How to Use the Lob MCP in AutoGen

Q: How do I register the Lob MCP Server tools with AutoGen?

Install autogen-extmcp and use the mcpservertools helper with your Vinkius server URL. Pass the resulting tool list to your AssistantAgent constructor to give it mailing capabilities.

Q: How do AutoGen agents coordinate to list and verify Lob bank accounts?

A billing agent calls listbankaccounts to find the correct account ID. It then passes this ID to a manager agent, who verifies the account type before authorizing the check tool.

Q: Can agents handle complex postcard layouts using these tools?

Yes, an agent can call createpostcard with custom front and back designs. The framework allows multiple specialized agents to collaborate on the image URLs and message text before sending.

Build multi-agent AutoGen workflows that debate billing disputes and trigger physical checks or letters via the Lob MCP Server.

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Setup Lob with AutoGen

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Approve physical checks through AutoGen agent debates

The `create_check` tool prints and mails physical checks using your configured Lob bank account. In AutoGen, a financial agent can propose a check, while a compliance agent reviews the transaction details before giving approval. This debate ensures that you don't print a Lob check without full consensus. If the AutoGen compliance agent flags the amount or the recipient name, the draft is rejected before the tool is executed.

Verify addresses via consensus using this MCP Server

The `verify_us_address` tool standardizes delivery locations to ensure they are mailable before AutoGen triggers a run. An AutoGen data agent can run this verification, while a separate customer service agent decides how to handle any returned errors. If `autocomplete_us_address` fails to find a match, the AutoGen agents debate whether to prompt the user for input or try a fallback address. That's how you prevent automated Lob mail runs from failing due to bad address data.

Design and dispatch letters using AutoGen agents

The `create_letter` tool generates physical mail using HTML templates and merge variables inside your AutoGen workflow. One AutoGen agent can draft the letter's text, while a design agent reviews the HTML template retrieved via `get_template`. Once both AutoGen agents agree the content looks professional, they trigger the Lob mail run. This workflow ensures every physical letter sent to a customer meets your brand standards.

Setup guide

Set up Lob MCP in AutoGen

Prerequisites

Python 3.10+ installed
autogen-ext[mcp] package
Active Vinkius subscription with a valid endpoint token

1

Install AutoGen with MCP
Run pip install "autogen-ext[mcp]" autogen-agentchat. The MCP extension includes mcp_server_tools for stateless tool access.
2

Fetch tools from the MCP
Call mcp_server_tools(SseServerParams(url=...)) with your Vinkius endpoint. Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com.
3

Run your agent
Pass the tools to AssistantAgent and call agent.run(). The agent invokes Lob tools and returns structured results.

agent.py

from autogen_ext.tools.mcp import SseServerParams, mcp_server_tools
from autogen_agentchat.agents import AssistantAgent
from autogen_ext.models.openai import OpenAIChatCompletionClient

server_params = SseServerParams(
    url="https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
)

tools = await mcp_server_tools(server_params)

agent = AssistantAgent(
    name="Lob_assistant",
    model_client=OpenAIChatCompletionClient(model="gpt-4o"),
    tools=tools,
)

result = await agent.run("List recent Lob data")
print(result.messages[-1].content)

Get your connection token →

Prerequisites

Python 3.10+ installed
autogen-ext[mcp] + autogen-agentchat
Active Vinkius subscription with a valid endpoint token

1

Install dependencies
Same packages as above. McpWorkbench is ideal when your agent needs stateful sessions across multiple tool calls.
2

Use McpWorkbench as context manager
Wrap your agent in async with McpWorkbench(...) to maintain shared state and resources. The workbench manages the full MCP session lifecycle.
3

Run with workbench
Pass workbench=workbench to your agent. State is preserved across multiple tool calls within the same session.

agent.py

from autogen_ext.tools.mcp import McpWorkbench, SseServerParams
from autogen_agentchat.agents import AssistantAgent
from autogen_ext.models.openai import OpenAIChatCompletionClient

server_params = SseServerParams(
    url="https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
)

async with McpWorkbench(server_params) as workbench:
    agent = AssistantAgent(
        name="Lob_assistant",
        model_client=OpenAIChatCompletionClient(model="gpt-4o"),
        workbench=workbench,
    )

    result = await agent.run("List recent Lob data")
    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 Lob. 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 Lob MCP in AutoGen

Install autogen-ext[mcp] and use the mcp_server_tools helper with your Vinkius server URL. Pass the resulting tool list to your AssistantAgent constructor to give it mailing capabilities.

Yes, if the agents debate a sent letter and decide to revoke it, they can call cancel_letter. This tool only works if the letter's status is still processing in your queue.

A billing agent calls list_bank_accounts to find the correct account ID. It then passes this ID to a manager agent, who verifies the account type before authorizing the check tool.

Yes, an agent can call create_postcard with custom front and back designs. The framework allows multiple specialized agents to collaborate on the image URLs and message text before sending.

Your bank account numbers and signatory details are protected by Vinkius's ephemeral, zero-trust infrastructure. AutoGen agents only interact with the tool schemas, and actual API credentials never enter the agent conversation logs.

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