Weather APIs ⛅️🌦️🌩️

API Name	Description	Usage Limits	Authentication	Free	Documentation
OpenWeatherMap	Weather data for any location.	60 calls per minute	API Key	Free with limited usage	OpenWeatherMap Docs
Weatherstack	Real-time weather data.	250 requests per month	API Key	Free with limited usage	Weatherstack Docs
Climacell (Tomorrow.io)	Hyper-local weather data.	500 requests per month	API Key	Free with limited usage	Climacell Docs
WeatherAPI	Real-time weather data.	1,000 calls per day	API Key	Free with limited usage	WeatherAPI Docs
MetaWeather	Weather data for any location.	No strict limits	None	Free	MetaWeather Docs
Open-Meteo	Free weather forecast API.	No strict limits	None	Free	Open-Meteo Docs
Weatherbit	Weather data and forecasts.	150 calls per day	API Key	Free with limited usage	Weatherbit Docs
Visual Crossing	Global weather data and forecasts.	1,000 calls per day	API Key	Free with limited usage	Visual Crossing Docs

Exchange Rates APIs 💱💲💹

API Name	Description	Usage Limits	Authentication	Free	Documentation
ExchangeRate-API	Exchange rates for any currency.	1,500 requests per month	API Key	Free with limited usage	ExchangeRate-API Docs
Frankfurter	Exchange rates and currency conversion.	No strict limits	None	Free	Frankfurter Docs
Open Exchange Rates	Real-time and historical exchange rates.	1,000 requests per month	API Key	Free with limited usage	Open Exchange Rates Docs
Fixer.io	Exchange rates and currency conversion.	1,000 requests per month	API Key	Free with limited usage	Fixer.io Docs
CurrencyLayer	Real-time exchange rates and currency conversion.	1,000 requests per month	API Key	Free with limited usage	CurrencyLayer Docs
XE.com	Real-time and historical exchange rates.	100,000 API units per month	API Key	Free with limited usage	XE.com Docs
1Forge	Real-time Forex and Cryptocurrency data.	500 requests per day	API Key	Free with limited usage	1Forge Docs
OANDA Exchange Rates	Exchange rates and currency data.	No strict limits (free tier)	API Key	Free with limited usage	OANDA Docs
Currency API	Real-time exchange rate data for 150+ currencies.	1,000 requests per month	API Key	Free with limited usage	Currency API Docs
ExchangeRatesAPI.io	Reliable exchange rates and currency conversion.	1,000 requests per month	API Key	Free with limited usage	ExchangeRatesAPI.io Docs
Exchangerate.host	Free foreign exchange rates and currency conversion.	5,000 requests per month	None	Free with limited usage	Exchangerate.host Docs
Free Forex API	Real-time Forex rates and currency conversion.	1,000 requests per month	API Key	Free with limited usage	Free Forex API Docs
Xignite	Financial market data including exchange rates.	100 requests per hour	API Key	Free with limited usage	Xignite Docs

Cryptocurrency APIs ₿💰🔗

API Name	Description	Usage Limits	Authentication	Free	Documentation
CoinGecko	Comprehensive cryptocurrency market data.	No strict limits	None	Free	CoinGecko Docs
CoinAPI	Real-time and historical cryptocurrency data.	100 requests per day	API Key	Free with limited usage	CoinAPI Docs
Nomics	Cryptocurrency market cap & pricing data.	1,000 requests per day	API Key	Free with limited usage	Nomics Docs
CryptoCompare	Real-time and historical cryptocurrency data.	250,000 calls per month	API Key	Free with limited usage	CryptoCompare Docs
CoinCap	Real-time cryptocurrency market data.	200 requests per minute	API Key	Free with limited usage	CoinCap Docs
CoinMarketCap	Cryptocurrency market cap and pricing data.	10,000 requests per month	API Key	Free with limited usage	CoinMarketCap Docs
CoinLore	Cryptocurrency prices and market data.	No strict limits	None	Free	CoinLore Docs
Messari	Cryptocurrency market data, news, and metrics.	50 requests per second	API Key	Free with limited usage	Messari Docs
BraveNewCoin	Real-time and historical cryptocurrency data.	1,000 requests per month	API Key	Free with limited usage	BraveNewCoin Docs
Coinpaprika	Cryptocurrency market cap, pricing, and historical data.	25,000 requests per month	API Key	Free with limited usage	Coinpaprika Docs
CoinAPI.io	Market data for cryptocurrencies.	100 requests per day	API Key	Free with limited usage	CoinAPI.io Docs
Coinlib	Real-time cryptocurrency prices and market data.	10,000 requests per month	API Key	Free with limited usage	Coinlib Docs
Bitfinex	Real-time cryptocurrency trading data.	No strict limits	None	Free	Bitfinex Docs
Binance	Real-time cryptocurrency trading data.	1,200 requests per minute	API Key	Free with limited usage	Binance Docs
Kraken	Real-time and historical cryptocurrency trading data.	No strict limits	API Key	Free	Kraken Docs

Placeholder Image APIs 📸🖼️🎨

API Name	Description	Usage Limits	Authentication	Free	Documentation
Placeholder.com	Generates customizable placeholder images.	No strict limits	None	Free	Placeholder.com Docs
Lorem Picsum	Generates random placeholder images.	No strict limits	None	Free	Lorem Picsum Docs
PlaceIMG	Provides placeholder images for any size and category.	No strict limits	None	Free	PlaceIMG Docs
FillMurray	Placeholder images of Bill Murray.	No strict limits	None	Free	FillMurray Docs
PlaceCage	Placeholder images of Nicolas Cage.	No strict limits	None	Free	PlaceCage Docs
PlaceBear	Placeholder images of bears.	No strict limits	None	Free	PlaceBear Docs
DummyImage.com	Customizable placeholder images with text.	No strict limits	None	Free	DummyImage.com Docs
PlaceKitten	Placeholder images of kittens.	No strict limits	None	Free	PlaceKitten Docs
PlaceDog	Placeholder images of dogs.	No strict limits	None	Free	PlaceDog Docs
PlaceKeanu	Placeholder images of Keanu Reeves.	No strict limits	None	Free	PlaceKeanu Docs
BaconMockup	Placeholder images of bacon.	No strict limits	None	Free	BaconMockup Docs
FakeImg.pl	Customizable placeholder images with text and colors.	No strict limits	None	Free	FakeImg.pl Docs
Placeholder Image Generator	Simple placeholder images with customizable size and text.	No strict limits	None	Free	Placeholder Image Generator Docs
Pixelholdr	Customizable placeholder images for web designers.	No strict limits	None	Free	Pixelholdr Docs
LoremFlickr	Random placeholder images from Flickr.	No strict limits	None	Free	LoremFlickr Docs

Random Generators APIs 🎲🔀🎰

API Name	Description	Usage Limits	Authentication	Free	Documentation
Random.org	Generates random numbers, sequences, and other data.	Varies, daily quotas apply	API Key	Free with limited usage	Random.org Docs
RandomUser.me	Generates random user data (name, email, address, etc.)	No strict limits	None	Free	RandomUser.me Docs
FakerAPI.it	Generates fake data for testing and development.	100 requests per month	API Key	Free with limited usage	FakerAPI.it Docs
Dicebear Avatars	Generates random avatars.	No strict limits	None	Free	Dicebear Avatars Docs
Random Data API	Generates random data such as names, addresses, and more.	No strict limits	None	Free	Random Data API Docs
Namefake.com	Generates random names and related data.	No strict limits	None	Free	Namefake.com Docs
Randommer.io	Generates random data including text, numbers, and more.	100 requests per day	API Key	Free with limited usage	Randommer.io Docs
Uinames	Generates random names based on country.	No strict limits	None	Free	Uinames Docs
TheDogAPI	Generates random pictures of dogs.	10,000 requests per month	API Key	Free with limited usage	TheDogAPI Docs
BoredAPI	Suggests random activities to overcome boredom.	No strict limits	None	Free	BoredAPI Docs
YesNo.wtf	Returns random yes or no answers.	No strict limits	None	Free	YesNo.wtf Docs
RandomWordAPI	Generates random words.	No strict limits	None	Free	RandomWordAPI Docs
PiplAPI	Generates random personal profiles.	No strict limits	None	Free	PiplAPI Docs
RandomFox	Generates random pictures of foxes.	No strict limits	None	Free	RandomFox Docs
Random Quotes API	Generates random quotes.	No strict limits	None	Free	Random Quotes API Docs

News APIs 📰📢🗞️

API Name	Description	Usage Limits	Authentication	Free	Documentation
NewsAPI	Fetch news articles from various sources.	500 requests per day	API Key	Free with limited usage	NewsAPI Docs
Currents API	Latest news from various sources.	100 requests per day	API Key	Free with limited usage	Currents API Docs
Mediastack	Real-time news data.	500 requests per month	API Key	Free with limited usage	Mediastack Docs
ContextualWeb News	Search for news articles.	10,000 requests per month	API Key	Free with limited usage	ContextualWeb Docs
GDELT	Analyzes global news events.	No strict limits	None	Free	GDELT Docs
The Guardian API	Access articles and content from The Guardian.	12,000 requests per day	API Key	Free with limited usage	The Guardian Docs
NY Times API	Access articles and content from The New York Times.	4,000 requests per day	API Key	Free with limited usage	NY Times Docs
NewsData.io	Real-time news data.	200 requests per day	API Key	Free with limited usage	NewsData.io Docs
Bing News Search API	Search for news articles.	3 requests per second	API Key	Free with limited usage	Bing News Docs
Event Registry API	Real-time news monitoring and analytics.	1,000 requests per day	API Key	Free with limited usage	Event Registry Docs
Webz.io News API	Access news articles from various sources.	100 requests per day	API Key	Free with limited usage	Webz.io Docs
Aylien News API	News and blog content with analysis features.	1,000 requests per day	API Key	Free with limited usage	Aylien Docs
NewsCatcher API	Real-time news from 50,000 sources worldwide.	500 requests per month	API Key	Free with limited usage	NewsCatcher Docs
ContextualWeb News	News articles search engine.	10,000 requests per month	API Key	Free with limited usage	ContextualWeb Docs
News River API	Access to 70+ million articles from news sources.	250 requests per day	API Key	Free with limited usage	News River Docs

Maps and Geolocation APIs 🗺️📍🌍

API Name	Description	Usage Limits	Authentication	Free	Documentation
OpenStreetMap	Free editable map of the world.	No strict limits	None	Free	OpenStreetMap Docs
Mapbox	Maps and location data for web and mobile applications.	50,000 requests per month	API Key	Free with limited usage	Mapbox Docs
OpenCage Geocoder	Forward and reverse geocoding.	2,500 requests per day	API Key	Free with limited usage	OpenCage Docs
Geoapify	Geocoding, routing, and places data.	3,000 requests per day	API Key	Free with limited usage	Geoapify Docs
Positionstack	Real-time forward and reverse geocoding.	25,000 requests per month	API Key	Free with limited usage	Positionstack Docs
HERE Geocoding and Search	Geocoding and places data.	250,000 transactions per month	API Key	Free with limited usage	HERE Docs
LocationIQ	Geocoding and reverse geocoding.	5,000 requests per day	API Key	Free with limited usage	LocationIQ Docs
MapQuest	Mapping, geocoding, and routing services.	15,000 transactions per month	API Key	Free with limited usage	MapQuest Docs
BigDataCloud	IP geolocation and reverse geocoding.	10,000 requests per month	API Key	Free with limited usage	BigDataCloud Docs
IP Geolocation API	Geolocate an IP address.	30,000 requests per month	API Key	Free with limited usage	IP Geolocation Docs
Geocode.xyz	Geocoding and reverse geocoding.	1 request per second	None	Free	Geocode.xyz Docs
Nominatim	Search OSM data by name and address.	No strict limits	None	Free	Nominatim Docs
FreeGeoIP	Geolocate an IP address.	15,000 requests per hour	None	Free	FreeGeoIP Docs
SmartyStreets	Address validation and geocoding.	250 requests per month	API Key	Free with limited usage	SmartyStreets Docs
Ambee	Environmental data APIs including weather and air quality.	1000 requests per day	API Key	Free with limited usage	Ambee Docs

Search APIs 🔍📑🕵️

API Name	Description	Usage Limits	Authentication	Free	Documentation
Google Custom Search	Custom search engine for websites and applications.	100 queries per day	API Key	Free with limited usage	Google Custom Search Docs
Bing Web Search API	Search the web for relevant information.	3 requests per second	API Key	Free with limited usage	Bing Web Search Docs
DuckDuckGo Instant Answer API	Provides instant answers to search queries.	No strict limits	None	Free	DuckDuckGo Docs
ContextualWeb Search	Web search engine for various types of content.	10,000 requests per month	API Key	Free with limited usage	ContextualWeb Docs
Serpstack	Real-time search engine results from Google.	100 searches per month	API Key	Free with limited usage	Serpstack Docs
Algolia	Search and discovery API for dynamic experiences.	10,000 operations per month	API Key	Free with limited usage	Algolia Docs
MeiliSearch	Fast and relevant search engine for various data.	No strict limits	None	Free	MeiliSearch Docs
Elasticsearch	Real-time distributed search and analytics engine.	No strict limits for open source	None	Free	Elasticsearch Docs
Searchly	Managed Elasticsearch service.	5,000 documents, 50MB storage	API Key	Free with limited usage	Searchly Docs
Giphy API	Search and retrieve GIFs.	No strict limits	API Key	Free	Giphy Docs
News API	Fetch news articles from various sources.	500 requests per day	API Key	Free with limited usage	News API Docs
Pexels API	Search for free stock photos and videos.	200 requests per hour	API Key	Free with limited usage	Pexels Docs
Unsplash API	Access high-quality photos for searches.	50 requests per hour	API Key	Free with limited usage	Unsplash Docs
GitHub Search API	Search for repositories, issues, and users on GitHub.	30 requests per minute	API Key	Free with limited usage	GitHub Docs
OMDB API	Search for movie data.	1,000 requests per day	API Key	Free with limited usage	OMDB Docs

Machine Learning APIs 🤖🧠🔮

API Name	Description	Usage Limits	Authentication	Free	Documentation
TensorFlow Serving	Serving machine learning models in production.	No strict limits	None	Free	TensorFlow Serving Docs
Hugging Face Transformers	Natural language processing and machine learning models.	No strict limits	None	Free	Hugging Face Docs
IBM Watson	Various AI and machine learning services.	1,000 API calls per month	API Key	Free with limited usage	IBM Watson Docs
OpenAI GPT-3	Natural language processing and generation.	Limited free tier (varies)	API Key	Free with limited usage	OpenAI Docs
Google Cloud AI	Machine learning and AI services from Google Cloud.	Limited free tier (varies)	API Key	Free with limited usage	Google Cloud AI Docs
Microsoft Azure AI	Various AI and machine learning services.	Limited free tier (varies)	API Key	Free with limited usage	Azure AI Docs
Clarifai	Image and video recognition and analysis.	5,000 operations per month	API Key	Free with limited usage	Clarifai Docs
Algorithmia	Deploying and managing machine learning models.	10,000 API calls per month	API Key	Free with limited usage	Algorithmia Docs
Wit.ai	Natural language for speech and text processing.	No strict limits	API Key	Free	Wit.ai Docs
Dialogflow	Natural language understanding for building chatbots.	180 API calls per minute	API Key	Free with limited usage	Dialogflow Docs
DeepAI	Various AI models for image and text processing.	No strict limits	API Key	Free	DeepAI Docs
MonkeyLearn	Text analysis with machine learning.	300 queries per month	API Key	Free with limited usage	MonkeyLearn Docs
BigML	Machine learning model creation and deployment.	16 MB dataset size limit	API Key	Free with limited usage	BigML Docs
RapidAPI Machine Learning APIs	A collection of various machine learning APIs.	Varies by API	API Key	Free with limited usage	RapidAPI Machine Learning Docs
Inferdo	Image recognition and classification.	5,000 API calls per month	API Key	Free with limited usage	Inferdo Docs

Screenshot and Picture APIs 📷🌐🖼️

API Name	Description	Usage Limits	Authentication	Free	Documentation
ScreenshotAPI.net	Capture website screenshots.	100 requests per month	API Key	Free with limited usage	ScreenshotAPI.net Docs
URL2PNG	Website screenshots in various sizes and formats.	100 requests per month	API Key	Free with limited usage	URL2PNG Docs
ApiFlash	Capture high-quality screenshots of web pages.	100 requests per month	API Key	Free with limited usage	ApiFlash Docs
Thumbnail.ws	Generate website thumbnails.	500 requests per month	API Key	Free with limited usage	Thumbnail.ws Docs
Microlink	Convert links to rich media (screenshots, data, etc.).	1,000 requests per month	API Key	Free with limited usage	Microlink Docs
ScreenshotLayer	Capture website screenshots.	100 requests per month	API Key	Free with limited usage	ScreenshotLayer Docs
Browshot	Real-time website screenshots.	100 requests per month	API Key	Free with limited usage	Browshot Docs
Page2Images	Website thumbnail generator.	100 requests per month	API Key	Free with limited usage	Page2Images Docs
URLbox	Website screenshots and PDFs.	100 requests per month	API Key	Free with limited usage	URLbox Docs
WebShrink.io	Capture website screenshots and metadata.	1,000 requests per month	API Key	Free with limited usage	WebShrink.io Docs
Capture by Techulus	Screenshot and PDF API.	200 requests per month	API Key	Free with limited usage	Techulus Docs
ShotStack	Video and image editing API.	500 render minutes per month	API Key	Free with limited usage	ShotStack Docs
Restpack Screenshot	Full page or viewport screenshots of web pages.	100 requests per month	API Key	Free with limited usage	Restpack Docs
Placid	Generate custom images from templates.	100 images per month	API Key	Free with limited usage	Placid Docs
Carbon.now.sh API	Create beautiful images of your source code.	No strict limits	None	Free	Carbon.now.sh Docs

URL Shortening APIs

API Name	Description	Usage Limits	Authentication	Free	Documentation
Bitly	Shorten, share, and track links.	50 requests per month	API Key	Free with limited usage	Bitly Docs
TinyURL	Simple URL shortening service.	No strict limits	None	Free	TinyURL Docs
Rebrandly	Custom URL shortener with link management.	5,000 requests per month	API Key	Free with limited usage	Rebrandly Docs
is.gd	Simple URL shortening service.	No strict limits	None	Free	is.gd Docs
T2M	URL shortening service with tracking.	100 requests per month	API Key	Free with limited usage	T2M Docs
Cutt.ly	Custom URL shortener with link management.	1,000 requests per month	API Key	Free with limited usage	Cutt.ly Docs
Short.io	Branded URL shortener with link management.	1,000 requests per month	API Key	Free with limited usage	Short.io Docs
Shrtco.de	Simple URL shortening service.	No strict limits	None	Free	Shrtco.de Docs
ClickMeter	URL shortening with tracking and analytics.	1,000 requests per month	API Key	Free with limited usage	ClickMeter Docs
v.gd	Simple URL shortening service.	No strict limits	None	Free	v.gd Docs
bl.ink	URL shortening and link management service.	1,000 requests per month	API Key	Free with limited usage	bl.ink Docs
Branch.io	URL shortening and deep linking.	5,000 requests per month	API Key	Free with limited usage	Branch.io Docs
Polr API	Open-source URL shortener service.	No strict limits	API Key	Free	Polr Docs
short.cm	Branded URL shortener with analytics.	1,000 requests per month	API Key	Free with limited usage	short.cm Docs
Tiny.cc	URL shortener with analytics.	500 requests per month	API Key	Free with limited usage	Tiny.cc Docs

Social Media APIs

API Name	Description	Usage Limits	Authentication	Free	Documentation
Twitter API	Access tweets, user profiles, and analytics.	500,000 tweets per month	API Key	Free with limited usage	Twitter API Docs
Facebook Graph API	Access to Facebook social graph and user data.	Rate limits apply	API Key	Free with limited usage	Facebook Graph API Docs
Instagram Basic Display API	Access basic profile information and media.	200 requests per hour	API Key	Free with limited usage	Instagram Basic Display API Docs
LinkedIn API	Access to LinkedIn user data and professional network.	Rate limits apply	API Key	Free with limited usage	LinkedIn API Docs
Reddit API	Access to Reddit posts, comments, and user data.	60 requests per minute	API Key	Free with limited usage	Reddit API Docs
YouTube Data API	Access YouTube video and channel data.	10,000 units per day	API Key	Free with limited usage	YouTube Data API Docs
TikTok API	Access TikTok video data and analytics.	Rate limits apply	API Key	Free with limited usage	TikTok API Docs
Pinterest API	Access Pinterest boards, pins, and user data.	Rate limits apply	API Key	Free with limited usage	Pinterest API Docs
Tumblr API	Access to Tumblr blog posts and user data.	1,000 requests per hour	API Key	Free with limited usage	Tumblr API Docs
Snapchat Marketing API	Access Snapchat ad campaigns and analytics.	Rate limits apply	API Key	Free with limited usage	Snapchat Marketing API Docs
VK API	Access VKontakte social network data.	Rate limits apply	API Key	Free with limited usage	VK API Docs
Slack API	Access Slack workspace data and messaging.	Rate limits apply	API Key	Free with limited usage	Slack API Docs
Discord API	Access Discord server data and messaging.	Rate limits apply	API Key	Free with limited usage	Discord API Docs
Mastodon API	Access Mastodon social network data.	Rate limits apply	API Key	Free with limited usage	Mastodon API Docs
Meetup API	Access Meetup group and event data.	Rate limits apply	API Key	Free with limited usage	Meetup API Docs

SEO APIs 🔍📈💡

API Name	Description	Usage Limits	Authentication	Free	Documentation
Google Search Console API	Access search analytics, sitemap, and URL crawl errors data.	100 requests per second	OAuth 2.0	Free	Google Search Console Docs
Ahrefs API	SEO tools for backlink, keyword, and competitive analysis.	500 rows per month	API Key	Free with limited usage	Ahrefs API Docs
SEMrush API	Online visibility and marketing analytics.	Varies, up to 10,000 requests/day	API Key	Free with limited usage	SEMrush API Docs
Moz API	SEO tools for link building, keyword research, and site audits.	120 requests per minute	API Key	Free with limited usage	Moz API Docs
SERPstat API	SEO tools for rank tracking, keyword research, and competitor analysis.	10,000 requests per day	API Key	Free with limited usage	SERPstat API Docs
Majestic API	Backlink and site explorer tools.	Varies by endpoint	API Key	Free with limited usage	Majestic API Docs
SE Ranking API	All-in-one SEO tools for rank tracking and website audit.	100 requests per minute	API Key	Free with limited usage	SE Ranking API Docs
SpyFu API	SEO tools for keyword research, competitor analysis, and domain insights.	1,000 requests per month	API Key	Free with limited usage	SpyFu API Docs
Rank Math API	SEO tools for WordPress websites including keyword tracking and site audits.	No strict limits	API Key	Free	Rank Math API Docs
BrightLocal API	Local SEO tools for rank tracking, citation management, and reviews.	Varies by endpoint	API Key	Free with limited usage	BrightLocal API Docs
SerpWow API	Real-time search engine result pages (SERP) data.	5,000 requests per month	API Key	Free with limited usage	SerpWow API Docs
DataForSEO API	Comprehensive SEO tools for keyword and rank tracking.	Varies by endpoint	API Key	Free with limited usage	DataForSEO API Docs
SEOstack API	SERP data extraction and rank tracking tools.	1,000 requests per month	API Key	Free with limited usage	SEOstack API Docs
Botify API	Website crawling and log analysis tools for SEO.	10,000 requests per month	API Key	Free with limited usage	Botify API Docs
Screaming Frog API	Website crawler for SEO audits.	Varies by usage	API Key	Free with limited usage	Screaming Frog API Docs

Shopping APIs 🛍️🛒📦

API Name	Description	Usage Limits	Authentication	Free	Documentation
Amazon Product Advertising API	Access product details, reviews, and prices from Amazon.	Varies by account	API Key	Free with limited usage	Amazon Product Advertising API Docs
eBay Shopping API	Retrieve eBay listings, item details, and seller information.	5,000 calls per day	OAuth 2.0	Free	eBay Shopping API Docs
Walmart API	Access Walmart product data, pricing, and inventory.	Varies by endpoint	API Key	Free with limited usage	Walmart API Docs
Etsy API	Access Etsy marketplace data including listings, shops, and reviews.	5,000 calls per day	OAuth 2.0	Free with limited usage	Etsy API Docs
Shopify Admin API	Manage Shopify store data including products, orders, and customers.	40 requests per minute	API Key	Free with limited usage	Shopify Admin API Docs
BigCommerce API	Manage BigCommerce store data including products, orders, and customers.	20 requests per second	API Key	Free with limited usage	BigCommerce API Docs
Best Buy API	Access Best Buy product data, pricing, and availability.	5,000 requests per day	API Key	Free with limited usage	Best Buy API Docs
AliExpress API	Access AliExpress product details, pricing, and reviews.	Varies by account	API Key	Free with limited usage	AliExpress API Docs
WooCommerce REST API	Manage WooCommerce store data including products, orders, and customers.	1,000 requests per day	API Key	Free with limited usage	WooCommerce REST API Docs
Rakuten Marketplace API	Access Rakuten product data, pricing, and availability.	Varies by account	API Key	Free with limited usage	Rakuten Marketplace API Docs
Mercari API	Access Mercari marketplace data including listings and user profiles.	Varies by account	API Key	Free with limited usage	Mercari API Docs
Zalando API	Access Zalando product data and search functionality.	Varies by account	API Key	Free with limited usage	Zalando API Docs
Flipkart Affiliate API	Access Flipkart product data, prices, and deals.	1,000 requests per day	API Key	Free with limited usage	Flipkart Affiliate API Docs
Target API	Access Target product data, pricing, and availability.	Varies by account	API Key	Free with limited usage	Target API Docs
OpenCart API	Manage OpenCart store data including products, orders, and customers.	Varies by account	API Key	Free with limited usage	OpenCart API Docs

Developer APIs 💻🔧🛠️

API Name	Description	Usage Limits	Authentication	Free	Documentation
GitHub API	Access repositories, issues, and pull requests on GitHub.	5,000 requests per hour	OAuth 2.0 / API Key	Free	GitHub API Docs
GitLab API	Access repositories, issues, and merge requests on GitLab.	10 requests per second	OAuth 2.0 / API Key	Free	GitLab API Docs
Bitbucket API	Access repositories, issues, and pull requests on Bitbucket.	1,000 requests per hour	OAuth 2.0 / API Key	Free	Bitbucket API Docs
Stack Exchange API	Access questions, answers, and user data on Stack Overflow.	300 requests per day	API Key	Free	Stack Exchange API Docs
Atlassian JIRA API	Manage JIRA projects, issues, and workflows.	1,000 requests per day	OAuth 2.0 / API Key	Free with limited usage	JIRA API Docs
Trello API	Manage Trello boards, lists, and cards.	300 requests per 10 seconds	OAuth 1.0 / API Key	Free	Trello API Docs
Asana API	Manage tasks, projects, and workspaces in Asana.	150 requests per minute	OAuth 2.0 / API Key	Free	Asana API Docs
Slack API	Integrate with Slack to send messages and manage channels.	Varies by method	OAuth 2.0 / API Key	Free with limited usage	Slack API Docs
Twilio API	Send SMS, make calls, and manage communication workflows.	Varies by account	API Key	Free with limited usage	Twilio API Docs
SendGrid API	Send emails and manage email marketing campaigns.	40,000 requests per day	API Key	Free with limited usage	SendGrid API Docs
Mailgun API	Send, receive, and track emails using Mailgun.	5,000 emails per month	API Key	Free with limited usage	Mailgun API Docs
Firebase API	Access Firebase services including Firestore, Auth, and Realtime Database.	Varies by service	API Key / OAuth 2.0	Free with limited usage	Firebase API Docs
Heroku API	Manage Heroku apps and resources programmatically.	Varies by endpoint	OAuth 2.0 / API Key	Free	Heroku API Docs
Azure DevOps API	Access Azure DevOps services including Pipelines, Repos, and Boards.	60 requests per minute	OAuth 2.0 / API Key	Free	Azure DevOps API Docs
Jenkins API	Manage Jenkins jobs, builds, and nodes.	No strict limits	API Key	Free	Jenkins API Docs
Netlify API	Manage Netlify sites, builds, and deployments.	2,000 requests per hour	OAuth 2.0 / API Key	Free	Netlify API Docs
DigitalOcean API	Manage DigitalOcean droplets, domains, and resources.	5,000 requests per hour	OAuth 2.0 / API Key	Free	DigitalOcean API Docs
AWS SDK	Access AWS services including EC2, S3, and RDS programmatically.	Varies by service	API Key	Free with limited usage	AWS SDK Docs
Google Cloud API	Access Google Cloud services including Compute Engine, Cloud Storage, and BigQuery.	Varies by service	API Key / OAuth 2.0	Free with limited usage	Google Cloud API Docs
Microsoft Graph API	Access Microsoft 365 services including Outlook, OneDrive, and Teams.	10,000 requests per 10 minutes	OAuth 2.0	Free	Microsoft Graph API Docs

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150+ FREE APIs Every Developer Needs to Know

Table of Contents

Weather APIs ⛅️🌦️🌩️

Exchange Rates APIs 💱💲💹

Cryptocurrency APIs ₿💰🔗

Placeholder Image APIs 📸🖼️🎨

Random Generators APIs 🎲🔀🎰

News APIs 📰📢🗞️

Maps and Geolocation APIs 🗺️📍🌍

Search APIs 🔍📑🕵️

Machine Learning APIs 🤖🧠🔮

Screenshot and Picture APIs 📷🌐🖼️

URL Shortening APIs

Social Media APIs

SEO APIs 🔍📈💡

Shopping APIs 🛍️🛒📦

Developer APIs 💻🔧🛠️