What's Your "I Wish I Knew This Earlier" API Tip?

Every developer has that one API trick they discovered way too late. For me, it was learning that most websites have hidden JSON endpoints you can use instead of scraping HTML. For example: Add .json to any Reddit URL → structured data, no scraping needed GitHub's API gives you 5,000 requests/hour with a free token Dev.to's API lets you programmatically publish articles (that's how I post!) Most news sites have RSS feeds that are basically free APIs Here's a quick example — getting Reddit data without any API key: import requests url = " https://www.reddit.com/r/programming/top.json?limit=10&t=week " headers = { " User-Agent " : " MyApp/1.0 " } response = requests . get ( url , headers = headers ) posts = response . json ()[ " data " ][ " children " ] for post in posts : data = post [ " data " ] print ( f " { data [ ' score ' ] : > 5 } | { data [ ' title ' ][ : 60 ] } " ) No API key. No OAuth. No rate limit headaches (if you're reasonable). My favorite "hidden" APIs: Reddit .json endpo