API Error Helper

What it does

Paste any API error code like 401, 404, 500, and instantly get real explanations, causes, curl commands, and troubleshooting tips—free dev tool for debugging APIs.

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  Better Error Pages2015 · ▲544

  Build free 404, 503 and maintenance pages in 60 seconds

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  500 error2016 · ▲129

  Your server can crash anytime. Don't miss important leads!

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  HTTP Status Dogs2021 · ▲87

  Hypertext Transfer Protocol Response status codes, and dogs

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  http.garden2023 · ▲74

  Gardening for every HyperText Transfer Protocol status code

• IR
  Intercept.rest – Faster API debugging2018 · ▲89

  Sharing an internal tool that accelerated my development work 10-fold, especially with API debugging. Thought fellow developers here might find it useful. As a developer, I often have trouble reproducing errors at the client end. https://intercept.rest lets me debug and monitor API requests and responses. It is similar to the Network tab in Chrome Developer Tools but works for any API: mobile apps, webhooks, frontend etc. After I shared it with a close circle of friends, they found it incredibly useful and even found new use cases, I never imagined. Been a long time lurker here and…

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  HTTP Status Code Quiz Jun 2026 · jsondevtools.org · ▲13

  A 10-question quiz to learn HTTP status codes the fast way

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  Meridian▲530

  Don't let your work go unnoticed. Get promoted!

  Dev tools · 25d ago · meridiona.com

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  x1▲516

  Lovable for iPhone apps go from idea to App Store

  Dev tools · 16d ago · x1.new

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  Open-Source eInk Bike Computer▲421

  OpenTrailPaper is open-source bike computer firmware for the LilyGO T5S3 4.7" E-Paper PRO. It supports offline maps, GPX routes, FIT recording and Bluetooth sensors.

  Dev tools · 7d ago · opentrailpaper.com

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  Nuphos▲380

  The AI-Native DevOps Workspace.

  Dev tools · 29d ago · nuphos.ai

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  Toplify▲365

  Track your App Store ranking worldwide

  Dev tools · 20d ago · toplify.app

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  Vendo ▲362

  Let your users build their own features inside your product

  Dev tools · 25d ago · vendo.run

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  Clueso▲1,300

  Create stunning product videos in minutes with AI

  AI · 2025 · clueso.io

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  Trickle - Magic Canvas ▲1,064

  The 1st Agentic Canvas for building apps visually with AI

  AI · 2025 · trickle.so

• TB
  Tinder but it's only pictures of my wife and I can only swipe right▲1,030

  Life & fun · 2025 · trytender.app

• TY
  Ten years of running every day, visualized▲958

  Today marks ten years, 3653 consecutive days, of running at least one mile every day under the USRSA rules [1]. To celebrate, I built an interactive dashboard that turns a decade of GPX files into charts you can explore. Running has truly changed my life: I've made lifelong friends, explored beautiful places, and more importantly invested into my own health and fitness, which I'm starting to see the positive benefits as I get older. The stack is pretty simple: a NextJS app, with a Postgres database to keep all my running data, and all the stats are pre-computed and cached in Redis, so I…

  Dev tools · 2025 · nodaysoff.run

• DA
  Draw a fish and watch it swim with the others▲935

  Made this website as an exercise in vibe-coding and GCP. It was posted about a few times around the internet, on sites like Morning Brew (https://www.morningbrew.com/issues/business-buzzkill), MetaFilter (https://www.metafilter.com/209703/Draw-A-Fish), boingboing.net, etc. I think it's cute! I built a basic CNN trained against penises and swastikas, and then anything that doesn't hit the 63% confidence score gets sent to a mod queue, a vibe-coded fish-tinder…

  Dev tools · 2025 · drawafish.com

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  AppStruct▲864

  No-code app builder

  Dev tools · 2025 · appstruct.ai