How to Use the Google Pub/Sub Subscription MCP in LangChain

Connect Google Pub/Sub Subscription to your LangChain agents for event-driven pipelines that process messages in real-time.

See Vinkius in Action

Works with every AI agent you already use

…and any MCP-compatible client

MCP Servers - Free for Subscribers

Connect Google Pub/Sub Subscription MCP to LangChain

Create your Vinkius account to connect Google Pub/Sub Subscription to LangChain and route execution through our secure gateway. The platform manages server hosting, runtime updates, and security layers. Configuration requires no manual server provisioning.

GDPR Free for Subscribers

Setup Google Pub/Sub Subscription with LangChain

Ask AI about this MCP

ChatGPT

Claude

Perplexity

Trigger LangChain agents with live message data

Use `pull_messages` to fetch raw payloads directly from your queue. Your agent receives the data as a structured input, ready for immediate transformation or analysis within your chain. This setup keeps your logic focused on the task. Once the agent processes the event, it triggers the necessary downstream operations without manual intervention.

Automate message lifecycle management

Call `acknowledge_messages` to finalize the transaction once the agent finishes its work. This removes the message from the Google Pub/Sub Subscription and prevents redundant processing cycles. Your pipeline maintains state integrity through this clear hand-off. It ensures that every item is handled exactly once before it is cleared from the source.

Build robust MCP Server orchestration

Integrate this MCP Server into your LangGraph workflows to manage high-volume streams. The agent decides when to pull based on current system load or specific environmental triggers. This approach allows you to chain multiple tools together. You can route message content into other databases or vector stores within the same execution flow.

Setup guide

Set up Google Pub/Sub Subscription MCP in LangChain

Prerequisites

Python 3.10+ installed
langchain-mcp-adapters + langgraph packages
Active Vinkius subscription with a valid endpoint token

1

Install dependencies
Run pip install langchain-mcp-adapters langgraph langchain-openai. The MCP adapters package converts MCP tools into native LangChain BaseTool objects.
2

Connect via HTTP transport
Use MultiServerMCPClient with "transport": "http" pointing to your Vinkius endpoint. Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com.
3

Create a ReAct agent
Pass the discovered tools to create_react_agent() from LangGraph. The agent automatically routes Google Pub/Sub Subscription tool calls through the MCP protocol.
4

Run with any LLM
Swap ChatOpenAI for ChatAnthropic, ChatGoogleGenerativeAI, or any LangChain-compatible model. The MCP tools work identically across all providers.

agent.py

from langchain_mcp_adapters.client import MultiServerMCPClient
from langgraph.prebuilt import create_react_agent
from langchain_openai import ChatOpenAI

async with MultiServerMCPClient({
    "google-pubsub-subscription-mcp": {
        "transport": "http",
        "url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp",
    }
}) as client:
    tools = client.get_tools()

    agent = create_react_agent(
        ChatOpenAI(model="gpt-4o"),
        tools,
    )
    result = await agent.ainvoke({
        "messages": "List recent Google Pub/Sub Subscription transactions"
    })
    print(result["messages"][-1].content)

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 Subscription. 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.

Why Choose Vinkius

Vinkius connects your tools to AI with real-time monitoring and automatic cost savings — all from one dashboard.

Connect Google Pub/Sub Subscription now

Real-time monitoring

Live

visibility into every interaction

Connect your favorite tools to your AI and see exactly what's happening — every request, every response, in real time.

Built-in savings

60%

lower AI costs

Vinkius compresses data between your apps and your AI automatically. Lower bills every month — no configuration required.

Single dashboard

One

place for every integration

Every tool your AI connects to, managed from a single screen. One account, complete control.

Common questions about Google Pub/Sub Subscription MCP in LangChain

Install the necessary MCP adapters and define the server endpoint in your configuration. Once connected, pass the tools to your agent to begin pulling and acknowledging messages.

Yes, provided you manage your agent's polling interval correctly. You control the rate of execution, ensuring your pipeline keeps up with incoming message volume.

The server remains stateless, but you can persist message context using LangChain's memory components. This allows your agent to reference previous message batches during ongoing sessions.

The message remains in the queue because you haven't called `acknowledge_messages` yet. It will become available for redelivery once the visibility timeout expires.

Your messages are handled strictly within the memory of your local agent process. The MCP protocol ensures that only authorized clients can access the subscription data via your endpoint token.

Use it with your favorite AI tools

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

OpenAI Agents SDK sdk-python

Google ADK sdk-python

Pydantic AI sdk-python

Vercel AI SDK sdk-typescript