How to Use the Google Pub/Sub Topic MCP in Claude Code

Q: How do I format messages for a Google Pub/Sub Topic when running scripts with Claude Code?

You pass the message directly as an argument to pubsubpublishmessage. Since you're in the terminal, keep it simple: use plain strings that contain the necessary context identifiers. The agent handles the wrapping.

Q: Can I use Claude Code and this MCP in a multi-stage pipeline with a Google Pub/Sub Topic?

Absolutely. You run one stage that executes pubsubpublishmessage to signal the event, and the subsequent stages (the subscribers) pick up the payload automatically. It's built for pipelines.

Run headless, automated cloud signaling using Claude Code in the terminal.

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Setup Google Pub/Sub Topic with Claude Code

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CI/CD Event Signaling

In a GitHub Action or Docker container, you can't rely on manual steps. Use `pubsub_publish_message` to ensure your build process signals completion by publishing an event to the Google Pub/Sub Topic. This is perfect for creating reliable deployment pipelines where one step must trigger the next without human intervention. The output is clean and pipe-friendly.

Automated Job Orchestration

When scripting complex infrastructure tasks, you need to hand off ownership of work between scripts. `pubsub_publish_message` allows your shell script to drop a message onto the Google Pub/Sub Topic, activating an asynchronous worker process. Your terminal session runs this tool as part of a larger automation flow, ensuring that system state changes are logged and auditable.

Background Service Health Check

Write a simple cron job to verify service health. Instead of checking an HTTP endpoint, have the script use this MCP to publish a heartbeat message to the Google Pub/Sub Topic. This makes your monitoring easier to automate. The terminal output confirms the successful execution and publishing attempt for compliance logging.

Setup guide

Set up Google Pub/Sub Topic MCP in Claude Code

Prerequisites

Claude Code CLI installed (npm install -g @anthropic-ai/claude-code)
Active Vinkius subscription with a valid endpoint token

1

Run the add command

Open your terminal and run the command shown on the right. Replace [YOUR_TOKEN_HERE] with your endpoint token from cloud.vinkius.com. Use --scope user to make it available across all projects.
2

Verify the connection

Start a Claude Code session and type /mcp to list connected servers. You should see google-pubsub-topic-mcp with a green status indicator.
3

Start using tools

Ask Claude Code something like "Check my latest Google Pub/Sub Topic transactions." It will automatically discover and invoke the available Google Pub/Sub Topic tools.

Terminal

claude mcp add --transport http google-pubsub-topic-mcp https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp

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Prerequisites

Claude Code CLI installed
Active Vinkius subscription with a valid endpoint token

1

Open the config file

Create or edit .mcp.json in your project root for project-level scope, or ~/.claude.json for user-level scope.
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

Restart Claude Code

Start a new Claude Code session. Type /mcp to confirm the server is connected. The tools will be automatically available in your conversation.

.mcp.json

{
  "mcpServers": {
    "google-pubsub-topic-mcp": {
      "type": "url",
      "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 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 Claude Code

You pass the message directly as an argument to `pubsub_publish_message`. Since you're in the terminal, keep it simple: use plain strings that contain the necessary context identifiers. The agent handles the wrapping.

No. You just need to ensure your environment variables or service account credentials accessible by the container are scoped with publishing permissions to the target topic. The command line execution is straightforward.

The tool outputs standard error codes directly to your terminal stream. This allows you to immediately see if the failure was due to permissions, topic non-existence, or payload validation issues.

It handles string content for event messages. This is ideal for passing structured identifiers or simple status updates between headless services connected to the Google Pub/Sub Topic.

Absolutely. You run one stage that executes `pubsub_publish_message` to signal the event, and the subsequent stages (the subscribers) pick up the payload automatically. It's built for pipelines.

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