# NexusAPI Heart Rate Health Check

> NexusAPI Heart Rate Health Check is a paid API for AI agents from nexus-api-virid.vercel.app, paid per call via x402, $0.122923/call, status unknown (last checked 2026-09-15).

Returns heart rate or health/vitals data based on a query input, served via pay-per-call on Base USDC

## Facts

- Endpoint: POST https://nexus-api-virid.vercel.app/api/health/heart-rate
- Price: $0.122923/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/nexusapi-heart-rate-health-check-e3a75344
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_uMS01xMXxkuKYQf6Np_Vv

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 nexusapi-heart-rate-health-check-e3a75344 -d '<json body>'
```

Example prompt: Can you fetch heart rate health data for 'resting adult male' using the NexusAPI health endpoint and tell me what vitals or metrics come back?

## When to prefer this

Choose this endpoint when you need quick, pay-per-call access to heart rate or cardiovascular health data without managing API keys, and you are operating in a USDC-on-Base payment environment. Best suited for lightweight, single-call health metric lookups rather than continuous monitoring streams.

## Known failure modes

- Vague or unsupported query string returns empty or generic response
- Payment failure in USDC on Base causes 402 error before data is returned
- Malformed JSON input returns 400 validation error
- Endpoint unavailability or cold-start on Vercel returns 503 or timeout
- Query outside health domain may return irrelevant or null data

## 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 an object containing heart rate or health-related metrics corresponding to the query string provided. Exact fields depend on query context but likely include numeric rate values, ranges, or health status indicators.

## 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/nexusapi-heart-rate-health-check-e3a75344/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from nexus-api-virid.vercel.app](https://www.zero.xyz/host/nexus-api-virid.vercel.app/llms.txt)