# SYNTHORA Air Quality Index

> SYNTHORA Air Quality Index is a paid API for AI agents from air_quality.hergertsynthora.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).

Returns real-time air quality metrics (PM2.5, PM10, ozone, NO2, European AQI) for a given latitude/longitude coordinate via Open-Meteo.

## Facts

- Endpoint: POST https://air_quality.hergertsynthora.com/service
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synthora-air-quality-index-4c1e4285
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Xv7vuBM9UW9ysgyyUeLdh

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 synthora-air-quality-index-4c1e4285 -d '<json body>'
```

Example prompt: What's the current air quality at latitude 40.7128, longitude -74.0060? I need PM2.5, PM10, ozone, NO2, and the European AQI reading right now.

## When to prefer this

Choose this endpoint when you need real-time, multi-pollutant air quality data (PM2.5, PM10, ozone, NO2, European AQI) for any global coordinate without managing an API key. It is ideal for agents needing quick, pay-per-call environmental lookups at low cost ($0.001 USDC) without a subscription.

## Known failure modes

- Invalid or out-of-range latitude/longitude values may return an error or empty result
- Open-Meteo upstream outage may cause the service to be unavailable
- Coordinates over ocean areas or remote regions may have limited or no sensor coverage
- Missing required latitude or longitude fields returns a validation error

## How this service works

Real-time air quality (PM2.5, PM10, ozone, NO2, European AQI) for any lat/lon via Open-Meteo. Free, no key. $0.01 USDC via x402 on Base.

## Output

A JSON object with an 'ok' boolean and a 'result' object containing real-time air quality readings for the requested coordinate, including PM2.5, PM10, ozone (O3), nitrogen dioxide (NO2), and the European AQI score, sourced from Open-Meteo's air quality API.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "latitude": {
   "type": "number",
   "description": "latitude"
  },
  "longitude": {
   "type": "number",
   "description": "longitude"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "niche": "air_quality",
  "result": {}
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/synthora-air-quality-index-4c1e4285/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from air_quality.hergertsynthora.com](https://www.zero.xyz/host/air_quality.hergertsynthora.com/llms.txt)