How to connect Openai to Cursor

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How to integrate Openai MCP with Cursor

Cursor is one of the leading AI-powered code editors. It is built to help developers write, understand, and refactor code faster with AI assistance built directly into the editor.

And in this guide, I will explain the easiest and most secure way to connect your Openai account to Cursor via Composio Connect, so it can list all available OpenAI models, upload a file for fine-tuning, create a new assistant with GPT-4, and more without ever putting your account credentials at risk.

Also integrate Openai with

Why Composio?

  • 1,000+ SaaS toolkits out of the box. Skip the work of building and maintaining integrations, Composio gives you instant access to a vast catalog of pre-built connectors.
  • One MCP server for every app. Connect any of your applications on demand through a single endpoint, rather than juggling a separate server for each app.
  • Smart, context-aware tool loading. Unlike traditional MCP servers that dump every available tool into the LLM context window, Composio searches for and loads only the tools relevant to the task at hand. A remote CLI workbench lets LLMs compose these tools into workflows for complex automation.

Connect Openai to Cursor

Two ways to install — pick whichever you prefer.

1. Install with one click

Click the button below to add Composio to Cursor.

↗Install in Cursor

2. Or add manually

Add to your Cursor mcp.json

Open .cursor/mcp.json in your project root (or ~/.cursor/mcp.json for global config) and add the following configuration:

bash
{
  "servers": {
    "composio": {
      "type": "http",
      "url": "https://connect.composio.dev/mcp"
    }
  }
}

3. Authorize

Restart Cursor, then click "Connect" next to Composio in MCP Tools settings.

Cursor MCP Tools settings with Connect button next to Composio

A browser window will open to authorize.

Composio authorization browser window

Connect your Openai account

Back in Cursor, ask the agent to connect to Openai or give it any Openai-related task.

For example, ask it to:

  • "List all available OpenAI models"
  • "Upload a file for fine-tuning"
  • "Create a new assistant with GPT-4"

It will prompt you to authenticate and authorize access to Openai.

That is it. Composio tools are now available in Cursor, and your Openai account is ready to use.

Supported Tools & Triggers

Tools
Create AssistantTool to create a new assistant with specified parameters.
Create MessageTool to create a new message in a specific thread.
Create ThreadTool to create a new thread.
Delete assistantTool to delete a specific assistant by its id.
Delete fileTool to delete a file.
List filesTool to retrieve a list of files.
List fine-tunesTool to list your organization's fine-tuning jobs.
List modelsTool to list available models.
List run stepsTool to retrieve all steps of a specific run.
Modify threadTool to modify an existing thread's metadata.
Retrieve assistantTool to retrieve details of a specific assistant.
Retrieve modelTool to retrieve details of a specific model.
Retrieve threadTool to retrieve details of a specific thread by its id.
Upload fileTool to upload a file for use across openai endpoints.

Conclusion

You have successfully connected Openai to Cursor using Composio Connect. Your agent can now use Openai securely without exposing credentials in prompts or local scripts.

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FAQ

What are the differences in Tool Router MCP and Openai MCP?

With a standalone Openai MCP server, the agents and LLMs can only access a fixed set of Openai tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Openai and many other apps based on the task at hand, all through a single MCP endpoint.

Can I use Tool Router MCP with Cursor?

Yes, you can. Cursor fully supports MCP integration. You get structured tool calling, message history handling, and model orchestration while Tool Router takes care of discovering and serving the right Openai tools.

Can I manage the permissions and scopes for Openai while using Tool Router?

Yes, absolutely. You can configure which Openai scopes and actions are allowed when connecting your account to Composio. You can also bring your own OAuth credentials or API configuration so you keep full control over what the agent can do.

How safe is my data with Composio Tool Router?

All sensitive data such as tokens, keys, and configuration is fully encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant and follows strict security practices so your Openai data and credentials are handled as safely as possible.

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