Environment & EarthFreeAPI Gateway (Edge Cache)

Air Quality Index APIFree REST Service

The Air Quality Index (AQI) API provides real-time air quality data, including the AQI and specific pollutant concentrations (such as PM2.5, PM10, CO, NO2, SO2, and O3) for various locations around the world. This API helps developers integrate air quality monitoring features into applications, enabling users to make informed decisions regarding their environment and health.

Best for:Full-stack prototyping, developer tooling, production apps, and hackathons.
Direct Public REST Service
Official Documentation
Ctrl + D to bookmark page
Rate Limit
Free (No auth required)
Auth
Gateway (Zero-Setup)
Security & CORS
HTTPS • CORS Enabled
Payload Format
JSON / REST

FreeAPI Smart Gateway Supported (Recommended)

Zero account setup or API key registration needed. Call directly through FreeAPI Smart Edge Gateway with in-memory cache, automatic CORS support, and normalized JSON output.

Auth-Gated

Live Test Console & 3D Assistant

Launch 3D studio to inspect query parameters, authentication headers, or test with your personal developer key.

Quickstart Code Snippets

Copy-paste ready boilerplate for your tech stack.

Bypass browser CORS restrictions. Protected by in-memory RAM cache and automated circuit breaker.
Get Free API Key →
// Call via FreeAPI Smart Edge Gateway (In-Memory Cache + CORS Guard)
// Endpoint: https://findfreeapi.com/api/v1/gateway/air-quality-index-api

async function callAirQualityIndexAPI() {
  try {
    const response = await fetch("https://findfreeapi.com/api/v1/gateway/air-quality-index-api", {
      headers: {
        "Accept": "application/json",
        // "x-freeapi-key": "fapi_live_your_api_key" // FreeAPI Gateway Key
      }
    });

    if (!response.ok) {
      throw new Error(`Gateway HTTP error! status: ${response.status}`);
    }

    const data = await response.json();
    console.log("FreeAPI Live Data:", data);
  } catch (error) {
    console.error("FreeAPI Gateway Error:", error);
  }
}

callAirQualityIndexAPI();
Running this API inside a bot, microservice, or backend daemon?

Share with Devs & GitHub Badge

Share this public endpoint with your team or embed verified status badge in your README.md.

GitHub README.md Badge (Live SVG):
[![Air Quality Index API - Free Public API](https://findfreeapi.com/api/badge/air-quality-index-api?style=flat)](https://findfreeapi.com/en/service/air-quality-index-api?utm_source=github_badge&utm_medium=readme&utm_campaign=readme_badge)

Key Advantages (Pros)

  • Zero-Auth: No API key or registration required to start querying.
  • Documented Rate Limit: Free (No auth required).
  • HTTPS & CORS Enabled: Can be queried directly from client browsers or server backends.

Considerations & Limits (Cons)

  • Rate Limited: Excessive rapid requests may receive HTTP 429 status.
  • Third-party SLA: Service uptime depends on the upstream provider.

Frequently Asked Questions (FAQ)

Technical and integration answers for Air Quality Index API.

Yes, Air Quality Index API is listed as a free endpoint on FreeAPI Directory with an allowance of: Free (No auth required).

GitHub README Verified Badge

Embed this live verified badge in your project or repository.

Preview:Air Quality Index API FreeAPI Verified Badge
[![Air Quality Index API - Free Public API](https://findfreeapi.com/api/badge/air-quality-index-api?style=flat)](https://findfreeapi.com/en/service/air-quality-index-api?utm_source=github_badge&utm_medium=readme&utm_campaign=readme_badge)
Official Service Provider Ownership: Air Quality Index API

All data feeds, trademarks, and documentation belong directly to the original API provider. FreeAPI serves purely as a discovery index and documentation reference for developers.

DMCA / Takedown Request

Top Alternatives in Environment & Earth

Environment & Earth

AirVisual

Global real-time air quality index (AQI) and pollution sensor datasets

FeaturedAPI KEY10.000 req/month
Environment & Earth

OpenAQ

Global community air quality open environmental data platform

FeaturedAPI KEY5000 req/day
Environment & Earth

Carbon Interface

Calculates carbon emissions for flights, vehicle trips, electricity, and shipping

API KEY200 req/month
Environment & Earth

Climatiq

Comprehensive greenhouse gas emission calculations and climate metrics engine

API KEY100 req/day