
NexArb
AI arbitrage engine for Amazon, Walmart & Alibaba
What it does
Fully automated arbitrage platform finding profitable deals across Amazon FBA, Walmart WFS, and Alibaba. Scans 14,000+ products 3x daily, checks gating with real API data, calculates verified margins, and routes deals to the highest-profit channel. Features Claude AI scoring, real verified margins, live WebSocket dashboard, Telegram alerts. Early access open — first 50 signups get 3 months free at nexarb.io
NexArb's agentic AI monitors thousands of products, verifies real margins, and routes each deal to its most profitable channel — without you lifting a finger. NexArb checks gating on both Amazon and Walmart simultaneously, calculates verified margins for each channel, and routes automatically to the highest-profit destination. When both are gated, it surfaces the equivalent product on Alibaba for private label sourcing. Powered by Claude Haiku, NexArb analyses BSR, competition depth, margin confidence, and category risk to score each product. Top picks land in your Telegram the moment they're found. A 50% Walmart floor filter eliminates deals that only work on paper. Every recommendation is…from nexarb.io
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Arbitrage AgentMay 2026 · arbitrage-agent.com · ▲2Automated arbitrage across Polymarket & Kalshi markets


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Hey HN, Henry from Cactus here! We previously released Cactus Needle, a 14MB agentic LLM for tool call, device use, and structured extraction for phones, wearables, smart homes, small robots and microcontrollers. We got really great feedback here, and have now incorporated the suggestions to release Needle 2. The whole model is a single 14MB binary that runs a full session in 28MB of RAM; 45m parameters at 2bit compression. Needle hits 500 tokens/sec decode speed on a Raspberry Pi 5, sits between 400-1,500 tokens/sec on VR devices like Meta Quest 3S and Apple Vision Pro, and ranges…
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Launched alongside, August 2026
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Life & fun · 11d ago · louisabraham.github.io



Hello HN! I found that picking out plausible but diverse skin tones for my digital art and game development projects was kind of difficult, and I got curious about if there was a way to define a color space that made it easy. I've built a color picker and procedural generation algorithm based on the space as well as a bunch of other fun js features and demos throughout the page that use the equations. If you find it interesting, I have lots of explanations of how I built it and what properties the space has. The methodology might be a bit shaky, but hopefully the result is as helpful for…
Life & fun · Aug 2026 · toneyalexander.github.io


I trained a 125M-parameter transformer to autocomplete piano performances in real time (~108 notes/sec on an iPhone 15). The idea is basically GitHub Copilot or Tabnine, except instead of prompting it with code, you prompt it by playing a few notes on a MIDI piano. The model then continues what you played, entirely on-device. The app is free if anyone wants to try it. Happy to answer questions about the model, training, Core ML, or the many things that didn't work.
AI · 17d ago · simedw.com