Insomnia Designer – Open-source collaborative editor for API design

In plain words

Insomnia Designer is an open-source collaborative editor for designing and building APIs. It allows developers to work together on API specifications in real time. The tool is built for teams who need to coordinate API development workflows and streamline the design process before implementation. As an open-source solution, it can be self-hosted and customized to fit specific project requirements.

written from the facts on this page · September 2026

• 
  Insomnia REST Client now open-source2017 · insomnia.rest · ▲218

  Leading Open Source API Development Platform for HTTP, REST, GraphQL, gRPC, SOAP, and WebSockets

• 
  Insomnia Designer2020 · insomnia.rest · ▲16

  Collaborative API Design Platform / Editor

• 
  Insomnia REST API Client2015 · insomnia.rest · ▲112

  Build, manage, and run templated REST API requests

• 
  Restfox – Open source lightweight alternative to Postman2022 · restfox.dev · ▲758

  Last time I posted this it didn't garner much interest. There have been lots of improvements and fixes since the last release. Quick list of features: - Workspaces - Tabs - Nested Folders - Lots of context menus - Response history - Plugins - Runs fully in the browser and runs offline if necessary - Chrome and Firefox extension to bypass CORS restrictions - Desktop builds for all platforms - GraphQL support - Import collections exported from Postman and Insomnia - Simple user friendly interface I built this because I love Insomnia but wanted a portable version that I could run in the…

• 
  Anything APIMar 2026 · anything.notte.cc · ▲656

  Hey HN! We built Notte, a browser infrastructure and agents platform. Many of our users automate UI workflows or extract data from sites that don’t have APIs. In practice, we noticed that once an agent understands how a site works, parts of the task can often run without a browser by interacting with the same network requests the site uses. So we built Anything API: describe a browser task, and our agent explores the site, builds a function, tests it against your description, and deploys a callable REST endpoint. No infra to manage. How the build works: - Describe the task (best results come…

• 
  Yaak – An open source, Git-friendly desktop API client2025 · yaak.app · ▲153

  Hi HN! I'm Greg and I've been working on Yaak for just over a year. I usually describe it as a Postman alternative since most developers are familiar with that, but it's targeted more toward users that just want an API client (no mocking, testing, spec design, etc). Having also created Insomnia for a similar purpose, I never thought I'd build another API client again. But, after selling Insomnia in 2019 and watching it expand into the broader feature set of Postman, I was left wanting a simpler tool again. Yaak was my answer to that. It's hard to describe how it's better than the 100 other…

• 
  /dev/null▲472

  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▲340

  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

• 
  A basketball hoop to maximize shots that go in [video]▲971

  https://github.com/OlexG/finclaw ^ repo if anyone wants to contribute. I realized that sometimes I'm pretty good at making random guesses about the future. (I.E, I think OpenAI will beat Anthropic in the short term, etc...) However, I'm bad at converting these guesses into actual market plays I can profit from. As such, I wanted to make a tool that connects to the right APIs and launches a swarm of agent experts to generate related plays based on your prediction. The very first super shitty V0 MPV just has Polymarket/Kalshi bets, but I will be adding a more complex…

  AI · 2020 · youtube.com

• 
  CleanShot X▲951

  Mac-native app for screenshots, recordings and collaboration

  Dev tools · 2020 · cleanshot.com

• 
  How to say no.▲885

  Templates to help you say no in any situation

  Work · 2020 · starterstory.com

• 
  Avodocs 2.0▲878

  Free legal documents for startups

  Work · 2020

• 
  FalsiScan – Make it look like a PDF has been hand signed and scanned▲770

  For bureaucratic reasons, a colleague of mine had to print, sign, scan and send by email a high number of pages. To save trees, ink, time, and to...

  Life & fun · 2020 · gitlab.com

• 
  Good Books▲716

  Largest curated collection of 6,500+ book recommendations.

  Work · 2020 · goodbooks.io