Build a Phone Number Intelligence Tool with Twilio Lookup on Replit

Twilio’s tutorial explains how to use Replit Agent to create and deploy a password-protected phone number intelligence web app powered by Twilio Lookup v2. The app allows users to enter a phone number, select supported Lookup data packages, and retrieve information such as number validity, line type, carrier, and fraud-related risk signals before contacting or accepting registrations from that number. Users need free Twilio and Replit accounts, along with Twilio API credentials and an application password stored as environment variables. The guide recommends prompting Replit Agent with the app’s requirements, testing the generated application, publishing it through Replit Autoscale, and iteratively refining it because AI-generated results may vary. It also highlights common issues, including E.164 phone-number formatting, incorrect password settings, and error 60606 when a requested Lookup package is unavailable or requires account approval.

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