Decoy

What it does

Decoy lets developers create mock services locally. No need for Docker or heavy Electron apps. I built it to test webhook requests coming from my own applications, testing my API wrappers and seeing how my app reacts to redirects, timeouts and failures. You can even mock full webpages to test your scrapers and AI agents against, without risking being rate limited or blocked. All in a beautiful native app. It weighs only 10MB and starts up super quickly and there is no tracking at all.

Decoy lets developers create mock services locally: Send it API requests, webhook requests, test your code against failures. All in a beautiful native app. Define method + path pairs, group them into projects. Point any service at decoy.my:8998 and go. Every incoming request shows up as it arrives. Headers, body, source IP, timestamps. JSON is auto-formatted. Pick a status code, choose a body type, set headers, add a delay if you want. Changes take effect on the next request. Headers, body, source IP, timestamp, UUID. JSON is pretty-printed. Binary data gets a hex dump. CORS headers are added automatically. Browser-based requests just work. Serve images, PDFs, or any file directly. Set the…from decoy-app.com

• 
  HTTP Mock – Intercept, debug and mock HTTP(S) with zero setup2019 · httptoolkit.tech · ▲341

  Beautiful, cross-platform & open-source tools for debugging, testing and building with HTTP(S), on Windows, Linux & Mac.

• 
  Fetchbook – Run and test your HTTP requests 100% locally2023 · github.com · ▲59

  Run and test your HTTP requests. Git friendly, 100% local. - 4lejandrito/fetchbook

• 
  We’re open-sourcing Requestly - HTTP debugging proxy for Web and Mobile2023 · github.com · ▲54

  Hey HN! We’ve open-sourced Requestly (https://github.com/requestly/requestly) - A network debugging proxy for web & mobile apps. Requestly intercepts all HTTP(s) requests & responses and provides full control to developers to modify the request/response like rewriting request URL to hit different environment or returning different response for APIs/scripts. In addition to HTTP(s) interception & modification capabilities, Requestly also offers Mock Server [0] & recording the browser sessions [1] with video, console logs, & network logs stitched together. We use…

• 
  Mockingjay – Fake servers and consumer-driven contracts2015 · github.com · ▲39

  Fake server, Consumer Driven Contracts and help with testing performance from one configuration file with zero system dependencies and no coding whatsoever - quii/mockingjay-server

• 
  Moqyy2025 · moqyy.com · ▲13

  Mock smarter. Intercept better.

• 
  DevApiService2024 · ▲6

  Mock or fake API services

• 
  /dev/null▲481

  a social network for devs

  Dev tools · 2d ago · dev-null.sh

• 
  Whiteboard (YC W26) – an open-source IDE for thoughtful software design▲423

  open-source IDE for thoughtful software design. Contribute to devdotfast/whiteboard development by creating an account on GitHub.

  Dev tools · 27d ago · github.com

• 
  Reladraw – A diagram language where you decide where to place things▲411

  Contribute to reladraw/reladraw development by creating an account on GitHub.

  Dev tools · 25d ago · github.com

• 
  OpenBot▲362

  Grok Bot alternative: free, local, open-source, multiplayer

  Dev tools · 22d ago · openbot.run

• 
  Talanoa▲341

  Hi HN, I’m a fullstack developer, and honestly, I’ve lost count of how many side projects I’ve worked on over the years. But one idea kept coming back to me: a different kind of email client. It first came to me in 2014: “What if we could handle emails more like conversations?” Every year, I’d revisit this concept in my “Build Notes.” Ten years later, no one had built exactly what I had in mind — so I finally decided to do it myself. That’s how Talanoa was born. I wanted something focused on people, not timelines. I was tired of marking messages as unread just to remember to reply later, or…

  Dev tools · 20d ago · talanoa.email

• 
  CoreSpeed▲332

  One MCP for everything your agents need: apps, memory, tools

  Dev tools · 27d ago · corespeed.io

• 
  Lightfield▲901

  AI-native CRM that builds itself and does work for you

  AI · Mar 2026 · lightfield.app

• 
  Tobira.ai▲728

  A network where AI agents find deals for their humans

  AI · Mar 2026 · tobira.ai

• 
  Claude Import Memory▲716

  Switch from ChatGPT to Claude with import memory feature

  AI · Mar 2026 · claude.com

• 
  Littlebird▲709

  Littlebird remembers everything across your meetings, messages, docs, and apps, then takes action so you can recall any detail and never lose context.

  AI · Mar 2026 · littlebird.ai

• 
  Viktor.com▲702

  Your AI Coworker that proactively executes tasks

  AI · Mar 2026 · viktor.com

• 
  Jupid▲659

  File your taxes with Claude Code

  Commerce · Mar 2026 · jupid.com