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

Q: How does Windsurf manage message payloads for a Google Pub/Sub Topic?

You pass a plain string message to the pubsubpublishmessage tool. The payload is sent directly to the configured Google Pub/Sub Topic in the format your downstream services expect. You don't need to worry about JSON formatting within Windsurf.

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Connect Google Pub/Sub Topic MCP to Windsurf

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Setup Google Pub/Sub Topic with Windsurf

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Automated Event Signaling

When you need your agent to signal a state change across multiple services, use `pubsub_publish_message`. This tool sends a specific payload directly to the designated Google Pub/Sub Topic. Cascade can read context and build out complex sequences. For example, after pulling user data from an API, Windsurf publishes a confirmation message that triggers subsequent billing or logging microservices.

Decouple Microservice Steps

Don't run everything in one massive function call. Use this MCP to hand off work between services via the Google Pub/Sub Topic. It ensures that Service A doesn't need to know where Service B lives; it just needs to publish a message. This setup is perfect for complex workflows. Windsurf can execute the initial steps and then signal completion, allowing other autonomous processes to pick up the slack reliably.

Trigger Asynchronous Actions

If an action doesn't need an immediate response—like generating a report or updating a cache—you publish it. The `pubsub_publish_message` tool handles this by sending the message to the Google Pub/Sub Topic. This keeps your overall agent execution fast and responsive. You initiate the event, Windsurf moves on, and the downstream system handles the work at its own pace.

Setup guide

Set up Google Pub/Sub Topic MCP in Windsurf

Prerequisites

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

1

Open MCP configuration

Click the Cascade assistant icon in the sidebar, then click the hammer icon (🔨) at the top of the panel. Select "Configure" to open ~/.codeium/windsurf/mcp_config.json.
2

Add the Google Pub/Sub Topic MCP

Paste the JSON snippet shown on the right into the mcpServers object. Replace [YOUR_TOKEN_HERE] with your endpoint token from cloud.vinkius.com.
3

Refresh MCPs

Go back to the hammer icon (🔨) in Cascade and click "Refresh". Windsurf will detect the new server. No full restart is needed — the connection is hot-reloaded.
4

Verify in Cascade

Start a new Cascade conversation and ask something like "Show my Google Pub/Sub Topic payment history." If connected, Cascade will call the Google Pub/Sub Topic tools directly. You will see a green dot next to the server name in the MCP panel.

mcp_config.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 Windsurf

You pass a plain string message to the `pubsub_publish_message` tool. The payload is sent directly to the configured Google Pub/Sub Topic in the format your downstream services expect. You don't need to worry about JSON formatting within Windsurf.

While Windsurf doesn't run cron jobs itself, you can chain actions to trigger the message. You could build an agent that runs on a schedule and uses `pubsub_publish_message` to signal that event occurrence.

Yes, the underlying platform needs credentials scoped specifically to publish messages. When connecting your AI client, ensure the necessary service account permissions are granted for publishing to that particular topic.

The tool call will fail immediately and surface an error. Cascade reads this failure state and allows you to debug the exact payload or the connectivity issue that caused the publishing attempt to halt.

This MCP handles message content. It sends plain string data, which serves as the event trigger payload for your downstream systems connected to the Google Pub/Sub Topic.

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