YAML Studio

What it does

Build OpenAPI YAML specs visually with drag-and-drop ease. YamlStudio helps devs and API teams skip manual errors, save time, and generate clean, spec-compliant YAML for Function Calling, Swagger, and LLM apps—no coding needed.

• 
  Swagger Editor2023 · ▲207

  Beautiful API references from Swagger, OpenAPI spec

• OD
  OpenAPI DevTools – Chrome extension that generates an API spec2023 · github.com · ▲811

  Effortlessly discover API behaviour with a Chrome extension that automatically generates OpenAPI specifications in real time for any app or website.

• 
  create-api.dev by Kong2025 · ▲150

  Generate and share OpenAPI specs with AI

• 
  Conektto API-First Design Studio2023 · ▲157

  API design studio for product managers

• AF
  A faster way to prototype your APIs using OpenAPI 3 and Swagger UI2020 · github.com · ▲77
• AJ
  Agents.json – OpenAPI Specification for LLMs2025 · github.com · ▲212

  Hey HN, we’re building an open specification that lets agents discover and invoke APIs with natural language, built on the OpenAPI standard. agents.json clearly defines the contract between LLMs and API as a standard that's open, observable, and replicable. Here’s a walkthrough of how it works: https://youtu.be/kby2Wdt2Dtk?si=59xGCDy48Zzwr7ND. There’s 2 parts to this: 1. An agents.json file describes how to link API calls together into outcome-based tools for LLMs. This file sits alongside an OpenAPI file. 2. The agents.json SDK loads agents.json files as tools for an LLM that…

• 
  Dograh▲592

  The open source VAPI alternative

  Dev tools · 26d ago · dograh.com

• 
  Meridian▲530

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

  Dev tools · 21d ago · meridiona.com

• 
  x1▲516

  Lovable for iPhone apps go from idea to App Store

  Dev tools · 12d ago · x1.new

• 
  Open-Source eInk Bike Computer▲414

  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 · 3d ago · opentrailpaper.com

• 
  Nuphos▲380

  The AI-Native DevOps Workspace.

  Dev tools · 25d ago · nuphos.ai

• 
  Lettertrace▲375

  Track your AI visibility for free (using your own API keys!)

  Dev tools · 26d ago · lettertrace.com

• IM
  I'm an airline pilot – I built interactive graphs/globes of my flights▲1,539

  Hey HN! Pilots everywhere are required to keep a logbook of all their flying hours, aircraft, airports, and so on. Since I track everything digitally (some people still just use paper logbooks!), I put together some data visualizations and a few 3D globes to show my flying history. This globe is probably my favourite so far: https://jameshard.ing/pilot/globes/all If you’ve got ideas for other graphs or ways to show this kind of data, I’d love to hear them!

  Life & fun · 2025 · jameshard.ing

• 
  Chronicle: Cursor for Slides▲1,213

  Stunning presentations with AI. No design skills required.

  AI · 2025 · chroniclehq.com

• 
  Bubble for native mobile apps (beta)▲1,029

  Build native mobile apps for iOS and Android without code.

  Dev tools · 2025 · bble.io

• 
  Twenty▲991

  The #1 open-source CRM

  Dev tools · 2025 · twenty.com

• 
  Pally - AI Relationship Management▲949

  All your connections, across all your socials.

  AI · 2025 · pally.com

• WC
  Workout.cool – Open-source fitness coaching platform▲827

  I was the main contributor to workout.lol, an open-source fitness app to easily build a workout routine. The project had traction (1.4k GitHub stars, 95 forks, ~20K visits/month), but was eventually sold due to video licensing hurdles. The new owner stopped maintaining it, and the repo went abandoned. Over the next 9 months, I sent 15 emails to try to save it : no replies. Feature requests & issues were ignored. The community was left with a "broken" tool let's say. I couldn't just let it die So I built the new version from scratch with the same open-source spirit, but a better…

  Dev tools · 2025 · github.com