For AI agents · MCP

Let your agent check domains.

Namestorm’s availability engine, exposed as a Model Context Protocol tool. Your agent brainstorms names; the tool tells it which are actually open.

POSThttps://namestorm.app/api/mcp

Connect your client See the tool

Free with your Namestorm account. Create a key →

POST /api/mcpjson-rpc · stateless

→ tools/call

check_domain_availability([

"lumen.com", "lumen.io", "lumenlabs.dev"

])

← 3 results

lumen.comtakenvia rdap

lumen.iotakenvia rdap

lumenlabs.devavailablevia dns

Availability is an estimate. Confirm at a registrar before buying.

How it works

Create a key

Add the server

Point your MCP client at the endpoint and pass the key as an Authorization: Bearer header. Config is below.

Check domains

Your agent brainstorms names and calls check_domain_availability to see which are open, live.

The tool

check_domain_availabilityread-only

Checks whether fully-qualified domains are registered. The agent supplies the names; the tool returns live status.

Input

domainsstring[] · 1–50

Fully-qualified domains like "acme.com", "acme.io".

Output

An array of results, one per domain:

domainstring

The domain that was checked.

statusenum

availabletakenunknown

sourceenum

Who answered: rdap (authoritative registry) or dns (heuristic fallback).

Connect your client

Works with any Streamable-HTTP MCP client. Swap ns_your_key_here for a key from your dashboard.

Claude Code (CLI)

claude mcp add --transport http namestorm \
  https://namestorm.app/api/mcp \
  --header "Authorization: Bearer ns_your_key_here"

MCP client config (JSON)

{
  "mcpServers": {
    "namestorm": {
      "type": "http",
      "url": "https://namestorm.app/api/mcp",
      "headers": {
        "Authorization": "Bearer ns_your_key_here"
      }
    }
  }
}

Smoke test (curl)

curl -s https://namestorm.app/api/mcp \
  -H "authorization: Bearer ns_your_key_here" \
  -H "content-type: application/json" \
  -H "accept: application/json, text/event-stream" \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"check_domain_availability","arguments":{"domains":["your-idea.com","your-idea.io"]}}}'

Good to know

Availability is an estimate. Results come from RDAP and a DNS fallback. Confirm at a registrar before buying.
Keys are personal and revocable. Each maps to your account; revoke one on your dashboard and it stops working immediately.
Batches cap at 50 domains. Send one call per name set; your agent can run several in parallel.
Be considerate. Heavy automated use may be rate limited so the shared availability cache stays fast for everyone.