Article URL: https://xeiaso.net/notes/2026/everyone-slowdown-but-me/ Comments URL: https://news.ycombinator.com/item?id=49678683 Points: 797 # Comments: 450

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ExternalSoftware Engineering

DEV Community13 Sept 2026

I Found an Undocumented MCP Server on OpenSea — and It Leaked Usernames for Any Wallet

TL;DR: OpenSea runs an undocumented MCP server at mcp.opensea.io/mcp. One of its tools hands out API keys to anyone who asks, and another lets you resolve any Ethereum address with an OpenSea profile to its owner's username. Reported to Bugcrowd, now sharing the story and a free recon kit. I was poking around OpenSea's tooling one afternoon — just trying to understand how some of their internal features worked. Nothing fancy, no scanners, no brute force. Just curiosity and a browser. That's when

webdev

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ExternalTechnology Trends

Hacker News13 Sept 2026

TailTalk: A modern async user space AppleTalk stack with Rust and Tokio

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Hacker NewsRead original

ExternalSoftware Engineering

DEV Community13 Sept 2026

I described 1,245 tables with an LLM and retrieval got worse

The cataloguing step is supposed to be the easy win. You have a schema whose ecm_template_link and v_pmpm, your users ask questions I did that to a real 1,245-object schema. Recall went down. Not by a little. The table literally called contacts sat at rank 3 for the This post is what was actually happening, why the obvious fix doesn't work, Every description you generate is written in the same vocabulary as every BM25 scores a term by inverse document frequency: idf(t) = log(1 + (N - n_t + 0.5)

aillmrag

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