Engineering

Security and two-factor authentication concept with a padlock over code

EngineeringJun 18, 20262 min read

2FA at Scale Without the Per-Verification Tax

Most 2FA APIs bill you per verification and cap you out. Here's a flat-rate, no-hard-caps way to verify users at scale over iMessage — with a live demo you can try right now.

#2FA #Security #iMessage #API

iMessage AI bot architecture — webhook to LLM to reply

EngineeringMay 28, 20265 min read

How to Build an iMessage AI Bot in 2026 (Production-Ready Patterns)

Plugging GPT-4o, Claude, or any LLM into iMessage gets a working bot in 50 lines of code. Shipping one that survives production — typing indicators, message splitting, conversation memory, idempotent webhooks, image handling — is a different story.