Apps that run on your Cursor plan: CLI workspaces and design tools

T3 Code and Munder Difflin advertise support for running Cursor agents from another workspace. Brilliant offers a different route: connect your external Cursor agent to its design canvas through MCP. None of these arrangements turns a Cursor subscription into a general-purpose API key or adds a new model allowance.

Checked 8 November 2026 against maker documentation and published directory records. This is a documentation-based shortlist, not an installation test. Start with the Cursor-compatible directory, then choose the interface you need.

Which apps can use the Cursor agent you already have?

App	Documented connection	Useful when you want
T3 Code	Cursor alongside other coding agents in one control surface	One place to manage work across several runtimes
Munder Difflin	Cursor as a terminal agent in a multi-agent workspace	A desktop workspace organized around several agents
Brilliant	Your external Cursor agent calls the canvas through MCP	Editable design work driven from your existing agent

These are not interchangeable connections. The first two organize agents; the third gives an agent a tool. Make that distinction before comparing features or assuming that a sign-in button imports an entire subscription.

T3 Code’s homepage names Cursor among the agents it orchestrates and describes a bring-your-own-subscription model. Munder Difflin’s homepage lists Cursor among its terminal agents. Those are maker support statements, not our certification of every version or account tier. Check the installed release before moving an important project.

How should you connect Cursor before adding a workspace?

Establish a working Cursor session first. Cursor’s CLI authentication reference documents agent login for browser sign-in and agent status for checking authentication, account information and the endpoint. Sign in on Cursor’s own page rather than handing a wrapper your password.

Then open the chosen workspace and select its Cursor integration. Use a disposable project for the first assignment. A suitable acceptance task is to explain one file without editing it, then show a proposed change for review. This is a suggested test, not a result we measured.

Record the runtime, account and selected model before starting. If the wrapper fails while the CLI works on the same host, preserve that distinction in a bug report. If both fail, solve the underlying login or account issue before changing workspace settings.

For terminal-only work, you may not need another app. Cursor CLI already provides an interactive interface and an Ask mode for read-only exploration. Add a workspace because its organization helps you, not because another layer is required to leave the editor.

How does Brilliant use Cursor without importing your subscription?

Brilliant’s agent guide separates the built-in chat from an external agent connected over MCP. With the external route, Cursor remains the agent and Brilliant supplies canvas tools. Its setup table lists a Cursor toggle, while the app’s MCP Connections settings are the current connection list.

Connect the agent through those settings and begin on a throwaway canvas. Ask it to inspect the canvas, propose a small change and stop for review. Verify that the result remains editable before using the workflow for a client deliverable.

Do not read Brilliant’s unlimited external-MCP language as unlimited Cursor inference. The guide also identifies an exception for images generated using Brilliant AI, which draw on Brilliant AI usage. Keep image generation and ordinary canvas edits separate when checking charges.

The connection itself also says nothing about where Cursor sends model requests. Local canvas tooling is not a promise that cloud-model inference stays on your machine. Review both products’ data controls for sensitive designs.

Which usage pool and charges should you check?

Cursor’s current pricing documentation distinguishes new X Subscription plans from legacy Cursor plans. The new plans share a weekly Cursor-model pool across supported surfaces, including the CLI and Grok apps. Third-party models are separately funded where available. Legacy plans retain a different monthly-pool and on-demand arrangement.

That is why an old Pro tutorial or another person’s reset schedule may not describe your account. Check the actual plan and selected model, then note the remaining balance before a small task. Do not buy an upgrade on the assumption that every model draws from the included pool.

Check the workspace’s own paid features too. Reusing model access does not establish that every app feature is free. This page deliberately avoids a fixed monthly-price comparison because the relevant question is which account funds each operation, not just which subscription names appear on the screen.

Before parallel work, decide who can start agents, which projects they can edit and when they must stop. Keep deployment and external messaging out of the first test. A wrapper is not a reason to grant every agent production access.

Can you use the same Cursor plan in any other harness?

Do not infer compatibility from a familiar model picker or an API-key field. This shortlist is limited to the documented integrations above. A tool exposing a Cursor-related option still needs its own supported authentication path and account eligibility checks.

The reverse question has a separate answer: using ChatGPT inside the Cursor editor concerns a different runtime and paying account. Agent isolation and review are separate concerns from exporting Cursor allowance.

Choose by the missing capability. Use the CLI for terminal work, a control surface for agent organization, or MCP for access to a design canvas. Keep the provider sign-in visible and the first task small enough that you can inspect both the output and the usage afterward.