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Documentation

Welcome to DomainKit! This documentation will help you get started with our domain availability API.

DomainKit provides a simple, fast API for checking whether domain names are available for registration. Whether you’re building a domain search tool, an AI agent, or just need quick availability checks, we’ve got you covered.

Quick Links

Quickstart →

Get up and running in minutes

API Reference →

Full endpoint documentation

Authentication →

Learn about API access

What Can You Build?

DomainKit is perfect for:

• Domain search tools — Let users find available domains instantly
• AI agents — Give your LLM the ability to check domain availability
• Startup name generators — Validate that generated names have available domains
• Portfolio management — Monitor domain availability across your brands
• Registrar integrations — Add availability checks to your registration flow

Key Features

• Fast — Sub-100ms response times
• Simple — No API keys required during beta
• Reliable — Built on proven infrastructure
• AI-Ready — Includes llms.txt and OpenAPI spec for agent discovery

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