is the domain for my startup name already taken
You get, for each name, whether its domain is available or registered in .com, .net, .org, .ai, .app and .dev. Pass up to 5 names to check_domain_availability, and use tlds to choose other endings.
The result shows the status at that moment and reserves nothing. For a taken domain you also get its registration, expiry and last-change dates when the registry publishes them. Premium or reserved names can be unavailable or cost more. Tool: check_domain_availability on https://names.openkrill.app/mcp.
check if acme.com is available
You get whether that exact domain is available or registered, plus the source of the answer. Pass the full domain, such as acme.com, to check_domain_availability.
A full domain is checked on its own. The result is indicative: it shows the status at that moment and does not reserve the name. Trademarks are not searched, so run a trademark check before you commit to a name. Tool: check_domain_availability on https://names.openkrill.app/mcp.
find an available .com for my bakery name
You get whether the .com for each bakery name is available or registered. Pass up to 5 candidate names to check_domain_availability and limit tlds to com.
The result includes cost when Cloudflare Registrar returns it. Owner and contact details are never returned, even for a registered domain. Tool: check_domain_availability on https://names.openkrill.app/mcp.
does a domain availability check reserve the name
You get each domain's status at that moment, as available, registered, unsupported or unavailable, and nothing is reserved or charged. Pass up to 5 names or domains to check_domain_availability.
Cloudflare Registrar is asked first, and the registry's RDAP service is used when that API is not configured or does not cover the ending. Premium or reserved names can be unavailable or cost more. Answers are cached for up to five minutes. Tool: check_domain_availability on https://names.openkrill.app/mcp.
show registration and renewal price for an available domain
For an available domain you get registrationCost and renewalCost when Cloudflare Registrar returns them. Pass the name or domain to check_domain_availability, with tlds for the endings you choose. That figure is not a charge.
Cost appears when Cloudflare Registrar returns it. The figure does not reserve the name, and premium or reserved names can cost more. Tool: check_domain_availability on https://names.openkrill.app/mcp.
Run it yourself
This page does not return live data. Call the tool on the server to get it. The server is Startup Name Check at https://names.openkrill.app/mcp, with no key. Install steps: ChatGPT, Claude, Cursor, VS Code, Pi. A call to check_domain_availability was posted to the live server on 2026-10-17, and the install pages show it. The full tool list is in the install guides.