# SYNTHORA Air Quality

> SYNTHORA Air Quality is a paid API for AI agents from api.hergertsynthora.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Returns live air quality data (PM2.5, PM10, ozone, NO2, EU/US AQI) plus a WHO-threshold operational verdict for any city or lat/lon coordinate

## Facts

- Endpoint: POST https://api.hergertsynthora.com/v1/air-quality
- 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/synthora-air-quality-21290499
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_aHRx-K_vRDn0i7LY-QCXI

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-21290499 -d '<json body>'
```

Example prompt: What's the current air quality in Berlin right now? I need PM2.5, PM10, ozone, and NO2 levels plus the EU and US AQI scores and a WHO safety verdict so I know if outdoor conditions are acceptable.

## When to prefer this

Choose this endpoint when you need a unified air quality snapshot with both EU and US AQI standards plus a WHO-grounded safety verdict in a single call, without managing API keys or per-user credentials. Preferred over raw weather APIs that lack pollutant-level detail, and over paid commercial air quality services when cost-per-call minimization matters. Best for health, logistics, outdoor scheduling, or environmental compliance use cases requiring real-time data globally.

## Known failure modes

- City name not recognized or ambiguous — agent should retry with explicit lat/lon coordinates
- Location outside CAMS/Copernicus coverage area — may return null or incomplete pollutant values
- Upstream Open-Meteo API temporarily unavailable — returns a 5xx or timeout error
- Malformed input (missing city or coordinates) — returns a 400-level validation error
- Payment failure or insufficient USDC balance for x402 micropayment — call blocked before execution

## How this service works

SYNTHORA air-quality: live air quality for any city or lat,lon — PM2.5/PM10/ozone/NO2, EU and US AQI, and a WHO-threshold operational verdict (good/moderate/harmful). Source: open-meteo Air Quality (CAMS/ESA Copernicus), free, no key. $0.005 USDC x402 Base.

## Output

Returns real-time concentrations for PM2.5, PM10, ozone, and NO2 at the requested location, along with EU AQI and US AQI index values and a WHO-threshold operational verdict categorized as good, moderate, or harmful.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "input": {
   "type": "string",
   "description": "SYNTHORA air-quality: live air quality for any city or lat,lon — PM2.5/PM10/ozone/NO2, EU and US AQI, and a WHO-threshold operational verdict (good/moderate/harmful). Source: open-meteo Air Quality (C"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/synthora-air-quality-21290499/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.hergertsynthora.com](https://www.zero.xyz/host/api.hergertsynthora.com/llms.txt)