
Playground — Fabraix
Test your prompt injection skills against AI agents in an interactive competitive challenge.
ibrahim_abdu777 · HN
We are giving away $100K > over the next 12 months to hack AI agents
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73 projects

Test your prompt injection skills against AI agents in an interactive competitive challenge.
ibrahim_abdu777 · HN
We are giving away $100K > over the next 12 months to hack AI agents

Dead-simple runway, burn rate, and investor updates for founders. No fluff. Only moving forward.
@fwdatrium · X
FWD Atrium For the founder who raised their first round and now spends Sunday nights writing investor updates instead of building. We fix it.

RankArena is the live pay-to-rank arena for internet products. List your product free, outbid rivals in one click, and defend your spot on the board.
@Massi_cico · X
🚀 Meet RankArena The internet’s live arena for products, startups & projects. 🏆 Climb the rankings ⚔️ Battle your competitors 💰 Bid for attention 🔥 Track momentum 📈 Get discovered Fight for the #1 spot. 👉 Who’s taking #1? 👀

One spotlight. Anyone can take it. Climb the leaderboard and get looked at.
@zroutisnomore · X

A high-stakes live advertising death match. Pay to rank #1 and add seconds to the countdown clock. If the clock hits 00:00:00, the site dies forever and the #1 king is immortalized
@payordie_lol · X
keep that clock ticking! ❤️

@pfernan95dev An AI web app for solo coaches and coaching teams to generate tailored programs with a single prompt using client data https://t.co/u9PKy4jcjF
@3aziz2000 · X
An AI web app for solo coaches and coaching teams to generate tailored programs with a single prompt using client data

Create functional apps by describing them in plain language, no coding required.

Buy your way up a public leaderboard of apps and SaaS. One dollar minimum, rank recalculates the moment payment clears.
@heysidhant · X

A public leaderboard where products bid real money to hold a position. The highest total holds #1, and anyone can take it by paying more. No algorithm, no gatekeeper.
@MarketingY79465 · X

Willie is the AI project manager inside Groundskeeper — she reads your documents, drafts the plan, surfaces what changed, and prepares client updates.
@groundskeeperpm · X

Generate a circular avatar from any photo with automatic background removal in the browser.
@appsbywill · X
i've been playing around with this profile picture maker, I really want to fine tune the background removal and add more styling templates. Let me know if you find more bugs!

Sync data across devices in real-time with automatic security inspection via an API.
@mygridsyncdev · X
Just launched GridSync ⚡️ Sub-150ms zero-trust payload inspection & real-time sync for modern APIs. Try the free tier on RapidAPI or check out the docs: #buildinpublic #API #FastAPI