I Built an Autonomous Phone Verification Agent (Full Code + Tutorial)

You built an AI agent that can browse the web, fill forms, and make decisions. But it hits a wall every single time: "This phone number cannot be used for verification." Stripe. WhatsApp. Google. All of them run a carrier lookup. All of them block VoIP. And every cloud phone API returns line_type: VoIP. Your agent is stuck. Not because it's dumb. Because the infrastructure is wrong. Today I'll show you how to fix it. Full code. Real results. The Problem in 30 Seconds When Stripe receives a phone number, it doesn't just send an SMS. First, it queries the LERG/NPAC databases to check: what type of number is this? $ curl https://lookups.twilio.com/v2/PhoneNumbers/+16505550001 { "line_type_intelligence": { "type": "voip", "carrier": "Twilio Inc." } } Result: REJECTED. Stripe blocks VoIP numbers for verification. Always. The same check happens at Google, WhatsApp, Telegram, banks. If your agent uses a cloud phone number, it will fail. The Fix: Real SIM Infrastructure The solution isn't a ha