Why most cURL converters fail on real-world requests — so I built my own

I wasted more time than I'd like to admit translating cURL commands into JavaScript and Python. Not because it's hard — it's not. But because every converter I tried worked fine on toy examples and quietly broke on anything real. Here's what actually happened when I tested the most popular ones: Here's what actually happened when I tested the most popular ones: Tool Auth ( -u ) JSON body → json= Axios output Python output Tool A ❌ silently dropped ❌ passed as string ❌ no ❌ no Tool B ⚠️ hardcoded comment ❌ passed as string ❌ no ❌ no Tool C ❌ silently dropped ✅ ❌ no ❌ no apidevtools ✅ auth= tuple ✅ detects Content-Type ✅ ✅ So I built my own . The real-world curl command that breaks most converters This is what actual API integration looks like — not curl https://api.example.com: bashcurl -X POST " https://api.example.com/v1/users " \ -H "Authorization: Bearer eyJhbGci..." \ -H "Content-Type: application/json" \ -d '{"name": "John", "role": "admin"}' \ -u myuser:mypassword Two things that