Host.io
All the domain data you need. None of the headache.
Host.io launched on October 13, 2020 with 6 votes, #1,377 of 4,018 launches that month and more than 50% of that year's launches. The site was still online in September 2026, 6 years on.
What it does
Host.io is a rich and powerful domain name data API. You can get a list of outbound links, backlinks, DNS, scraped web content and other hosting details for any given domain within milliseconds.
Get comprehensive domain name data, uncover new domains and the relationships between them. Built for Cyber Security, Business Intelligence, Competitor Analysis, Market Research and more. Get DNS details, scraped website content, outbound links, backlinks, and other hosting details for any domain. Want to see the data for yourself? Preview our API by searching for a domain using the fieldfrom host.io
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Fly Custom Hostnames API2017 · fly.io · ▲152A simple API for custom hostnames, handles DNS, SSL, etc.

Backname.io – every IP address gets its own domain2023 · backname.io · ▲46I was setting up tests involving DNS resolution recently, where something like 127.0.0.1.service.foo would have been tremendously useful. Back in the day, I'd have used xip.io - but sadly that service died. Well, every excuse is a good one when it comes to writing a DNS server! Backname.io joins nip.io and sslip.io in the wildcard DNS game.
- AAAn API to provision custom hostnames with SSL2017 · ▲90
We launched an API for custom hostnames today. A simple HTTP post with a hostname gets a temp hostname with CNAME/a record instructions, as soon as DNS is setup we issue SSL and start accepting traffic for that hostname. It's the quickest way we know of to provision custom hostnames: https://fly.io/mix/custom-hostnames/ When we started building Fly, we figured it was too late to "make SSL easy and the customers will come". Lets Encrypt changed the world, and we knew many companies rolling their own SSL support with nginx, Traefik, etc, etc. It seemed like a…

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Source: Product Hunt launch ↗
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