Using Polydev with Cursor

Polydev is a tool Cursor calls, not a replacement for its model. Cursor keeps its own model and sign-in, and calls Polydev only when you name another model. The answer comes back in the chat and says what paid for it. The hosted link has four tools:

ask_model

Sends a prompt to one model, or several, and returns each answer with what paid for it. The older name get_perspectives still works.

list_models

The models you can reach right now, and what pays for each.

search_x

Recent public posts on X. Read-only, and it needs your own xAI API key.

rank_perspectives

Ranks the answers, best first, when you ask. Rankings feed the public leaderboard as counts.

Nothing to install and no keys in config files.

1. 01

   Add the link

   Add to Cursor

   The button opens Cursor. Or add this to ~/.cursor/mcp.json:

   ~/.cursor/mcp.jsonCopy

   {
     "mcpServers": {
       "polydev": {
         "url": "https://polydev.ai/mcp"
       }
     }
   }

2. 02

   Connect and sign in

   In Cursor's MCP settings, choose Connect next to Polydev. Your browser opens the Polydev sign-in; approve access.

The hosted link is all most people need. The local client is the npm package polydev-ai (version 1.12.0, Node.js 20 or newer, open source under Apache-2.0). It runs on your machine and adds three things: image models, your ChatGPT plan, and the Claude Code and Codex you are already signed in to.

It can run your own Claude Code and Codex under your own login, only on your machine. It never runs the CLI of the app that called it.

Add this to ~/.cursor/mcp.json:

{
  "mcpServers": {
    "polydev-local": {
      "command": "npx",
      "args": ["-y", "polydev-ai@latest"]
    }
  }
}

The first call opens your browser to sign in to Polydev (or ask Cursor to run login). If you keep both the hosted link and the local client, give them different names, as above.

On top of the hosted tools, the local client has:

generate_image

Makes an image with an OpenAI or Google model, such as GPT Image or Nano Banana. Uses your key, or one free request.

connect_chatgpt_plan

Continue with ChatGPT: sign in once in the browser and GPT requests use your ChatGPT Plus or Pro plan.

chatgpt_plan_status

Shows whether your ChatGPT plan is connected.

login

Signs in to Polydev in the browser and saves the token on this machine.

get_auth_status

Shows the connection, the Claude Code and Codex it found, and your configured models.

To have GPT requests use your ChatGPT Plus or Pro plan, ask your app to run connect_chatgpt_plan, or sign in from a terminal:

npx -y polydev-ai chatgpt login     # Continue with ChatGPT in the browser
npx -y polydev-ai chatgpt status    # is plan usage on?
npx -y polydev-ai chatgpt models    # models your plan can use
npx -y polydev-ai chatgpt logout    # sign out and delete the tokens

Continue with ChatGPT works in the local client only for now. On the hosted link it is waiting for OpenAI's approval.

Ask in plain words and name the model, or mention Polydev. Cursor calls Polydev when you ask, or may offer to; it does not call it on its own.

• Check a fix

  “Have GPT check whether this useEffect fix is right.”

• Compare two answers

  “Ask Claude and Gemini how to structure state in this React app, then tell me where they disagree.”

• Security check

  “Ask Grok to look for injection and session problems in this login handler.”

• Make an image (local client)

  “Make a 1200×630 cover for this post with Nano Banana.”

Which models you can reach depends on what you set up in your dashboard. Ask for list_models to see them.

Polydev is free: there are no plans, tiers or credits to buy. Each request uses the first of these you have set up, and every answer ends with what paid for it, for example Paid by: your API key.

Your ChatGPT plan

Local client. GPT requests count toward your Plus or Pro plan, with a weekly cap you set in ChatGPT.

Your Claude Code or Codex

Local client. Runs the Claude Code or Codex you are signed in to on this machine.

Your API keys

OpenAI, Anthropic, Google, xAI or OpenRouter, added in your dashboard. The provider bills you directly.

10 free requests

On Polydev, up to $1 in total. No card.

Polydev is listed but has no tools

Open Cursor's MCP settings and choose Connect next to Polydev to sign in. If it still shows an error, toggle it off and on, or restart Cursor.

The chat does not use Polydev

Use the chat in Agent mode, where Cursor can call MCP tools, and mention Polydev in your request.

Edited mcp.json but nothing changed

Check that the JSON is valid and uses url, then restart Cursor.

A model is missing, or the free requests ran out

Add your own API keys or an OpenRouter key in your dashboard, or use the local client with your ChatGPT plan or the Claude Code and Codex you are signed in to. Ask for list_models to see what you can reach and what pays for each.

Want to disconnect

Remove the server from Cursor, and revoke access under Dashboard → Connected apps.