# Botoi, free: Air quality API

> Returns the current Air Quality Index (both US EPA and European scales) and individual pollutant concentrations for a given latitude and longitude. Pollutants include PM2.5, PM10, carbon monoxide, nitrogen dioxide, sulphur dioxide, and ozone.

Botoi's air quality API on its Free plan. It costs $0.00 per 1,000 places. It returns 4 of the 6 key fields we check: US AQI, European 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/botoi/free
- [Best air quality API in 2026: pricing compared](https://datacircle.dev/best-air-quality-api.txt)
- Get it: https://botoi.com/pricing/
- Request: `POST https://api.botoi.com/v1/air-quality/check`
- API key: with the plan, on https://botoi.com/pricing/
- Its API docs: https://botoi.com/api/lookup/air-quality-check/
- Sold by: Botoi (https://botoi.com)
- Checked: 2026-10-30

## In the answer

- Completeness: 67%
- US AQI: ✓
- European AQI: ✓
- Particles: ✓
- Gases: ✓

## Price

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

## Charges

- Also pays for: from the same budget: 150 other calls

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Returns the current Air Quality Index (both US EPA and European scales) and individual pollutant concentrations for a given latitude and longitude. Pollutants include PM2.5, PM10, carbon monoxide, nitrogen dioxide, sulphur dioxide, and ozone.

## Data

- Freshness: live
- Keep data: no limit
- Use data: By obtaining and using an API key, You agree to: Keep Your API key confidential and not share it with unauthorized parties, Not exceed the rate limits associated with Your plan tier, Not use the API for any unlawful purpose or to transmit harmful content, Not attempt to circumvent authentication, rate limiting, or other security measures, Not resell or redistribute API access without prior written consent from the Company

## Plan

- Pay: $0
- You get: 1,000 requests a day
- Enough for: 1,000 calls a day
- Expires: resets daily at midnight UTC

## Rate limit

- Per day: 1,000
- Per second: 0.17
- Batch: 1

## The call

- You send: lat, lng
- Method: POST
- Path: /v1/air-quality/check

## About the plan

- Plan: Free
- Who can get it: anyone 18 or older

## The 14 fields the plan's answer can hold

success, latitude, longitude, US AQI, European AQI, AQI category, PM2.5, PM10, carbon monoxide, nitrogen dioxide, sulphur dioxide, ozone, request ID, time taken

## Botoi's plans (4)

- [Botoi, free](https://datacircle.dev/air-quality-apis/botoi/free/llms.txt): $0.00 per 1,000, 67% complete, live
- [Botoi, $9 monthly](https://datacircle.dev/air-quality-apis/botoi/9-monthly/llms.txt): $0.03 per 1,000, 67% complete, live
- [Botoi, $49 monthly](https://datacircle.dev/air-quality-apis/botoi/49-monthly/llms.txt): $0.016 per 1,000, 67% complete, live
- [Botoi, $199 monthly](https://datacircle.dev/air-quality-apis/botoi/199-monthly/llms.txt): $0.0066 per 1,000, 67% complete, live

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

- `POST /v1/air-quality/check`: [Botoi, free](https://datacircle.dev/air-quality-apis/botoi/free/llms.txt)

## Botoi's APIs (5)

- [Botoi: air quality API pricing, 4 plans](https://datacircle.dev/air-quality-apis/botoi/free/llms.txt)
- [Botoi: tech stack API pricing, 4 plans](https://datacircle.dev/company-technology-apis/botoi/free/llms.txt)
- [Botoi: current weather API pricing, 4 plans](https://datacircle.dev/current-weather-apis/botoi/free/llms.txt)
- [Botoi: phone validation API pricing, 4 plans](https://datacircle.dev/validate-phone-apis/botoi/free/llms.txt)
- [Botoi: email verification API pricing, 4 plans, POST /v1/disposable-email/check](https://datacircle.dev/validate-email-apis/botoi/free-post-v1-disposable-email-check/llms.txt)
- [Botoi: email verification API pricing, 4 plans, POST /v1/email-mx/verify](https://datacircle.dev/validate-email-apis/botoi/free-post-v1-email-mx-verify/llms.txt)
- [Botoi: email verification API pricing, 4 plans, POST /v1/email/validate](https://datacircle.dev/validate-email-apis/botoi/free-post-v1-email-validate/llms.txt)

## Botoi: 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
- [Seniverse, CNY 6,000 pack, Extra visits 100,000,000 (额外访问量), GET /v3/air/now.json](https://datacircle.dev/air-quality-apis/seniverse/cny-6000-pack-extra-visits-100000000-get-v3-air-now-json/llms.txt): $0.009 per 1,000, 33% complete, live
- [Open-Meteo, €1,760 yearly, API Professional (10 million calls), GET /v1/air-quality, Air quality](https://datacircle.dev/air-quality-apis/open-meteo/1760-yearly-api-professional-10-million-calls-get-v1-air-quality-air-quality/llms.txt): $0.017 per 1,000, 100% 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

## 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://api.botoi.com/openapi.json
- https://botoi.com/
- https://botoi.com/api/lookup/air-quality-check/
- https://botoi.com/llms.txt
- https://botoi.com/pricing/
- https://botoi.com/terms/