Free & Open Source WHOIS Lookup Service
No-CORS, no auth API that's publicly available or easily self-hostable
🌐 who-dat.as93.net

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Contents

• API Usage
  • Base URL
  • Endpoints
    • Single Domain
    • Bulk Domains
• Deployment
  • Option 1: Vercel
  • Option 2: Docker
  • Option 3: Binary
  • Option 4: Build from Source
• Development
• Contributing
• Web Interface
• Mirror
• Credits
• More Like This
• License

API Usage

TL;DR Get the WHOIS records for a site: curl https://who-dat.as93.net/example.com

For detailed request + response schemas, and to try the API out, you can reference the spec

Base URL

The base URL for the public API is who-dat.as93.net

If you're self-hosting (recommended) then replace this with your own base URL.

Endpoints

Single Domain Lookup /[domain]

• URL: /[domain]
• Method: GET
• URL Params: None
• Success Response:
  • Code: 200
  • Content: WHOIS data for the specified domain in JSON format.
• Error Response:
  • Code: 400 BAD REQUEST
  • Content: { "error": "Domain not specified" }
  • Code: 404 NOT FOUND
  • Content: { "error": "Domain not found" }
• Sample Call:

Command Line

curl https://who-dat.as93.net/example.com

JavaScript

fetch('https://who-dat.as93.net/example.com')
  .then(response => response.json())
  .then(data => console.log(data))
  .catch(error => console.error('Error:', error));

Python

import requests

response = requests.get('https://who-dat.as93.net/example.com')
if response.status_code == 200:
    print(response.json())
else:
    print("Error:", response.status_code)

Multiple Domain Lookup /multi

• URL: /multi
• Method: GET
• Query Params:
  • domains: A comma-separated list of domains.
• Success Response:
  • Code: 200
  • Content: Array of WHOIS data for the specified domains in JSON format.
• Error Response:
  • Code: 400 BAD REQUEST
  • Content: { "error": "No domains specified" }
  • Code: 500 INTERNAL SERVER ERROR
  • Content: { "error": "[error message]" }
• Sample Call:

curl "https://who-dat.as93.net/multi?domains=example.com,example.net"

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Deployment

Option 1: Vercel

This is the quickest and easiest way to get up-and-running. Simply fork the repository, then login to Vercel (using GitHub), and after importing your fork, it will be deployed! There's no additional config or keys needed, and it should work just fine on the free plan.

Alternatively, just hit the button below for 1-click deploy 👇

Option 2: Docker

The light-weight Docker image is published to DockerHub (hub.docker.com/r/lissy93/who-dat), as well as GHCR (here).

Providing you've got Docker installed, you can get everything by running:

docker run -p 8080:8080 --dns 8.8.8.8 --dns 8.8.4.4 lissy93/who-dat

Option 3: Binary

Head to the Releases Tab, download and extract the pre-built executable for your system, then run it.

Example

If you're using the command line, you can do something like this
Don't forget to update (v1.0) with the version number you want, and (linux-amd64) with your system's architecture.

# Download the binary for your system (from releases tab)
wget https://github.com/Lissy93/who-dat/releases/download/v0.9/who-dat-v0.9-linux-amd64.tar.gz -O ./who-dat.tar.gz

# Extract the compressed file
tar -xzvf who-dat.tar.gz

# Make it executable
chmod +x who-dat

# Run Who-Dat!
./who-dat

(Or, if you're a Microsoft fanboy, you can just double-click the who-dat.exe after extracting in Windows Explorer)

Option 4: Build from Source

Follow the setup instructions in the Development section.
Then run go build -a -installsuffix cgo -o who-dat . to generate the binary for your system.
You'll then be able to execute the newly built ./who-dat file directly to start the application.

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Development

Prerequisites: You'll need Go and Node installed. You will likley also want Git and/or Docker.

git clone git@github.com:Lissy93/who-dat.git
cd who-dat
go get
npm install
npm run build

Then run either npx vercel dev, or go run main.go

Alternativley, build the Docker container with docker build -t who-dat .

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Web Interface

There's a very simple frontend included in the app. This is built with Alpine.js, so is super light-weight, and only adds about 100kb to the total executable. The web interface is used to view WHOIS records for a given domain, and also hosts the API documentation.

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Contributing

Contributions of any kind are welcome (and would be much appreciated!). Be sure to follow our Code of Conduct.
If you're new to open source, I've put together some guides in Git-In, but feel free to reach out if you need any support.

Not a coder? You can still help, by raising bugs you find, updating docs, or consider sponsoring me on GitHub

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Mirror

We've got a (non-Microsoft) mirror of this repository hosted on CodeBerg, at codeberg.org/alicia/who-dat

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Credits

Inspiration

This project was inspired by someshkar/whois-api by Somesh Kar.

Tech Credits

• The frontend is built with Alpine.js¹, Vite², TS³ and SCSS⁴ (plus the usual web tech stack).
• The backend is written in Go⁵, and was made possible thanks to json-iterator/go and likexian/whois-parser
• Demo deployed to Vercel⁶ (but also available on DockerHub⁷), and source of course on GitHub⁸ and CodeBerg⁹.

Contributors

Alicia Bot

Alicia Sykes

Sammy LS

Phill Holland

Sponsors

Vincent Koc	Anand Chowdhary	Shrippen	Zach Biles	Ulises Gascón	Digital Archeology
InDieTasten	Araguaci	Brian McGonagill	Vlad	HeliXZz	Patrick Van Der Veken
Göksel Yeşiller	Shiverme Timbers	Forward Email - Open-source & Privacy-focused Email Service (2023)	GT	Bastii717	Umbrel
Frankdez93	Terminal Trove	St617	Nrvo	Hudsonrock-partnerships

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More Like This

You might be interested in Web-Check, an all-in-one tool for fetching info on a given domain name.

If you like projects like these, consider following me on GitGub 😊
I'm often putting out new (free & open source) utilities, relating to security, privacy, OSINT, Linux and self-hosting.

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License

Lissy93/Who-Dat is licensed under MIT © Alicia Sykes 2024.
^{For information, see TLDR Legal > MIT}

Expand License

The MIT License (MIT)
Copyright (c) Alicia Sykes <alicia@omg.com> 

Permission is hereby granted, free of charge, to any person obtaining a copy 
of this software and associated documentation files (the "Software"), to deal 
in the Software without restriction, including without limitation the rights 
to use, copy, modify, merge, publish, distribute, sub-license, and/or sell 
copies of the Software, and to permit persons to whom the Software is furnished 
to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included install 
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANT ABILITY, FITNESS FOR A
PARTICULAR PURPOSE AND NON INFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

© Alicia Sykes 2024
Licensed under MIT

^{Thanks for visiting :)}

References

_{➧ See Credits}

Footnotes

1. Alpine.js - A rugged, minimal framework for composing JavaScript behavior in your markup. ↩

2. Vite - A build tool that aims to provide a faster and leaner development experience for modern web projects. ↩

3. TypeScript - A typed superset of JavaScript that compiles to plain JavaScript. ↩

4. SCSS - A preprocessor scripting language that is interpreted or compiled into Cascading Style Sheets (CSS). ↩

5. Go Lang - An open source programming language that makes it easy to build simple, reliable, and efficient software. ↩

6. Vercel - Static hosting and shit ↩

7. DockerHub - Container registry hosting and shit ↩

8. GitHub - A platform for version control and collaboration. It lets you and others work together on projects from anywhere. ↩

9. Codeberg - A free and open-source forge for collaborative software development. ↩