I Built a Free SEO Tool With One API and a Lot of Vibes: Here's Everything I Learned

Description and use

DR Checker consolidates five essential domain metrics into a single free tool, eliminating the need for multiple tabs and logins, saving time and money.

Problem

Simple SEO domain checks require multiple tools, tabs, and logins, making a quick decision tedious.

Outcome

DR Checker reduced the domain vetting workflow from five separate steps to one click, saving users $200–$300/month and cutting time spent on manual checks.

Workflow

• Enter a domain name
• Fetch Domain Rating via Ahrefs API
• Fetch Domain Authority via Open PageRank
• Lookup Domain Age via RDAP
• Retrieve Referring Domains count
• Show SERP preview
• Support bulk domain checks

Evidence

Five tools. Five tabs. Five logins. For one decision: is this domain worth my time?

Source

DR Checker bundles four of those metrics into one free lookup.

Source