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What is Onymu?

Onymu is a free domain name generator and naming toolkit. Give it a word, theme, or business idea and it suggests brandable names, then checks availability across 1,400+ TLDs, social handles, and app stores in seconds. It also includes WHOIS/DNS lookup, domain appraisal, and brand preview mockups, so you can go from an idea to a name you can actually register without switching tools.

Onymu is listed in the official MCP registry, and the same tools that power the website are exposed directly to MCP clients, so an agent can search, generate, and shortlist names on your behalf instead of just describing how to do it.

MCP tools

• search_domains: check a name's availability across many TLDs in one call
• generate_domains: get brandable name ideas for a theme or keyword
• check_usernames: check handle availability across social platforms and app stores
• list_favorite_tlds / add_favorite_tld / remove_favorite_tld: manage which extensions to prioritize in a search
• list_saved_domains / save_domain / remove_saved_domain: keep a shortlist of names worth registering
• get_recent_searches / get_recent_generations: pick up where a naming session left off

This lets an agent go from "help me name my project" to a checked, available domain without leaving the conversation. Always confirm with your registrar before buying.