I built 4 free API endpoints nobody asked for - here is what happened

six weeks ago I had zero products, zero audience, zero revenue. standard indie hacker starting position. instead of doing the smart thing (validating demand first), I spent 3 weeks building a Python API with 4 endpoints: /seo/analyze - full SEO audit for any URL, score out of 100 /tech/detect - find what any site is built with (50+ technologies) /speed/check - page load performance breakdown /links/check - find broken links on any page then I spent another 2 weeks turning everything I learned into templates and tools - cold email templates, dev cheat sheets, budget planners, a Notion business OS, an AI prompt pack. put it all on gumroad (25 products now, search "vemtrac"). the result so far: $0 in revenue. not because the tools dont work. they work fine. the seo analyzer catches stuff that even ahrefs misses sometimes (structured data, OG tags, heading hierarchy). the tech detector finds frameworks, CDNs, analytics - basically a free builtwith alternative. the problem is nobody knows t