How to Use the Toket MCP in LangChain

Q: Can I check gas status when building chains with LangChain?

Yep. The getgastankstatus tool checks your balance before you run a minting action. This prevents the agent from failing halfway through because of insufficient funds, saving you time and money.

Q: How does the MCP Server integrate into my multi-server LangChain setup?

You use the MultiServerMCPClient to manage connections, letting your single LangChain application talk to Toket and other sources. It keeps everything in one place while maintaining tool isolation.

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Connect Toket MCP to LangChain

Create your Vinkius account to connect Toket 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.

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Setup Toket with LangChain

Ask AI about this MCP

ChatGPT

Claude

Perplexity

Manage Collections

Use the `list_collections` tool to see every existing NFT collection. You can then use `get_collection` to pull specific details for one. This lets your agent build a full picture of what's available in the marketplace.

Execute Minting Workflows

The `mint_nft` tool handles creating an NFT and putting it into a collection. You can chain this with `get_gas_tank_status` to ensure you have enough gas first. This makes sure your agent only attempts expensive operations when the finances are right.

Track Transactions

`list_mints` lets you pull a full roster of every NFT that's been minted. If you need to check on one specific transaction, use `get_mint_status`. This entire sequence allows your agent to build reliable reporting pipelines using the MCP Server.

Setup guide

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

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Common questions about Toket MCP in LangChain

LangChain treats every tool call as a step. You can set up an agent that first calls `list_collections` to decide which collection is best, then uses `create_collection`, and finally triggers a mint using `mint_nft`. It's all one decision chain.

Yep. The `get_gas_tank_status` tool checks your balance before you run a minting action. This prevents the agent from failing halfway through because of insufficient funds, saving you time and money.

You're working with collection metadata (names, symbols), gas tank status, and minting transaction records. The agent handles passing these structured results between tools for continuous processing.

You use the `MultiServerMCPClient` to manage connections, letting your single LangChain application talk to Toket and other sources. It keeps everything in one place while maintaining tool isolation.

This MCP Server touches Collection Metadata and Mint Status. Since these are public ledger actions, you'll primarily be handling transaction identifiers and asset names.

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