I built in-app Polymarket copy trading with MetaMask EIP-712 — no private keys,

<p>I've been working on crypto exchange trading bot (python) for a while and wanted to share what I learned.</p> <h2> The problem </h2> <p>Production-ready Python trading bot for

<p>The problem: I kept missing big moves on Polymarket because I had no way to see what the biggest traders were betting on in real time.</p> <p>So I built WhaleTrack — a free,

<h1> How I built keyless OAuth sign-in for my AI companion: PKCE, a single-use loopback callback, and a token that never touches disk </h1> <p>Ankita is my open-source desktop AI

<p>I went looking for "the Polymarket API" and spent an hour confused before realizing that's the wrong mental model entirely. There isn't one API — there are three separate