Using a Claude Subscription in Cursor without Paying for API Tokens

This article explains how to use a Claude subscription in the Cursor AI assistant without paying for API tokens. It involves setting up a proxy process and a Cloudflare tunnel to convert requests between the OpenAI and Anthropic formats.

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The article describes a process to use a Claude subscription in the Cursor AI assistant without paying for API tokens. Cursor supports connecting to any LLM via API that is compatible with the OpenAI request format, but Claude's subscription can only be used in Claude Code, which uses a different Anthropic request format. The article presents a solution that proxies requests from Cursor to Claude, converting the request formats. This involves starting a proxy process that handles the format conversion, setting up a Cloudflare tunnel to provide a public URL that routes traffic to the local proxy process, and configuring Cursor to use the Cloudflare URL. The entire setup takes around 30 seconds, and users can then use their Claude subscription in Cursor without paying for API tokens. The article also discusses some limitations and requirements of the solution, such as the need to map Cursor tools to Claude Code tools and handle changes to large documents and plans.