Prevent impersonation and protect brands with a fast, scalable username governance API for modern apps.
Usernames are often the first thing users see when signing up for a platform. They’re simple at first glance, but as soon as someone grabs a reserved, premium, or impersonation-prone username, things can quickly turn messy. Admins get confused, support tickets spike, trust is eroded, and internal “reserved username” lists grow into unmanageable tech debt.
Username.dev is an API designed for developers who want to take username governance seriously from day one. Whether you’re building a social network, a marketplace, or any app that relies on unique handles, our API helps you:
Prevent reserved or restricted usernames – block critical roles like admin, support, or system.
Protect premium or high-value usernames – ensure your most valuable handles aren’t taken prematurely.
Mitigate impersonation risk – stop users from registering usernames that mimic brands, celebrities, or internal accounts.
Simplify enforcement – no more sprawling internal lists or brittle regex rules. One API call integrates governance directly into your signup flow.
With username.dev, you get a developer-friendly API that’s easy to integrate, reliable, and built with real-world challenges in mind. It helps you protect your platform’s integrity, reduce future headaches, and give users a clean, predictable experience.
We built this after seeing too many products struggle with username rules that start small and slowly spiral into technical and operational debt. Username.dev is a small but powerful tool to keep that problem under control — from launch day and beyond.
Use cases include:
Social apps preventing impersonation
Marketplaces protecting brand and premium handles
Communities enforcing trust and safety rules
Any platform where unique usernames matter
Whether you’re launching your first side project or scaling a SaaS product, username.dev ensures you don’t have to scramble when the first critical username conflict happens. It’s governance, validation, and protection — all in one API.
