Use ChatGPT and Claude subscriptions in Cursor

Why would I use?

Based on heavy-usage comparisons (Claude Code 20x vs Cursor Pro usage), subscriptions deliver 3x to 5x more tokens.

Subscriptions win

ChatGPT Pro/Max and Claude Pro/Max deliver more tokens (3x to 5x) per dollar than Cursor usage pricing.

Use existing subscriptions

If you're already paying for ChatGPT or Claude, you don't need Cursor Pro+ or Ultra anymore.

Keep Cursor UX

Chat, agents, tools, auto-complete all work. Best Agentic IDE without messing up with terminals.

Use Cursor chat, agents, and tools with your subscription tokens. Autocomplete still needs a Cursor plan.

Keep autocomplete from Cursor Pro and add subscription tokens for heavy sessions.

Ultra pricing is still 3x to 5x higher than subscriptions. Route heavy usage through Sub Bridge.

Max plans give the highest token value. Use them in Cursor without extra token spend without messing up with the terminals.

How to Setup

Install Sub Bridge in 3 steps.

Install Sub Bridge

Use Add to Cursor above, or add it manually.

Cursor Settings -> MCP -> Add server: npx -y sub-bridge

Log in with ChatGPT or Claude

Open your local URL to log in.

Set custom OpenAI API Key / Base URL in Cursor

Copy the token from the local UI and paste it in Cursor.

Your subscription tokens now work in Cursor when you use OpenAI models.

How it works

Sub Bridge is a stdio MCP server that runs a local OpenAI API proxy. You setup custom OpenAI API Key / Base URL in Cursor and use your OAuth token from Claude Code or Codex to access your subscription tokens.

Cursor

→

Sub Bridge MCP server

→

Local OpenAI API proxy

→

OpenAI / Claude API

Your OAuth token stays local. The tunnel only forwards requests to your machine.

FAQ

Yes. Sub Bridge is fully open-source and local. When you login with ChatGPT and Claude, your tokens live in your browser local storage.
The only gotcha is that cursor requires a public url to connect so you can setup tunnels through Cloudflare, Ngrok, Tailscale for Cursor to connect your local port.
The exposed API doesn't expose your tokens to the internet as the MCP server doesn't store your credentials anywhere.

Autocomplete still needs a Cursor plan. Chat, agents, and tools work.

Sub Bridge is fully open-source and local so this approach is same as using Adblockers. The open-source agents such as Opencode already uses this approach, Sub Bridge only exposes it as an MCP server.

Install the MCP server, then connect your subscription.

Follow the setup steps above to connect ChatGPT or Claude.