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Show HN: Open-source certificate from GitHub activity
I built this as a small side project to learn and experiment, and I ended up with this!

I used a subdomain from my personal portfolio, and everything else runs on free tiers.

The project uses Nuxt, SVG, Cloudflare Workers, D1 (SQL), KV, Terraform, and some agentic coding with OpenAI Codex and Claude Code.

What started as a joke among friends turned into a fun excuse to build something end to end, from zero to production, and to explore a few things I’d never touched before.

I’d really appreciate any feedback or suggestions.

Fun idea! Seems like a pretty complex tech stack.

My only recommendation is to add better input filtering on the front end. For example, I initially copy and pasted the whole URL and it gave a 400 error. e.g. https://github.com/QCgeneral29/

Then I realized it was only the username, so I deleted the url part, but forgot to remove the / at the end e.g.

QCgeneral29/

Another 400 error. Finally, I entered QCgeneral29 and it worked.

  • holg
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  • 3 days ago
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Nice idea, how about even more badges? Might be some challenge for the clean looking Certificate...
yea, it really is a challenge! currently, I have a sorting working to fetch the most relevant badges. I only show the top 3 to keep the certificate clean
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  • 3 days ago
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Very cool! Any plans to add more badges specific to big open-source projects like React, Linux, or Git?
Great idea. totally doable for sure
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  • 5 hours ago
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Nice, how much is costing to run?
Feature request: GitLab support.