Internet of Things (IoT)8 Verified APIs

Free Internet of Things (IoT) APIs

Sensor telemetry, smart home devices, and embedded hardware APIs

Internet of Things (IoT) API Comparison Overview

Top Endpoints

API Service	Auth Type	Rate Limit	Security	Direct Link
Home Assistant	Free Key	Sınırsız	HTTPS • CORS	Docs
IFTTT	Free Key	Değişken	HTTPS • CORS	Docs
Philips Hue	Free Key	10 istek/sn	HTTPS • CORS	Docs
ThingSpeak	Free Key	15 sn aralık	HTTPS • CORS	Docs
Blynk	Free Key	10.000 istek/ay	HTTPS • CORS	Docs
Particle	Free Key	Değişken	HTTPS • CORS	Docs

Available Endpoints (8)

GET

Home Assistant

Open-source local smart home automation, sensor states, and switch relays

Internet of Things (IoT)API KeyCORSUnlimited

GET

IFTTT

Connect web services, trigger multi-step applets, and automate IoT devices

Internet of Things (IoT)API KeyCORSVariable

GET

Philips Hue

Philips Hue smart bridge lighting control, colors, and scene automation

Internet of Things (IoT)API KeyCORS10 req/sec

GET

ThingSpeak

ThingSpeak IoT data collection, MATLAB analytics, and cloud sensor monitoring

Internet of Things (IoT)API KeyCORS15s interval

GET

Blynk

Low-code IoT software suite for mobile device control, dashboards, and firmware

Internet of Things (IoT)API KeyCORS10,000 req/month

GET

Particle

Particle cloud platform for managing cellular and Wi-Fi IoT microcontrollers

Internet of Things (IoT)API KeyCORSVariable

GET

Adafruit IO

IoT cloud platform for displaying sensor telemetry and controlling hardware devices

Internet of Things (IoT)API KeyCORS60 req/min

GET

Arduino Cloud

Arduino Cloud IoT dashboards, remote device flashing, and sensor telemetry

Internet of Things (IoT)API KeyCORSVariable

About Free Internet of Things (IoT) APIs

This directory curates 8 verified public APIs in the Internet of Things (IoT) domain. Developers can build dashboards, mobile applications, automation bots, and microservices with these ready-to-integrate endpoints without upfront billing.

Do I need an API key?

Several APIs listed here operate as Zero-Auth services where you can execute queries directly. Others provide free developer tiers with an instant key upon registration.

Does FreeAPI support CORS?

Yes, all endpoints can be called through FreeAPI Smart Edge Gateway to bypass browser CORS headers and inspect live responses.