Environment & EarthKey RequiredFeatured

OpenAQ

Global community air quality open environmental data platform

Best for:Full-stack prototyping, developer tooling, production apps, and hackathons.
Verified: March 2026 • 200 OK
Official Documentation
Rate Limit
5000 req/day
Auth
External Key
Security & CORS
HTTPS • CORS Enabled
Payload Format
JSON / REST

External Provider Registration Required

This service is protected by the provider and mandates an external developer account and API key. Grab your key from the official docs or browse our Zero-Setup Gateway Ready catalog for instant alternatives.

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/openaq-environment

async function callOpenAQ() {
  try {
    const response = await fetch("https://findfreeapi.com/api/v1/gateway/openaq-environment", {
      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);
  }
}

callOpenAQ();

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):
[![OpenAQ - Free Public API](https://findfreeapi.com/api/badge/openaq-environment?style=flat)](https://findfreeapi.com/?utm_source=github_badge&utm_medium=readme&utm_campaign=badge_backlink)

Key Advantages (Pros)

  • Free Tier Available: Developers can test and build without entering credit card details.
  • Documented Rate Limit: 5000 req/day.
  • HTTPS & CORS Enabled: Can be queried directly from client browsers or server backends.

Considerations & Limits (Cons)

  • External Key Required: Requires creating an account with the provider.
  • 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 OpenAQ.

Yes, OpenAQ is listed as a free endpoint on FreeAPI Directory with an allowance of: 5000 req/day.

GitHub README Verified Badge

Embed this live verified badge in your project or repository.

Preview:OpenAQ FreeAPI Verified Badge
[![OpenAQ - Free Public API](https://findfreeapi.com/api/badge/openaq-environment?style=flat)](https://findfreeapi.com/?utm_source=github_badge&utm_medium=readme&utm_campaign=badge_backlink)
Official Service Provider Ownership: OpenAQ

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