# ApexAPI Health Symptoms Checker

> ApexAPI Health Symptoms Checker is a paid API for AI agents from apex-api-gamma.vercel.app, paid per call via x402, $0.072427/call, status unknown (last checked 2026-09-15).

Accepts a symptom-related query and returns health information or possible diagnoses based on the described symptoms

## Facts

- Endpoint: POST https://apex-api-gamma.vercel.app/api/health/symptoms
- Price: $0.072427/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/apexapi-health-symptoms-checker-531973b3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_-E7U-9QLgV0WpJ1qz3Ae3

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 apexapi-health-symptoms-checker-531973b3 -d '<json body>'
```

Example prompt: I've had a persistent headache, mild fever, and stiff neck for two days — can you check what conditions or illnesses might match those symptoms?

## When to prefer this

Use this endpoint when an agent needs to quickly look up health conditions or possible diagnoses based on described symptoms without requiring an API key, paying per call in USDC on Base via x402 protocol. Prefer this over self-hosted solutions when a lightweight, pay-as-you-go symptoms lookup is needed.

## Known failure modes

- Empty or missing query field returns an error or empty results
- Overly vague queries may return generic or low-relevance health information
- Service may be unavailable if the underlying data provider is down
- Payment of 0.072427 USDC per call must succeed or the request is rejected with a 402 status
- Highly specific or rare symptom combinations may not return useful matches

## How this service works

Crypto, AI, Social Media, Finance, Weather, Tools &amp; more. Pay per call in USDC on Base. No API keys.

## Output

Returns health information or a list of possible conditions and relevant details matching the submitted symptom query, structured as a JSON response object.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "query": {
   "type": "string",
   "description": "Search query or input parameter"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "description": "API response data"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/apexapi-health-symptoms-checker-531973b3/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from apex-api-gamma.vercel.app](https://www.zero.xyz/host/apex-api-gamma.vercel.app/llms.txt)