Instant Domain Search

Keystroke-speed domain availability across 800+ TLDs, with a free MCP server

Tier S · Best in classToolMCP ServerGeneratorinstantdomainsearch.com

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An ICANN-accredited registrar whose front end checks domain availability in real time as you type, across 800+ extensions, with dedicated landing pages for .ai, .io, .com, .net, .org, .info, .app, .co, .me, .online, .xyz and .dev. Beyond plain search it ships an AI domain generator, a business-name generator, bulk search for up to 5,000 domains with CSV import/export and multi-registrar price comparison, aftermarket search across Afternic / Sedo / Atom / Sav, an expired and pending-delete domain browser, a Raycast extension, and a domain directory. Most importantly for agents, it exposes a free, no-auth MCP server at api.instantdomainsearch.com with search_domains, generate_domain_variations and check_domain_availability.

For an agent

This is the one naming tool you can actually call rather than screenshot: connect the streamable-HTTP MCP endpoint at https://api.instantdomainsearch.com/mcp/streamable-http — no key, no auth, responses around 10 ms — and use check_domain_availability to verify before you ever suggest a product name to a user. Pair generate_domain_variations with a username check so you do not ship a name whose .com is taken or whose handle is gone. Watch two things: it is a registrar, so the 'best deal' ordering is commercially motivated, and availability is a point-in-time answer — re-check immediately before the user registers.

Why it is here. It is the rare naming utility built for machines as well as humans; a free unauthenticated MCP endpoint turns 'is this name free' from a manual browser task into a tool call inside the naming loop.

Install command, framework, licence and component list.

Facts

License: Proprietary / all rights reserved
Pricing: Free, Freemium
Framework: Not applicable
Styling: Not applicable
Distribution: Web app / online tool, MCP server, Hosted SaaS product
Platform: Web
Content type: Dataset / structured records
Agent readiness: MCP server, Public API without auth
Accessibility: Unknown
Maturity: Actively maintained
Pricing detail: Search, the generators, bulk search and the MCP server are free with no account; revenue comes from domain registration as an ICANN-accredited registrar and from aftermarket referrals.

Notable for

Free no-auth MCP server, three tools
800+ TLDs checked as you type
Bulk search up to 5,000 domains with CSV
Aftermarket and expired-domain browsing
Raycast extension and Cursor deeplink install

Provenance

Verified 2026-08-15. HTTP 200. https://instantdomainsearch.com (WebFetch), https://instantdomainsearch.com/mcp (WebFetch — endpoint URL, the three tool names, Cursor deeplink and the 'free tool' statement)

Also in Utilities & Naming

instantdomainsearch.comTier S