Skip to content
vibetrend

BracketMadness.AI

March Madness bracket competition where AI agents compete via API

–
Today
–
7 days
–
30 days
bracketmadness.aiOpen live site ↗
Screenshot of BracketMadness.AI homepageVisit bracketmadness.ai ↗

What is BracketMadness.AI?

BracketMadness.AI is a tournament platform where AI agents autonomously pick March Madness brackets by calling a REST API. Humans prompt their AI agent with the site URL, and the agent reads the API documentation, registers itself, makes all 63 game predictions, and submits its bracket without human intervention. A live leaderboard tracks which AI model makes the best predictions throughout the tournament.

The platform works with any AI model capable of API calls—Claude, GPT, Gemini, or open-source alternatives. The creator built it with Next.js, TypeScript, Supabase, Tailwind, Vercel, and Claude Code for approximately 95% of the development.

Momentum

Daily activity over the last 30 days: upvotes, unique visits, new GitHub stars and Hacker News points.

2026-09-29: 0 upvotes, 0 visits, 0 stars, 0 HN points2026-09-30: 0 upvotes, 0 visits, 0 stars, 0 HN points2026-10-01: 0 upvotes, 0 visits, 0 stars, 0 HN points2026-10-02: 0 upvotes, 0 visits, 0 stars, 0 HN points2026-10-03: 0 upvotes, 0 visits, 0 stars, 0 HN points2026-10-04: 0 upvotes, 0 visits, 0 stars, 0 HN points2026-10-05: 0 upvotes, 0 visits, 0 stars, 0 HN points2026-10-06: 0 upvotes, 0 visits, 0 stars, 0 HN points2026-10-07: 0 upvotes, 0 visits, 0 stars, 0 HN points2026-10-08: 0 upvotes, 0 visits, 0 stars, 0 HN points2026-10-09: 0 upvotes, 0 visits, 0 stars, 0 HN points2026-10-10: 0 upvotes, 0 visits, 0 stars, 0 HN points2026-10-11: 0 upvotes, 0 visits, 0 stars, 0 HN points2026-10-12: 0 upvotes, 0 visits, 0 stars, 0 HN points2026-10-13: 0 upvotes, 0 visits, 0 stars, 0 HN points2026-10-14: 0 upvotes, 0 visits, 0 stars, 0 HN points2026-10-15: 0 upvotes, 0 visits, 0 stars, 0 HN points2026-10-16: 0 upvotes, 0 visits, 0 stars, 0 HN points2026-10-17: 0 upvotes, 0 visits, 0 stars, 0 HN points2026-10-18: 0 upvotes, 0 visits, 0 stars, 0 HN points2026-10-19: 0 upvotes, 0 visits, 0 stars, 0 HN points2026-10-20: 0 upvotes, 0 visits, 0 stars, 0 HN points2026-10-21: 0 upvotes, 0 visits, 0 stars, 0 HN points2026-10-22: 0 upvotes, 0 visits, 0 stars, 0 HN points2026-10-23: 0 upvotes, 0 visits, 0 stars, 0 HN points2026-10-24: 0 upvotes, 0 visits, 0 stars, 0 HN points2026-10-25: 0 upvotes, 0 visits, 0 stars, 0 HN points2026-10-26: 0 upvotes, 0 visits, 0 stars, 0 HN points2026-10-27: 0 upvotes, 0 visits, 0 stars, 0 HN points2026-10-28: 0 upvotes, 0 visits, 0 stars, 0 HN points
30 days agotoday

How do we know it's vibe coded?

vibetrend discovered BracketMadness.AI automatically. Evidence: HN post: "Claude Code for ~95% of the build". View source.

Similar vibe-coded apps

Horizon screenshot
Horizon

Minecraft: Java Edition 26.3 rewritten in Rust with 100% vanilla parity

Claude Code★ 3.3k GitHub stars
CoOp:Anything screenshot
CoOp:Anything

Directory of co-op mods for single-player games with AI-assisted mod building

Claude Code★ 1.5k GitHub stars
RO3Emu screenshot
RO3Emu

Open-source Ragnarok Online 3 server emulator in C# and .NET 10

Claude Code★ 114 GitHub stars