username.dev

What is username.dev?

A simple API that enforces username rules for modern apps. Detects brands, profanity, reserved words, and premium names with a single request. Runs on a global edge network for low latency and returns enriched JSON with category metadata, country codes, and language info. Built to help product, trust & safety, and growth teams automate moderation, protect identities, and monetize premium handles without maintaining blacklists.

Key features

• Identify brands, public figures, cities and reserved keywords instantly.
• Returns metadata like country codes, languages, and category IDs.
• Powered by a global edge network for low-latency responses.
• Handles case sensitivity, Unicode, and whitespace via smart normalization.
• Built on KV and D1 storage for fast, reliable reads.
• Includes rate limiting, encrypted keys, and strict authentication standards.