Make API Calls from the Terminal – curl, JSON & jq for Hackers Explained (Ch.5)

🌐 Bash for Offensive Security — Chapter 5: API Calls & JSON

Chapter 5 is where your Bash scripts stop being local tools and start talking to the internet. We learn curl — the command-line HTTP client — and jq — the JSON processor that makes API responses actually usable. Combined, they give you a UI-less web browser you can script, automate, and chain with everything we've built so far.

✅ What you'll learn:
• How HTTP works: methods, headers, status codes (200, 401, 404, 500)
• curl basics — GET, POST, PUT, DELETE from the terminal
• The -s silent flag and why you almost always need it in scripts
• Parsing JSON responses with jq — extracting single values, arrays
• The -r flag to get raw output without quotes
• Chaining curl | jq for clean, scriptable API data
• Deep dive: Authentication (Bearer tokens, API keys, Basic auth)
• Sending POST data, custom headers, cookies, proxies
• Practical patterns: paginated APIs, chaining API calls, dynamic JSON
• Exercise 8: weather.sh — live weather data fetched and parsed from wttr.in

🔧 Tools used: curl, jq, Bash, Ubuntu Terminal

📌 Part of the free "Bash Fundamentals for Offensive Security" series by
⚠️ DISCLAIMER: Educational and ethical hacking purposes only.

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