How to Use the Google Pub/Sub Topic MCP in Cursor

Q: How does Cursor handle Google Pub/Sub Topic setup?

You add the server definition to the .cursor/mcp.json file in your project root. This makes it available for all agents working on that codebase.

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Setup Google Pub/Sub Topic with Cursor

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Publish messages to Google Pub/Sub Topic

The `pubsub_publish_message` tool lets your agent publish a message directly from within your code. This means when the AI suggests calling this function, it’s going to use real API responses, not mock data. This is perfect for mid-flow development where you need the live result of sending an event to validate subsequent code blocks.

Injecting live Pub/Sub data into code

When your agent calls this MCP, it brings back real context from the Google Pub/Sub Topic. You'll see that live data injected directly where you're typing. It works right inside your editor. This feature saves time because you don’t have to switch contexts or run local scripts just to test API responses.

Project-scoped MCP configuration

You set up the tool using a `.cursor/mcp.json` file in your project root. This lets the entire team access this functionality without global setup, keeping the tools tied to the specific service. The agent mode uses this scoped definition so that when it calls `pubsub_publish_message`, everyone on the team knows exactly what's being accessed.

Setup guide

Set up Google Pub/Sub Topic 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 Google Pub/Sub Topic 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 Google Pub/Sub Topic transactions." If the MCP tools are loaded correctly, Cursor will call the Google Pub/Sub Topic tools automatically. You can also check Settings → MCP for a green status indicator.

.cursor/mcp.json

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

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Independent Platform Disclaimer: Vinkius is an independent platform and is not affiliated with, endorsed by, sponsored by, verified by, or otherwise authorized by Google Pub/Sub Topic. 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 Google Pub/Sub Topic MCP in Cursor

You add the server definition to the `.cursor/mcp.json` file in your project root. This makes it available for all agents working on that codebase.

Yes, absolutely. When you enable Agent mode, the AI sees this tool and can write code that calls `pubsub_publish_message` using real-time context.

The tool handles message payloads, which you'll treat as strings within your code. Your agent will manage the necessary serialization and ensure the payload matches the required format for the topic.

Yes. All tool calls are managed by Vinkius, which uses a zero-trust proxy for credentials. Your keys never sit on disk; they're only used when the call is in transit.

This MCP deals exclusively with message payloads intended for a topic. The data type you'll be working with is the message content itself, which can be structured as strings.

Use it with your favorite AI tools

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