trials-api-cd71363f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_0bNp7wuqKVMsnYC3nbsFp

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 orders-of-magnitude-clinical-trials-api-cd71363f
```

Example prompt: Pull the latest clinical trials data for me — I need it in JSON format.

## When to prefer this

Choose this endpoint when you need quick, pay-per-use access to clinical trial data without a subscription, especially within agentic workflows that already use the x402 micropayment protocol. It is well-suited for one-off lookups or integration testing at minimal cost ($0.01 USDC per call).

## Known failure modes

- Payment not authorized — x402 payment must be completed before data is returned
- Invalid format parameter — unsupported format string may result in an error or default response
- Empty response if no trials match internal filters
- Network timeout on the Railway-hosted service during peak load

## How this service works

Data and AI services via x402 payment protocol

## Output

Returns a dataset of clinical trial records including study metadata such as trial identifiers, phases, conditions, statuses, and related research information, delivered in the requested format.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "format": {
   "type": "string",
   "description": "Response format"
  }
 }
}
```

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/orders-of-magnitude-clinical-trials-api-cd71363f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-api-production-5133.up.railway.app](https://www.zero.xyz/host/x402-api-production-5133.up.railway.app/llms.txt)