World Air Quality Index (WAQI) website screenshot

World Air Quality Index (WAQI)

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.

World Air Quality Index (WAQI) publishes 3 APIs on the APIs.io network: Feed API, Map API, and Search API. Tagged areas include Air Quality, AQI, Environment, Pollution, and Real-Time Data.

The World Air Quality Index (WAQI) catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

World Air Quality Index (WAQI)’s developer surface includes authentication, documentation, pricing, and 8 more developer resources.

🌐 Visit website 📡 Source on GitHub
45.1/100 developing ▬ flat Agent 44/100 agent ready Full breakdown ↓
scored 2026-07-28 · rubric v0.6
AccessFreemiumSelf serve⚡ Free to try
3 APIs
Air QualityAQIEnvironmentPollutionReal-Time DataWeatherIoTOpen Data

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6
Composite quality — 45.1/100 · developing
Contract Quality 17.8 / 25
Developer Ergonomics 3.9 / 20
Commercial Clarity 7.9 / 20
Operational Transparency 3.4 / 13
Governance 7.0 / 12
Discoverability 7.4 / 10
Agent readiness — 44/100 · agent ready
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 8 / 8
Request/Response Examples 7 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 0 / 4
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/waqi: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 3

Individual APIs this provider publishes, each with its own machine-readable definition.

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

Pricing Plans 1

Published pricing tiers and plan structures.

Waqi Plans Pricing

2 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Waqi Rate Limits

2 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Waqi Finops

FINOPS

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Waqi Context

3 classes · 44 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

World Air Quality Index (WAQI) API Rules

6 rules · 5 warnings 1 info

SPECTRAL

JSON Schema 1

Standalone JSON Schema definitions for this provider's data models.

WAQI Feed Response

2 properties

JSON SCHEMA

Examples 3

Example request and response payloads for these APIs.

City Feed Response

2 fields

EXAMPLE

Map Bounds Response

2 fields

EXAMPLE

Search Response

2 fields

EXAMPLE

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Waqi Authentication

apiKey · 1 scheme

SECURITY

Waqi Domain Security

TLSv1.2 · HSTS · DMARC

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Waqi Agentic Access

5 operations

5 operations · 0 acting

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrg
GitHubOrg

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity
 Authentication
Authentication

Operate 1

Status, limits, changes, and where to get help

RateLimits
RateLimits

Commercial 3

Pricing, plans, and the legal terms of use

Pricing
Pricing
 Plans
Plans
 FinOps
FinOps

Company 2

The organization behind the API

Website
Website
 Website
Website

Source (apis.yml)

apis.yml Raw ↑ 
aid: waqi
name: World Air Quality Index (WAQI)
description: '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.

  '
type: Index
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/waqi.png
url: https://raw.githubusercontent.com/api-evangelist/waqi/refs/heads/main/apis.yml
created: '2026-06-13'
modified: '2026-06-13'
specificationVersion: '0.19'
tags:
- Air Quality
- AQI
- Environment
- Pollution
- Real-Time Data
- Weather
- IoT
- Open Data
apis:
- aid: waqi:waqi-feed-api
  name: World Air Quality Index (WAQI) Feed API
  description: Air quality feed endpoints for city, geo, and IP-based queries
  humanURL: https://aqicn.org/api/
  baseURL: https://api.waqi.info
  tags:
  - Feed
  properties:
  - type: OpenAPI
    url: openapi/waqi-feed-api-openapi.yml
  - type: Documentation
    url: https://aqicn.org/json-api/doc/
  - type: Authentication
    url: https://aqicn.org/data-platform/token/
- aid: waqi:waqi-map-api
  name: World Air Quality Index (WAQI) Map API
  description: Map tile and station boundary queries
  humanURL: https://aqicn.org/api/
  baseURL: https://api.waqi.info
  tags:
  - Map
  properties:
  - type: OpenAPI
    url: openapi/waqi-map-api-openapi.yml
  - type: Documentation
    url: https://aqicn.org/json-api/doc/
  - type: Authentication
    url: https://aqicn.org/data-platform/token/
- aid: waqi:waqi-search-api
  name: World Air Quality Index (WAQI) Search API
  description: Search for monitoring stations by keyword
  humanURL: https://aqicn.org/api/
  baseURL: https://api.waqi.info
  tags:
  - Search
  properties:
  - type: OpenAPI
    url: openapi/waqi-search-api-openapi.yml
  - type: Documentation
    url: https://aqicn.org/json-api/doc/
  - type: Authentication
    url: https://aqicn.org/data-platform/token/
common:
- type: AgenticAccess
  url: agentic-access/waqi-agentic-access.yml
- type: DomainSecurity
  url: security/waqi-domain-security.yml
- type: Authentication
  url: authentication/waqi-authentication.yml
- type: Website
  url: https://waqi.info/
- type: Website
  url: https://aqicn.org/
- type: Documentation
  url: https://aqicn.org/json-api/doc/
- type: GitHubOrg
  url: https://github.com/waqi-dev-community
- type: Pricing
  url: https://aqicn.org/api/
- type: Plans
  url: plans/waqi-plans-pricing.yml
- type: RateLimits
  url: rate-limits/waqi-rate-limits.yml
- type: FinOps
  url: finops/waqi-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com