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Domain Checker

Find an available domain

Lightning-fast availability checks across hundreds of TLDs. Ultra-low-latency lookups powered by Lynk's edge instance — tell us a name, we tell you what's free.

🔍 Try our API: https://api.lynk.run/domains/v1/check/example.com click to copy
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Lightning fast

Sub-second responses across the entire TLD set. Cache hits come back in single-digit milliseconds — hundreds of names in one request.

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Ultra-low latency

Lynk's edge instance answers most lookups in tens of milliseconds. Massively parallel by default — no queueing, no waiting.

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One unified API

The same Lynk API key works across every service — Domains, Intel, BGP, Scraper. Also available as an MCP tool for AI agents.

Need more? Get your Lynk API key

Full access to the Domain Checker API. One key works across all Lynk services.

Register at api.lynk.run to get your unified Lynk API key — works across all Lynk services

🔍 API Documentation

Integrate domain availability checks into your tools and workflows. View full API docs →

Batch Check

POST
https://api.lynk.run/domains/v1/check

Pass a bare name to fan out across tlds, and/or explicit domains. Max 50 domains per request.

curl -H "Authorization: Bearer lynk_your_api_key" \
  -H "Content-Type: application/json" \
  -d '{"name":"mycoolstartup","tlds":["com","io","ai"]}' \
  "https://api.lynk.run/domains/v1/check"

Single Domain

GET
https://api.lynk.run/domains/v1/check/:domain
curl "https://api.lynk.run/domains/v1/check/example.com"

Example Response

{
  "summary": { "total": 3, "available": 1, "taken": 2, "unknown": 0 },
  "elapsed_ms": 240,
  "invalid": [],
  "results": [
    {
      "domain": "mycoolstartup.com",
      "tld": "com",
      "status": "taken",
      "checked_at": 1779480000000
    },
    {
      "domain": "mycoolstartup.ai",
      "tld": "ai",
      "status": "available",
      "checked_at": 1779480000000
    }
  ]
}

Status is available, taken or unknown. unknown means the lookup couldn't be confirmed — it does not mean "available".

🤖 Use with AI / LLM Agents

The Domain Checker is available as the domain_check MCP tool. Connect any MCP-capable agent (Claude Desktop, Cursor, Cline) — the full spec lives at:

https://api.lynk.run/mcp/llms.txt