Every Free API You Need as a Developer (2025 Edition)

#discuss #api #webdev #beginners

I've tested 100+ free APIs over the past month. Here are the ones actually worth using, organized by what you're building.

Building a Financial App?

API	What You Get	Auth
CoinGecko	13,000+ crypto prices	None
Alpha Vantage	Stock prices + 50 indicators	Free key
SEC EDGAR	Every SEC filing ever	None
FRED	800K economic datasets	Free key
US Treasury	National debt, spending	None
Open Exchange Rates	Currency conversion	None

Python clients: coingecko | alpha-vantage | sec-edgar | fred

Building a News/Content App?

API	What You Get	Auth
NewsAPI	80K+ news sources	Free key
Hacker News	Top stories, comments	None
Dev.to	Developer articles	None
Wikipedia	Article content, search	None
arXiv	Academic papers	None
Open Library	Book data	None

Python clients: newsapi | hacker-news | wikipedia

Building a Weather/Location App?

API	What You Get	Auth
Open-Meteo	Forecasts + 80yr history	None
IP-API	IP geolocation	None
REST Countries	250+ countries data	None
USGS Earthquakes	Real-time seismic	None
Open Street Map	Geocoding	None

Python clients: open-meteo | rest-countries

Building a Social/Analytics App?

API	What You Get	Auth
GitHub	Repos, users, issues	None (60/hr)
Bluesky	Posts, feeds, profiles	JWT
Mastodon	Fediverse data	OAuth
Reddit	Posts, comments	OAuth

Building Developer Tools?

API	What You Get	Auth
JSONPlaceholder	Mock REST data	None
HTTPBin	HTTP testing	None
Lorem Picsum	Random images	None
Faker API	Fake data generator	None

The All-in-One Client

I built a single Python tool that wraps all the best free APIs:

from data_fetcher import DataFetcher
df = DataFetcher()

df.crypto("bitcoin")        # CoinGecko
df.weather(40.71, -74.01)   # Open-Meteo
df.hn_top(5)                # Hacker News
df.stock("AAPL")            # Alpha Vantage
df.news("AI")               # NewsAPI