How to Use the Smarty MCP in LangChain

Q: Can Smarty handle US addresses within LangChain?

Absolutely. You call validateusaddress, and your agent gets back the DPV status and precise coordinates right away. It's a reliable step in any multi-step reasoning process.

Q: Does Smarty support international addressing in LangChain?

Yes. The autocompleteintladdress tool handles global addresses, making sure your multi-server MCP client can manage diverse country formats without breaking the chain.

Build complex, multi-step data flows for LangChain.

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…and any MCP-compatible client

MCP Servers — Included with Plan

Connect Smarty MCP to LangChain

Create your Vinkius account to connect Smarty to LangChain — we handle the hosting, security, and runtime updates so you don't have to. No server setup required.

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Setup Smarty with LangChain

Ask AI about this MCP

ChatGPT

Claude

Perplexity Vinkius runs on Gemini

Gemini

Grok

Sequential Address Processing

Need to clean up messy text before validation? Use `extract_addresses` to pull out all potential physical addresses. Then, you can pipe those results into a specific validator like `validate_us_address`. This lets your agent first identify the data and then pass it off for DPV status checks.

US vs. International Routing

Your agent needs to know which tool to call? Use a routing step based on input patterns. First, call `autocomplete_us_address` if the input looks like a US address. If it's international, run `autocomplete_intl_address`. The output of that autocomplete becomes the input for the specific validation tool.

Data Integrity Checks

Before committing data, check everything. An agent can first use `get_account_info` to confirm user permissions. After that, it runs `verify_zip_code` on a given zip code just to make sure the associated city and state haven't changed. It’s simple multi-step verification.

Setup guide

Set up Smarty 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 Smarty 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({
    "smarty-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 Smarty transactions"
    })
    print(result["messages"][-1].content)

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Common questions about Smarty MCP in LangChain

Smarty lets your agent treat address validation as just another step in the chain. Instead of failing because an address is bad, the pipeline simply passes the failure status down the line for review.

Absolutely. You call `validate_us_address`, and your agent gets back the DPV status and precise coordinates right away. It's a reliable step in any multi-step reasoning process.

Smarty provides structured location intelligence, including verified address components (street, city, state) and geocoded coordinates. This keeps your chains running on clean, actionable data.

Yes. The `autocomplete_intl_address` tool handles global addresses, making sure your multi-server MCP client can manage diverse country formats without breaking the chain.

The server touches physical address data (US and International). All interactions follow zero-trust protocols managed by Vinkius. Your session context remains secure throughout the chain.

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