# World Air Quality Index (WAQI)

**Canonical:** https://apis.io/providers/waqi/  
**Website:** https://waqi.info/  
**APIs profiled:** 3

The World Air Quality Index (WAQI) REST API provides real-time air quality data, AQI readings, pollutant measurements, and station data for more than 12,000 monitoring stations worldwide. The API delivers city-level and station-level air quality index values for pollutants including PM2.5, PM10, NO2, CO, SO2, and Ozone, along with geo-location queries, weather conditions, and 3-8 day forecast data. Access is free for non-commercial use and requires a token obtained from the Air Quality Open Data Platform.

## Kin Score — 41.9 / 100 (developing)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 41.9).

| Facet | Score |
|---|---|
| Discoverability | 74.1 |
| Contract Quality | 65.1 |
| Governance | 9.8 |
| Contract Governance | 9.8 |
| Operational Transparency | 26.3 |
| Developer Ergonomics | 21.4 |
| Commercial Clarity | 39.5 |
| Access Clarity | 39.5 |

Regulatory layer — **Government & Public Sector**: 31.5 (matched via tags).

## Agent readiness — 50.0 (agent-native)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | na |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | na |
| Error Semantics | verified |
| OpenAPI Examples | verified |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | na |

## Access

Freemium · Self-serve signup — onboarding: self-serve, pricing: freemium, trial: no (confidence: high).

## APIs (3)

- **World Air Quality Index (WAQI) Feed API** — Air quality feed endpoints for city, geo, and IP-based queries
- **World Air Quality Index (WAQI) Map API** — Map tile and station boundary queries
- **World Air Quality Index (WAQI) Search API** — Search for monitoring stations by keyword

## Agentic access (1)

- **Waqi Agentic Access** — 5 operations

## Security (2)

- **Waqi Authentication** — apiKey · 1 scheme
- **Waqi Domain Security** — TLSv1.2 · HSTS · DMARC

## Plans (1)

- **Waqi Plans Pricing**

## Tags

Air Quality, AQI, Environment, Pollution, Real-Time Data, Weather, IoT, Open Data

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/waqi/). Scores are computed from the provider's own public artifacts under a published rubric.