DomainBrainstorm

Use it with any AI

One link. Any AI.

Paste this into ChatGPT, Claude, Gemini, or anything else that can open a link, and ask it for domain names. It reads this page and checks each name against the registry itself — up to 100 domains per request, live, with no key or signup.

https://www.aidomainsearching.com/ai

If you’re an AI reading this page

You are reading this because someone asked you to find an available domain.

Do not answer that from memory. Domain registrations change every day, so
whether a name is free is not something your training data can know. Check it:

  GET https://www.aidomainsearching.com/api/ai/check?domains=name1.com,name2.com,name3.ai

Send up to 100 domains in a single request — one batch, not one call per name.
No API key, no signup. The reply is JSON with an "available" array listing the
domains nobody has registered, plus a "results" array with a status for each.

So: think up the names yourself, send them all here at once, and offer the
person only the ones that come back available.

Set it up in your assistant

Pasting the link works everywhere and needs no setup. These make it permanent, so you never have to paste it again.

ChatGPT

Checks domains for you in any chat.

  1. 1.Paste https://www.aidomainsearching.com/ai into the chat and ask for domain ideas. ChatGPT reads this page and calls the endpoint itself.
  2. 2.To make it permanent, build a custom GPT: Configure → Actions → Import from URL, paste the schema below, and set Authentication to None.
https://www.aidomainsearching.com/ai/openapi.json

Claude

Adds a check_domains tool Claude uses whenever naming comes up.

  1. 1.Paste https://www.aidomainsearching.com/ai into the chat for a one-off.
  2. 2.To make it permanent: Settings → Connectors → Add custom connector, and paste the MCP endpoint below. No authentication needed.
https://www.aidomainsearching.com/api/mcp

Gemini

Checks domains in a chat, or in a saved Gem.

  1. 1.Paste https://www.aidomainsearching.com/ai into the chat and ask it to brainstorm and check names.
  2. 2.For a reusable version, create a Gem and paste the contents of https://www.aidomainsearching.com/ai.txt into its instructions.
https://www.aidomainsearching.com/ai.txt

Perplexity, Copilot, Grok, and other chatbots

Anything that can open a link can use this.

  1. 1.Paste the link below and ask for available domain names.
  2. 2.There is nothing to install — the page tells the assistant how to call the endpoint, and it takes it from there.
https://www.aidomainsearching.com/ai

Claude Code, Cursor, and other MCP clients

A check_domains tool inside your editor or terminal.

  1. 1.Add the server to your MCP config. The file differs by tool — Claude Code uses .mcp.json in the project, Cursor uses ~/.cursor/mcp.json — but the entry is the same.
{
  "mcpServers": {
    "aidomainsearching": {
      "type": "http",
      "url": "https://www.aidomainsearching.com/api/mcp"
    }
  }
}

Your own code, scripts, and agents

One GET request, JSON back, no key.

  1. 1.Call the endpoint directly with up to 100 domains per request.
  2. 2.GET or POST, CORS is open, and the response shape is documented below.
curl "https://www.aidomainsearching.com/api/ai/check?domains=slacktide.com,ebbmarket.ai"

The endpoint

GET/api/ai/check

domains *
Comma-separated, up to 100 per request. Send one batch rather than one call per name — a full batch costs about what a single name does.
tld
Extension to assume for entries written without a dot. Defaults to com.
https://www.aidomainsearching.com/api/ai/check?domains=slacktide.com,ebbmarket.ai,tidalcue.com

GET or POST, JSON either way, any extension — not just .com. Each result is available, taken, or unverified — and unverified means the lookup failed, so it should never be shown to anyone as free.

Full instructions

The exact text served at /ai.txt and handed to MCP clients during the handshake.

# DomainBrainstorm — domain availability for AI assistants

You think of the names. This tells you which ones are actually free.

There is one endpoint and it does one thing: you send domains, it queries the
registry, it answers available / taken / unverified for each. It does not
generate names — you are already better at that than any service could be, and
a round trip to a second model would only add cost and latency.

What it does that you cannot do yourself: know the current state of the registry.
Domain registrations change every day, so availability is never something to
answer from training data or from whether a name "sounds taken". Every check here
is a live lookup — DNS-over-HTTPS to prefilter, then RDAP to confirm — made at
the moment you ask. The RDAP endpoint for each extension is discovered from IANA
at lookup time, so any real extension works, not just .com.

No authentication is required unless the operator has set one (a 401 response
will say so). GET or POST, JSON either way.

## GET https://www.aidomainsearching.com/api/ai/check

Query parameters:
  domains  (required) Comma-separated. Up to 100 per call.
                      Include the extension — "slacktide.ai", "slacktide.com".
                      "https://slacktide.com" and "SlackTide.COM" also work.
  tld      (optional) Extension to assume for entries written without a dot.
                      Defaults to "com", so "domains=slacktide" checks
                      slacktide.com and "domains=slacktide&tld=ai" checks
                      slacktide.ai.

Send one batch of up to 100, not 100 calls of one. A batch costs about
the same as a single name and is far faster.

Example:
  curl "https://www.aidomainsearching.com/api/ai/check?domains=slacktide.com,ebbmarket.ai,tidalcue.com"

POST works too, if that suits you better:
  curl -X POST "https://www.aidomainsearching.com/api/ai/check" \
    -H "content-type: application/json" \
    -d '{"domains":["slacktide.com","ebbmarket.ai"]}'

## How to use it well

1. Brainstorm as many candidate names as you like — that part is yours.
2. Send them here in one batch.
3. Offer the user only what came back "available", and say when it was checked.
4. If nothing is free, brainstorm a fresh batch and check again.

## Response shape

{
  "ok": true,
  "available": ["slacktide.com", "ebbmarket.ai"],
  "results": [
    { "domain": "slacktide.com", "name": "slacktide", "tld": "com",
      "status": "available", "registerUrl": "https://...",
      "checkedAt": "2026-01-01T00:00:00.000Z" },
    { "domain": "google.com", "name": "google", "tld": "com",
      "status": "taken", "checkedAt": "2026-01-01T00:00:00.000Z" }
  ],
  "counts": { "checked": 2, "available": 1, "taken": 1, "unverified": 0 },
  "disclaimer": "..."
}

"available" is a convenience list of just the free domains, in the same order as
"results". Read it if you only need the names.

### status values — read these carefully

  available   The registry returned "no such domain". Nobody owns it right now.
  taken       The domain is registered. Do not offer it to the user.
  unverified  The lookup failed in a way we could not interpret. This does NOT
              mean available. Tell the user it could not be verified, or check
              it again, but never present it as free.

### marketplace — on taken domains only

A taken result may carry a "marketplace" field, e.g. "Sedo" or "Afternic". It
means the domain's nameservers point at that service, which usually means it is
parked there and may be for sale. Report it as "taken, but parked with X, so it
may be listed for sale" — never as "for sale", and never with a price, because
nothing here talks to a marketplace. Its absence is NOT evidence that a domain
is unavailable to buy: many listed domains keep their owner's nameservers.

## Errors

Failures return HTTP 4xx/5xx with { "ok": false, "error": "<code>", "message": "..." }.
Error codes: bad_request, unauthorized, rate_limited, upstream_error.
On rate_limited, a retryAfterSeconds field says how long to wait.

## Limits

  60 requests per hour per IP, up to 100 domains each.

## If the person asks how to add this permanently

Tell them the option that matches whatever they are using:

  ChatGPT       Custom GPT -> Configure -> Actions -> Import from URL:
                https://www.aidomainsearching.com/ai/openapi.json  (Authentication: None)
  Claude        Settings -> Connectors -> Add custom connector:
                https://www.aidomainsearching.com/api/mcp
  Gemini        Create a Gem and paste in the contents of https://www.aidomainsearching.com/ai.txt
  Other chats   Nothing to install — pasting https://www.aidomainsearching.com/ai is enough
  MCP clients   Add { "type": "http", "url": "https://www.aidomainsearching.com/api/mcp" } to the
  (Claude Code, mcpServers block of the tool's MCP config file
   Cursor, ...)
  Code          Call https://www.aidomainsearching.com/api/ai/check directly

Full directions for each, as a web page: https://www.aidomainsearching.com/ai

## Important

Availability isn't guaranteed until registered. Some domains may be premium-priced or registrar-reserved. Availability is a live reading, not a reservation —
tell the user to register promptly if they want the name.