How I built a pure client-side lead engine with hardcoded mainnet RPC payment validation (Vanilla JS)

javascript dev.to

I built a lightweight, zero-backend boilerplate for web design agencies and micro-SaaS builders who want to run a lead scraper UI with zero monthly hosting costs.

Tech Stack & Architecture

  • Pure Vanilla JS & HTML: $0/mo Vercel or Netlify static hosting.
  • On-Chain RPC Verification: Queries public mainnet endpoints directly (Mempool API for BTC, Solana RPC, and TronScan API) to verify transaction hashes on-chain before unlocking features.
  • Dark-Mode Agency Dashboard: Fully responsive and ready for re-branding.

Live Showcase & Repo

Selling the full commercial source code package for $80 (USDT / SOL / BTC). Direct unlock on the live demo or via DM on X (@Neovis_support).

Would love feedback on client-side RPC verification performance!

Source: dev.to

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