WhoisJSON

What it does

One API key for WHOIS lookups, DNS records, SSL validation, and domain availability. JSON or XML. 1,500+ TLDs, RDAP-ready. Start free: 1,000 requests/month, no credit card required.

Query WHOIS records, DNS entries, SSL certificates, and domain availability via a single REST API. WHOIS, DNS records, domain availability, and SSL checks — all in structured JSON or XML with 1,000 free monthly requests . const options = { method: 'GET', url: 'https://whoisjson.com/api/v1/whois', params: { domain: 'whoisjson.com' }, headers: { 'Authorization': 'TOKEN=YOUR_API_KEY' } }; fetch(options.url + '?' + new URLSearchParams(options.params), { method: options.method, headers: options.headers }) .then(response => response.json()) .then(data => console.log(data)) .catch(error => console.error(error)); { "server": "gamma", "name": "whoisjson.com", "idnName": "whoisjson.com", "status": […from whoisjson.com

• 
  Domain WHOIS APIAug 2026 · rapidapi.com · ▲3

  Free domain lookup — RDAP, no API key needed

• 
  Whois³2022 · ▲80

  Know about everyone in web3

• 
  WHOIS by Weekend Labs2023 · ▲67

  Unlock the secrets of any domain with just one WHOIS search

• 
  API Portfolio — 5 Free APIsJul 2026 · on13uka.github.io · ▲8

  5 free dev APIs: WHOIS, Company, Email, Geo, Sanctions

• ZS
  ZipWhois: Simple JSON Whois API and Domain API2014 · zipwhois.com · ▲6
• 
  DomainDetails.com - Free & Private WHOISDec 2025 · domaindetails.com · ▲26

  Free & Private domain research - right in your browser

• 
  /dev/null▲482

  a social network for devs

  Dev tools · 3d 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 · 28d 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 · 26d ago · github.com

• 
  OpenBot▲362

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

  Dev tools · 23d ago · openbot.run

• 
  Talanoa▲346

  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 · 28d 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