Liudas Jankauskas

Liudas Jankauskas

Rentgen.io nex-gen API testing tool
#92490911 follower23 following
2 points
🦄 9 day streak

About

I’m building Rentgen.io, a local-only next generation API testing tool that uncovers backend issues fast — no cloud, no telemetry, no vendor lock-in. Tested on real production APIs, including ChatGPT’s own backend, where Rentgen helped uncover issues that were fixed immediately. I write about quality strategy, API testing, and practical engineering principles. I care about tools that actually solve problems — not shiny dashboards or buzzwords. If you’re building APIs or care about reliability, I’m probably working on something useful for you.

Links

QA on time
rentgen.io
Instagram
LinkedIn

Badges

Tastemaker
Tastemaker
Gone streaking
Gone streaking
Gone streaking 5
Gone streaking 5

Forums

Liudas Jankauskas•

8d ago

After testing hundreds of APIs, the biggest issues are still HTTP basics

After years of testing APIs across fintech, gov, and internal platforms, I keep seeing the same pattern: Most API bugs are not complex. They re boring HTTP basics that teams quietly forget.

A few examples I see again and again:

  • Missing auth returns 403 instead of 401 so clients debug permissions instead of authentication

  • Unsupported HTTP methods return 200 so people debug payloads instead of the method

  • Non-existent endpoints return 200 so monitoring shows everything is fine while users rage

  • Invalid payloads get echoed back in error messages opening doors nobody intended

  • Private APIs allow broad CORS origins because it worked in the browser

p/meet-tingDan Bulteel•

9d ago

A reminder for founders: You are already the 1% of the 1%

Dear Product Hunt community,

If you re reading this and you ve launched something - or you're close to launching - you are already incredibly special.

Product Huntp/producthuntAaron O'Leary•

1mo ago

🔥 Best AI Automation Tools: Nominate Your Favorites for the Product Hunt Orbit Awards

We just wrapped the Orbit Awards for AI Dictation and now we re moving to the next category: AI Automation.

This one is for the tools that actually do work for you clearing chores, running workflows in the background, or quietly taking over a chunk of your week without turning into another dashboard you have to babysit.

View more