CloseRouter is a unified API service that brings models from Anthropic, OpenAI, Google, and other developers together under one account, balance, and API key. It is designed to simplify access to multiple AI providers while helping users manage model selection and costs from a single place. Users can choose Auto routing, which seeks the cheapest available route while considering compatibility and availability, or manually configure a provider sequence using selected routes. Routing options can be managed on the Models page, where model information and pricing are available.

CloseRouter provides an API base URL and documentation for connecting applications, and its examples show compatibility with common request formats and tools such as Codex and Claude Code. The service also offers account creation and a Telegram connection incentive: new users can receive $1 in account balance after linking Telegram. Its website includes a blog, service policies, and security information, giving developers a central starting point for accessing and routing requests across supported AI models.