# ReefAPI, free: Air quality API

> nearest-station air quality (OpenAQ v3): pollutants + computed AQI-US/EAQI-EU + station distance + measurement freshness, honest insufficient_data when no station

ReefAPI's air quality API on its Free plan. It costs $0.00 per 1,000 places. It returns 3 of the 6 key fields we check: US AQI, Particles, Gases.
We rank 94 plans by price. [OpenWeather's £370 monthly plan](https://datacircle.dev/air-quality-apis/openweather/370-monthly-professional-get-data-2-5-air-pollution/llms.txt) is the cheapest paid plan per 1,000 places: $0.00049.
[WeatherAPI.com](https://datacircle.dev/air-quality-apis/weatherapi-com/7-monthly/llms.txt), [Open-Meteo](https://datacircle.dev/air-quality-apis/open-meteo/99-monthly-api-professional-get-v1-air-quality-air-quality/llms.txt) and [Weatherbit](https://datacircle.dev/air-quality-apis/weatherbit/495-monthly-business-get-v2-0-forecast-airquality/llms.txt) are the best air quality API providers in our benchmark.

- This page: https://datacircle.dev/air-quality-apis/reefapi/free
- [Best air quality API in 2026: pricing compared](https://datacircle.dev/best-air-quality-api.txt)
- Get it: https://reefapi.com/pricing
- Request: `POST https://api.reefapi.com/weather-intel/v1/air_quality`
- API key: with the plan, on https://reefapi.com/pricing
- Its API docs: https://reefapi.com/docs/weather-intel#ep-air_quality
- Sold by: ReefAPI (https://reefapi.com)
- Checked: 2026-10-30

## In the answer

- Completeness: 50%
- US AQI: ✓
- Particles: ✓
- Gases: ✓

## Price

- $ per 1,000 places: $0.00
- Per: call
- Billing: free

## Charges

- Also pays for: from the same budget: 3,551 other calls

## Overage

- Units cap: hard

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: nearest-station air quality (OpenAQ v3): pollutants + computed AQI-US/EAQI-EU + station distance + measurement freshness, honest insufficient_data when no station

## Data

- Freshness: live
- Keep data: no limit
- Use data: You are solely responsible for how you use the data you retrieve and for ensuring your use complies with all applicable laws, third-party terms, and the rights of others (including data-protection, intellectual-property, and anti-spam laws) in your jurisdiction and your users'. You will not use the Service to break the law, infringe rights, send spam, or build a competing bulk-redistribution product. [...] Don't attempt to circumvent authentication, rate limits, or credit metering, don't probe, scan, or stress the Service except your own account within posted limits. [...] Where a source requires attribution, we surface it in the response meta, honor it.

## Plan

- Pay: $0
- You get: 1,000 credits
- Enough for: 1,000 calls
- Expires: never

## Rate limit

- Per second: 10
- Batch: 1

## Speed

- Median: 2.10 s

## The call

- You send: lat, lon. Optional: radius_km
- Method: POST
- Path: /weather-intel/v1/air_quality

## About the plan

- Plan: Free
- Who can get it: anyone

## The 28 fields the plan's answer can hold

PM2.5, PM10, ozone, nitrogen dioxide, sulphur dioxide, carbon monoxide, pollutant unit, pollutant measured at, pollutant reading age, pollutant station, pollutant station distance, pollutant provider, US AQI, US AQI category, US AQI dominant pollutant, EU AQI, EU AQI category, nearest station distance, stations, stale readings skipped, insufficient data, source updated at, fetched at, staleness minutes, stale, confidence, attribution, disclaimer

## ReefAPI's plans (11)

- [ReefAPI, free](https://datacircle.dev/air-quality-apis/reefapi/free/llms.txt): $0.00 per 1,000, 50% complete, live
- [ReefAPI, $15 monthly](https://datacircle.dev/air-quality-apis/reefapi/15-monthly/llms.txt): $1.50 per 1,000, 50% complete, live
- [ReefAPI, $50 monthly](https://datacircle.dev/air-quality-apis/reefapi/50-monthly/llms.txt): $1.00 per 1,000, 50% complete, live
- [ReefAPI, $200 monthly](https://datacircle.dev/air-quality-apis/reefapi/200-monthly/llms.txt): $0.667 per 1,000, 50% complete, live
- [ReefAPI, $33.75 quarterly](https://datacircle.dev/air-quality-apis/reefapi/33-75-quarterly/llms.txt): $1.125 per 1,000, 50% complete, live
- [ReefAPI, $112.50 quarterly](https://datacircle.dev/air-quality-apis/reefapi/112-50-quarterly/llms.txt): $0.75 per 1,000, 50% complete, live
- [ReefAPI, $450 quarterly](https://datacircle.dev/air-quality-apis/reefapi/450-quarterly/llms.txt): $0.50 per 1,000, 50% complete, live
- [ReefAPI, $90 yearly](https://datacircle.dev/air-quality-apis/reefapi/90-yearly/llms.txt): $0.75 per 1,000, 50% complete, live
- [ReefAPI, $300 yearly](https://datacircle.dev/air-quality-apis/reefapi/300-yearly/llms.txt): $0.50 per 1,000, 50% complete, live
- [ReefAPI, $1,200 yearly](https://datacircle.dev/air-quality-apis/reefapi/1200-yearly/llms.txt): $0.333 per 1,000, 50% complete, live
- [ReefAPI, contact us](https://datacircle.dev/air-quality-apis/reefapi/contact-us/llms.txt): 50% complete, live

## ReefAPI's calls for this API (1)

- `POST /weather-intel/v1/air_quality`: [ReefAPI, free](https://datacircle.dev/air-quality-apis/reefapi/free/llms.txt)

## ReefAPI's APIs (44)

- [ReefAPI: company open jobs API pricing, 11 plans, POST /ats-jobs/v1/company_jobs, company_jobs (Ashby)](https://datacircle.dev/company-open-job-apis/reefapi/free-free-post-ats-jobs-v1-company-jobs-company-jobs-ashby/llms.txt)
- [ReefAPI: company open jobs API pricing, 11 plans, POST /glassdoor/v1/employer/jobs](https://datacircle.dev/company-open-job-apis/reefapi/free-free-post-glassdoor-v1-employer-jobs/llms.txt)
- [ReefAPI: company open jobs API pricing, 11 plans, POST /ats-jobs/v1/company_jobs, company_jobs (Greenhouse)](https://datacircle.dev/company-open-job-apis/reefapi/free-free-post-ats-jobs-v1-company-jobs-company-jobs-greenhouse/llms.txt)
- [ReefAPI: company open jobs API pricing, 11 plans, POST /ats-jobs/v1/company_jobs, company_jobs (Lever)](https://datacircle.dev/company-open-job-apis/reefapi/free-free-post-ats-jobs-v1-company-jobs-company-jobs-lever/llms.txt)
- [ReefAPI: company open jobs API pricing, 11 plans, POST /linkedin-jobs/v1/jobs/by-company](https://datacircle.dev/company-open-job-apis/reefapi/free-free-post-linkedin-jobs-v1-jobs-by-company/llms.txt)
- [ReefAPI: company open jobs API pricing, 11 plans, POST /reed/v1/company-jobs](https://datacircle.dev/company-open-job-apis/reefapi/free-free-post-reed-v1-company-jobs/llms.txt)
- [ReefAPI: company open jobs API pricing, 11 plans, POST /seek/v1/company-jobs](https://datacircle.dev/company-open-job-apis/reefapi/free-free-post-seek-v1-company-jobs/llms.txt)
- [ReefAPI: company open jobs API pricing, 11 plans, POST /ats-jobs/v1/company_jobs, company_jobs (Workable)](https://datacircle.dev/company-open-job-apis/reefapi/free-free-post-ats-jobs-v1-company-jobs-company-jobs-workable/llms.txt)
- [ReefAPI: company open jobs API pricing, 11 plans, POST /ziprecruiter/v1/jobs_by_company](https://datacircle.dev/company-open-job-apis/reefapi/free-free-post-ziprecruiter-v1-jobs-by-company/llms.txt)
- [ReefAPI: job posting details API pricing, 11 plans, POST /ats-jobs/v1/job_detail, job_detail (Ashby)](https://datacircle.dev/job-posting-details-apis/reefapi/free-free-post-ats-jobs-v1-job-detail-job-detail-ashby/llms.txt)
- [ReefAPI: job posting details API pricing, 11 plans, POST /global-jobs/v1/jobs/detail, jobs/detail (Catho)](https://datacircle.dev/job-posting-details-apis/reefapi/free-free-post-global-jobs-v1-jobs-detail-jobs-detail-catho/llms.txt)
- [ReefAPI: job posting details API pricing, 11 plans, POST /ats-jobs/v1/job_detail, job_detail (Greenhouse)](https://datacircle.dev/job-posting-details-apis/reefapi/free-free-post-ats-jobs-v1-job-detail-job-detail-greenhouse/llms.txt)
- [ReefAPI: job posting details API pricing, 11 plans, POST /global-jobs/v1/jobs/detail, jobs/detail (Gupy)](https://datacircle.dev/job-posting-details-apis/reefapi/free-free-post-global-jobs-v1-jobs-detail-jobs-detail-gupy/llms.txt)
- [ReefAPI: job posting details API pricing, 11 plans, POST /indeed/v1/job](https://datacircle.dev/job-posting-details-apis/reefapi/free-free-post-indeed-v1-job/llms.txt)
- [ReefAPI: job posting details API pricing, 11 plans, POST /ats-jobs/v1/job_detail, job_detail (Lever)](https://datacircle.dev/job-posting-details-apis/reefapi/free-free-post-ats-jobs-v1-job-detail-job-detail-lever/llms.txt)
- [ReefAPI: job posting details API pricing, 11 plans, POST /reed/v1/detail](https://datacircle.dev/job-posting-details-apis/reefapi/free-free-post-reed-v1-detail/llms.txt)
- [ReefAPI: job posting details API pricing, 11 plans, POST /seek/v1/detail](https://datacircle.dev/job-posting-details-apis/reefapi/free-free-post-seek-v1-detail/llms.txt)
- [ReefAPI: job posting details API pricing, 11 plans, POST /global-jobs/v1/jobs/detail, jobs/detail (StepStone)](https://datacircle.dev/job-posting-details-apis/reefapi/free-free-post-global-jobs-v1-jobs-detail-jobs-detail-stepstone/llms.txt)
- [ReefAPI: job posting details API pricing, 11 plans, POST /ats-jobs/v1/job_detail, job_detail (Workable)](https://datacircle.dev/job-posting-details-apis/reefapi/free-free-post-ats-jobs-v1-job-detail-job-detail-workable/llms.txt)
- [ReefAPI: job posting details API pricing, 11 plans, POST /ziprecruiter/v1/job_detail](https://datacircle.dev/job-posting-details-apis/reefapi/free-free-post-ziprecruiter-v1-job-detail/llms.txt)
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- [ReefAPI: AutoScout24 search API pricing, 11 plans](https://datacircle.dev/autoscout24-search-apis/reefapi/free/llms.txt)
- [ReefAPI: news API pricing, 11 plans, POST /bing/v1/news](https://datacircle.dev/news-apis/reefapi/free/llms.txt)
- [ReefAPI: news API pricing, 11 plans, POST /news-article/v1/news_search](https://datacircle.dev/news-apis/reefapi/free-post-news-article-v1-news-search/llms.txt)
- [ReefAPI: news API pricing, 11 plans, POST /news-intel/v1/search](https://datacircle.dev/news-apis/reefapi/free-post-news-intel-v1-search/llms.txt)
- [ReefAPI: SERP API pricing, 11 plans](https://datacircle.dev/serp-apis/reefapi/free-free-post-bing-v1-search/llms.txt)
- [ReefAPI: video search API pricing, 11 plans](https://datacircle.dev/video-search-apis/reefapi/free/llms.txt)
- [ReefAPI: Bring a Trailer lot API pricing, 11 plans](https://datacircle.dev/bring-a-trailer-lot-apis/reefapi/free/llms.txt)
- [ReefAPI: Bring a Trailer search API pricing, 11 plans](https://datacircle.dev/bring-a-trailer-search-apis/reefapi/free/llms.txt)
- [ReefAPI: CarGurus listing API pricing, 11 plans](https://datacircle.dev/cargurus-listing-apis/reefapi/free/llms.txt)
- [ReefAPI: CarGurus search API pricing, 11 plans](https://datacircle.dev/cargurus-search-apis/reefapi/free/llms.txt)
- [ReefAPI: job postings API pricing, 11 plans, POST /global-jobs/v1/jobs/search, jobs/search (Catho)](https://datacircle.dev/job-posting-apis/reefapi/free-free-post-global-jobs-v1-jobs-search-jobs-search-catho/llms.txt)
- [ReefAPI: job postings API pricing, 11 plans, POST /global-jobs/v1/jobs/search, jobs/search (Gupy)](https://datacircle.dev/job-posting-apis/reefapi/free-free-post-global-jobs-v1-jobs-search-jobs-search-gupy/llms.txt)
- [ReefAPI: job postings API pricing, 11 plans, POST /indeed/v1/jobs/search](https://datacircle.dev/job-posting-apis/reefapi/free-free-post-indeed-v1-jobs-search/llms.txt)
- [ReefAPI: job postings API pricing, 11 plans, POST /global-jobs/v1/jobs/search, jobs/search (StepStone)](https://datacircle.dev/job-posting-apis/reefapi/free-free-post-global-jobs-v1-jobs-search-jobs-search-stepstone/llms.txt)
- [ReefAPI: job postings API pricing, 11 plans, POST /ats-jobs/v1/search](https://datacircle.dev/job-posting-apis/reefapi/free-free-post-ats-jobs-v1-search/llms.txt)
- [ReefAPI: job postings API pricing, 11 plans, POST /ziprecruiter/v1/search](https://datacircle.dev/job-posting-apis/reefapi/free-free-post-ziprecruiter-v1-search/llms.txt)
- [ReefAPI: job postings API pricing, 11 plans, POST /seek/v1/classification](https://datacircle.dev/job-posting-apis/reefapi/free-free-post-seek-v1-classification/llms.txt)
- [ReefAPI: job postings API pricing, 11 plans, POST /reed/v1/search](https://datacircle.dev/job-posting-apis/reefapi/free-free-post-reed-v1-search/llms.txt)
- [ReefAPI: job postings API pricing, 11 plans, POST /seek/v1/search](https://datacircle.dev/job-posting-apis/reefapi/free-free-post-seek-v1-search/llms.txt)
- [ReefAPI: job postings API pricing, 11 plans, POST /reed/v1/sector](https://datacircle.dev/job-posting-apis/reefapi/free-free-post-reed-v1-sector/llms.txt)
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- [ReefAPI: company enrichment API pricing, 11 plans, POST /glassdoor/v1/employer/detail](https://datacircle.dev/company-enrichment-apis/reefapi/free-free-post-glassdoor-v1-employer-detail/llms.txt)
- [ReefAPI: company enrichment API pricing, 11 plans, POST /indeed/v1/company](https://datacircle.dev/company-enrichment-apis/reefapi/free-free-post-indeed-v1-company/llms.txt)
- [ReefAPI: company enrichment API pricing, 11 plans, POST /enrich-company/v1/company_domain](https://datacircle.dev/company-enrichment-apis/reefapi/free/llms.txt)
- [ReefAPI: company enrichment API pricing, 11 plans, POST /google-maps/v1/place/by-id](https://datacircle.dev/company-enrichment-apis/reefapi/free-free-post-google-maps-v1-place-by-id/llms.txt)
- [ReefAPI: company enrichment API pricing, 11 plans, POST /google-maps/v1/place/detail](https://datacircle.dev/company-enrichment-apis/reefapi/free-free-post-google-maps-v1-place-detail/llms.txt)
- [ReefAPI: Glassdoor review API pricing, 11 plans](https://datacircle.dev/glassdoor-review-apis/reefapi/free/llms.txt)
- [ReefAPI: IAAI lot API pricing, 11 plans](https://datacircle.dev/iaai-lot-apis/reefapi/free/llms.txt)
- [ReefAPI: company discovery API pricing, 11 plans, POST /indeed/v1/company/search](https://datacircle.dev/company-discovery-apis/reefapi/free-free-post-indeed-v1-company-search/llms.txt)
- [ReefAPI: company discovery API pricing, 11 plans, POST /google-maps/v1/place/nearby](https://datacircle.dev/company-discovery-apis/reefapi/free-free-post-google-maps-v1-place-nearby/llms.txt)
- [ReefAPI: company discovery API pricing, 11 plans, POST /google-maps/v1/place/search](https://datacircle.dev/company-discovery-apis/reefapi/free-free-post-google-maps-v1-place-search/llms.txt)
- [ReefAPI: Instagram post API pricing, 11 plans](https://datacircle.dev/instagram-post-apis/reefapi/free/llms.txt)
- [ReefAPI: Instagram profile API pricing, 11 plans](https://datacircle.dev/instagram-profile-apis/reefapi/free/llms.txt)
- [ReefAPI: LinkedIn company data API pricing, 11 plans](https://datacircle.dev/linkedin-company-profile-apis/reefapi/free/llms.txt)
- [ReefAPI: LinkedIn job details API pricing, 11 plans](https://datacircle.dev/linkedin-job-details-apis/reefapi/free/llms.txt)
- [ReefAPI: similar jobs API pricing, 11 plans](https://datacircle.dev/similar-job-apis/reefapi/free/llms.txt)
- [ReefAPI: LinkedIn job search API pricing, 11 plans](https://datacircle.dev/linkedin-job-search-apis/reefapi/free/llms.txt)
- [ReefAPI: mobile.de listing API pricing, 11 plans](https://datacircle.dev/mobile-de-listing-apis/reefapi/free/llms.txt)
- [ReefAPI: mobile.de search API pricing, 11 plans](https://datacircle.dev/mobile-de-search-apis/reefapi/free/llms.txt)
- [ReefAPI: Reddit post API pricing, 11 plans](https://datacircle.dev/reddit-post-apis/reefapi/free/llms.txt)
- [ReefAPI: Reddit profile API pricing, 11 plans](https://datacircle.dev/reddit-profile-apis/reefapi/free/llms.txt)
- [ReefAPI: air quality API pricing, 11 plans](https://datacircle.dev/air-quality-apis/reefapi/free/llms.txt)
- [ReefAPI: current weather API pricing, 11 plans](https://datacircle.dev/current-weather-apis/reefapi/free/llms.txt)
- [ReefAPI: email verification API pricing, 11 plans](https://datacircle.dev/validate-email-apis/reefapi/free/llms.txt)
- [ReefAPI: weather forecast API pricing, 11 plans](https://datacircle.dev/weather-forecast-apis/reefapi/free/llms.txt)
- [ReefAPI: Snapchat profile API pricing, 11 plans](https://datacircle.dev/snapchat-profile-apis/reefapi/free/llms.txt)
- [ReefAPI: Threads post API pricing, 11 plans](https://datacircle.dev/threads-post-apis/reefapi/free/llms.txt)
- [ReefAPI: Threads profile API pricing, 11 plans](https://datacircle.dev/threads-profile-apis/reefapi/free/llms.txt)
- [ReefAPI: Trustpilot review API pricing, 11 plans](https://datacircle.dev/trustpilot-review-apis/reefapi/free/llms.txt)
- [ReefAPI: Twitch profile API pricing, 11 plans](https://datacircle.dev/twitch-profile-apis/reefapi/free/llms.txt)
- [ReefAPI: Twitch video API pricing, 11 plans](https://datacircle.dev/twitch-video-apis/reefapi/free/llms.txt)
- [ReefAPI: X post API pricing, 11 plans](https://datacircle.dev/x-post-apis/reefapi/free/llms.txt)
- [ReefAPI: phone validation API pricing, 11 plans, POST /phone-validate/v1/batch](https://datacircle.dev/validate-phone-apis/reefapi/free-post-phone-validate-v1-batch/llms.txt)
- [ReefAPI: phone validation API pricing, 11 plans, POST /phone-validate/v1/validate](https://datacircle.dev/validate-phone-apis/reefapi/free-post-phone-validate-v1-validate/llms.txt)
- [ReefAPI: YouTube channel API pricing, 11 plans, POST /youtube/v1/channel](https://datacircle.dev/youtube-channel-apis/reefapi/free-post-youtube-v1-channel/llms.txt)
- [ReefAPI: YouTube channel API pricing, 11 plans, POST /youtube/v1/channel_about](https://datacircle.dev/youtube-channel-apis/reefapi/free-post-youtube-v1-channel-about/llms.txt)
- [ReefAPI: YouTube channel video API pricing, 11 plans, POST /youtube/v1/channel_shorts](https://datacircle.dev/youtube-channel-video-apis/reefapi/free-post-youtube-v1-channel-shorts/llms.txt)
- [ReefAPI: YouTube channel video API pricing, 11 plans, POST /youtube/v1/channel_videos](https://datacircle.dev/youtube-channel-video-apis/reefapi/free-post-youtube-v1-channel-videos/llms.txt)
- [ReefAPI: X profile API pricing, 11 plans, POST /twitter/v1/profile](https://datacircle.dev/x-profile-apis/reefapi/free-post-twitter-v1-profile/llms.txt)
- [ReefAPI: X profile API pricing, 11 plans, POST /twitter/v1/user_by_id](https://datacircle.dev/x-profile-apis/reefapi/free-post-twitter-v1-user-by-id/llms.txt)

## ReefAPI: air quality API alternatives

- [WeatherAPI.com, $65 monthly](https://datacircle.dev/air-quality-apis/weatherapi-com/65-monthly/llms.txt): $0.0065 per 1,000, 50% complete, live
- [Botoi, $9 monthly](https://datacircle.dev/air-quality-apis/botoi/9-monthly/llms.txt): $0.03 per 1,000, 67% complete, live
- [Open-Meteo, €29 monthly, API Standard, GET /v1/air-quality, Air quality, full](https://datacircle.dev/air-quality-apis/open-meteo/29-monthly-api-standard-get-v1-air-quality-air-quality-full/llms.txt): $0.098 per 1,000, 100% complete, live
- [Seniverse, CNY 999 pack, Visit pack 500,000 (访问量套餐), GET /v3/air/now.json](https://datacircle.dev/air-quality-apis/seniverse/cny-999-pack-visit-pack-500000-get-v3-air-now-json/llms.txt): $0.299 per 1,000, 33% complete, live

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-10-30.

- https://reefapi.com
- https://reefapi.com/_next/static/chunks/app/pricing/page-560e08c02e869119.js
- https://reefapi.com/docs
- https://reefapi.com/docs/weather-intel
- https://reefapi.com/docs/weather-intel.md
- https://reefapi.com/pricing
- https://reefapi.com/refunds
- https://reefapi.com/terms