web4-watchbot/web4-automaton

Self-hosted, self-custody micro-SaaS platform on a single Mac Mini — nine products, one USDC billing rail

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updated Oct 6, 2026

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Source	Message	Score	Date
	Show HN: Self-custody USDC billing for metered APIs – no Stripe, no bank, $0/mo	2	Oct 6, 2026

README

web4-automaton

A self-hosted, self-custody micro-SaaS platform running on a single Mac Mini. Nine products, one billing rail, zero cloud bills.

Products

#	Product	Price	Status
01	Watchbot (URL change detection)	1¢/check	live
02	Grant Radar	5¢/match	live
03	Tender Radar	$49/30d	live
04	Radar Packs	10¢ arm	live
05	Visa Slot Radar	$19/30d	live
06	WhaleBot (chain watches)	5¢/alert	live
07	Weekly Digest	25 cr/send	live
08	Lead Radar (Google Maps)	10¢/lead	live
09	MCP Server (9 tools)	per-call	live

Architecture

Single Mac Mini → Node.js + SQLite → Cloudflare Tunnel → public HTTPS. Billing: USDC/USDT/ETH on Base + Ethereum, self-custody, watcher auto-credits.

Documentation

Self-Custody Billing Rail Deep-Dive — how the automaton charges USDC without Stripe, without a bank, on a $0/mo stack

Live

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