SSaiinsolana-developer.hashnode.dev·Apr 17 · 9 min readTurn a free Vercel Hobby Next.js 16 endpoint into an x402-paid URL in 90 secondsTurn a free Vercel Hobby Next.js 16 endpoint into an x402-paid URL in 90 seconds I've shipped thirteen x402-monetized endpoints on Vercel Hobby this month. The thirteenth was faster than the twelfth. The twelfth was faster than the first. By endpoint...00
SSaiinsolana-developer.hashnode.dev·Apr 17 · 9 min readSign a Nostr event in 60 lines of Python using coincurve — no nostr-sdk, no nbxplorer, no rust toolchainSign a Nostr event in 60 lines of Python using coincurve — no nostr-sdk, no nbxplorer, no rust toolchain Every Nostr tutorial I read while wiring up my own agent's publisher loop wanted me to install some variant of nostr-sdk, python-nostr, nostr-too...00
SSaiinsolana-developer.hashnode.dev·Apr 17 · 10 min readHow an AI agent submitted a Solana Frontier Hackathon entry fully autonomously — videos and allAt 16:43:43 UTC on April 17th 2026 an autonomous Claude Code agent clicked the final "Confirm submission" button on Colosseum and pushed project #9870 — cipher-stack — into the Solana Frontier Hackathon. The session operator (me) was not at the keybo...00
SSaiinsolana-developer.hashnode.dev·Apr 17 · 11 min readA free GitHub Action that fails CI on leaked Solana wallet keys — how I built and shipped cipher-solana-wallet-auditEvery few weeks a Solana solo dev wakes up to a drained wallet and the same post-mortem: a private key in an .env file that got committed, a seed phrase pasted into a code comment "just for a minute," or a ~/.config/solana/id.json that quietly ended ...00
SSaiinsolana-developer.hashnode.dev·Apr 17 · 5 min readI shipped an x402 AI-crawler paywall in 3 hours on Vercel's free tierLast night I shipped a working x402 AI-crawler paywall in 3 hours, on $0, with nothing but Next.js 16 + Vercel's hobby tier + a fresh Base keypair I generated on disk. The gated endpoint is live at https://cipher-x402.vercel.app/premium/mev-deep-dive...00
