How to Use the Convex MCP in Cursor

Q: How does Cursor use Convex schema types to write better code?

When you run runquery in Cursor, the agent inspects the returned JSON payload. It uses this live schema shape to write typed TypeScript code, matching your actual database state instead of guessing.

Q: Can I run Convex mutations safely during a Cursor debugging session?

Yes. The runmutation tool uses your existing backend validation. If your Cursor agent attempts an invalid write, the Convex database rejects it, and the error is piped back to your editor.

Q: Does the MCP Server log the Convex JSON payloads passing through Cursor?

No. All database records and JSON payloads fetched via runquery or sent via runmutation are processed in memory within secure, isolated sandboxes. No transactional data is ever written to disk or stored by Vinkius.

Feed live Convex database state directly into your Cursor agent to write code that perfectly matches your schema.

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Connect Convex MCP to Cursor

Create your Vinkius account to connect Convex to Cursor and route execution through our secure gateway. The platform manages server hosting, runtime updates, and security layers. Configuration requires no manual server provisioning.

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Setup Convex with Cursor

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Inject live data into Cursor with this MCP Server

The `run_query` tool pulls real-time JSON payloads from your Convex database directly into your Cursor editor. Instead of writing code against mock objects or outdated schemas, your agent inspects the actual data structure in your backend. This ensures the frontend code it generates matches your database exactly. You can ask the Cursor agent to write a new UI component, and it will fetch the live data structure first. It writes the React code using the exact fields returned by your query, saving you from manual schema checking.

Test backend functions inside Cursor Agent mode

You can execute any backend logic using the `run_function` tool directly inside your Cursor chat or inline terminal. This lets you verify how your endpoints behave with different arguments before you commit to writing frontend integration code. If you are debugging a tricky edge case, you can tell the agent to run the function with specific parameters. The agent reads the raw response, diagnoses the failure, and proposes the exact fix in your local files.

Modify database state without leaving Cursor

The `run_mutation` tool lets your agent update your database tables directly from the Cursor composer interface using this MCP Server. When you are testing a new feature and need to reset a user's status or clear a test list, you don't need to open a browser. You can also trigger side-effect heavy operations using the `run_action` tool. This allows you to test your entire stack, from frontend UI changes to background jobs, all while staying focused on your active code files.

Setup guide

Set up Convex MCP in Cursor

Prerequisites

Cursor installed (macOS, Windows, or Linux)
Active Vinkius subscription with a valid endpoint token

1

Open MCP Settings

Go to Cursor Settings → MCP or open the Command Palette (Cmd+Shift+P / Ctrl+Shift+P) and search for "MCP: Add Server".
2

Add the Convex MCP

Cursor will create or open .cursor/mcp.json in your project root. Paste the JSON snippet on the right. Replace [YOUR_TOKEN_HERE] with your endpoint token from cloud.vinkius.com.
3

Enable Agent mode

Open Composer (Cmd+I / Ctrl+I) and switch to Agent mode using the dropdown at the top. MCP tools are only available in Agent mode.
4

Verify the connection

Ask Cursor something like "List my recent Convex transactions." If the MCP tools are loaded correctly, Cursor will call the Convex tools automatically. You can also check Settings → MCP for a green status indicator.

.cursor/mcp.json

{
  "mcpServers": {
    "convex-mcp": {
      "url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    }
  }
}

Get your connection token →

Independent Platform Disclaimer: Vinkius is an independent platform and is not affiliated with, endorsed by, sponsored by, verified by, or otherwise authorized by Convex. All third-party trademarks, logos, and brand names are the property of their respective owners. Their use on this website is strictly for informational purposes to identify service compatibility and interoperability.

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Common questions about Convex MCP in Cursor

When you run `run_query` in Cursor, the agent inspects the returned JSON payload. It uses this live schema shape to write typed TypeScript code, matching your actual database state instead of guessing.

Yes. The `run_mutation` tool uses your existing backend validation. If your Cursor agent attempts an invalid write, the Convex database rejects it, and the error is piped back to your editor.

Yes. Cursor connects to the Vinkius managed MCP server using a single endpoint token. Your actual database credentials are never exposed to the agent or saved in your local workspace files.

Yes. If your local environment is configured, you can target your local dev deployment. The MCP tools route the calls to the active instance configured in your environment.

No. All database records and JSON payloads fetched via `run_query` or sent via `run_mutation` are processed in memory within secure, isolated sandboxes. No transactional data is ever written to disk or stored by Vinkius.

Use it with your favorite AI tools

Connect this server to Cursor, Claude, VS Code, and more.

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