domainmcp
Use the API Add the MCP
SearchCheck a name across every endingDomain pricesFirst year and renewal, every endingMCP setupClaude, ChatGPT and Gemini in a minuteAPIOpen REST endpoints, no key neededDocumentationEvery endpoint, tool and limit
Use the APIAdd the MCP

Domain search API and MCP documentation

Check any domain from your code or your assistant.

Domain MCP answers whether a domain is free, what it costs to register and renew, and who holds it when it is taken. Use it as a plain REST API or add it to Claude, ChatGPT, Gemini or your editor as an MCP server. Everything is free, with no key and no sign-in.

FreeNo keyNo sign-inJSON over HTTPSMCP server

Start here

1

Make your first call

Paste one line into a terminal and see which endings of a name are free, with today's domain prices.

Quick start
2

Add it to your assistant

One address for Claude, ChatGPT, Gemini, Cursor and the rest. Then ask about domains in plain words.

MCP setup
3

Read a result

What available, taken and unknown mean, how a free answer gets confirmed, and where the price comes from.

Reading a result

Subjects

Guides

How answers are made, the limits, the errors, domain prices and buy links.

All guides

Endpoints

Six GET calls on api.domainmcp.net, each with a Try it box and code in four languages.

All endpoints

Assistants

The MCP server, its five tools, the agent skill, and a walkthrough for each assistant.

All assistants

For machines

The whole manual in one file, a short index for language models, and an OpenAPI description.

The manual

Endpoints

GET/v1/checkGive up to 50 full domains and find out which are free to register.
GET/v1/searchGive one name and get back every ending you ask for.
GET/v1/suggestDescribe a business or project in a few words and get back name ideas.
GET/v1/detailsEverything known about one domain.
GET/v1/pricesThe public price of registering a domain on any ending.
GET/v1/usageHow much of your allowance is left this minute and today.

Popular calls

Is it free?curl "https://api.domainmcp.net/v1/check?domains=brightfield.com"
Every endingcurl "https://api.domainmcp.net/v1/search?name=brightfield"
Who holds itcurl "https://api.domainmcp.net/v1/details?domain=example.com"
Domain pricescurl "https://api.domainmcp.net/v1/prices?tlds=com,io,ai"

Assistants and agents

Add the server as a custom connector and your assistant can check names, search endings, suggest free names and look up domain prices for you.

MCP server addresshttps://domainmcp.net/mcp
Agent skillhttps://domainmcp.net/skill.md

Limits

60 a minutePer address
Domains checked, not calls made: a search across 12 endings counts as 12. Every answer carries X-RateLimit-Remaining.
2,000 a dayPer address
Resets at 00:00 UTC. /v1/usage shows what is left and when it resets.
4 a minuteSuggestions
Name ideas take longer to make, so they have their own allowance of 4 a minute and 60 a day.

What's new

Documentation: a page for every endpoint, tool and assistant, with manual.md, llms.txt and openapi.json.
Name suggestions: describe an idea and get back only names that are free to register.
The MCP server and agent skill, with five tools.

Every change

Questions

Is it really free?

Yes. There is no key, no account and nothing to pay. When a name is free, the answer includes a link to register it, and that is how the service pays for itself.

How fresh is an answer?

Each result carries checked_at and confirmed. A free answer from DNS alone is confirmed with the registry within about a minute; ask again to see it.

Can I register a domain here?

Not yet. A free result's buy_url opens a registrar with the name ready to buy.