How to Use the Deck of Cards MCP in Mastra AI

Q: Can I require human approval before a Mastra AI agent shuffles a deck?

Yes, you can set the requireToolApproval option in Mastra AI for sensitive tools like reshuffledeck. This pauses the workflow until an admin approves the shuffle.

Q: How does Deck of Cards keep track of pile states in Mastra AI?

The agent uses listpile to fetch the current state of any pile. Mastra stores this data in its workflow context, making it easy to pass card lists to subsequent steps in your pipeline.

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Connect Deck of Cards MCP to Mastra AI

Create your Vinkius account to connect Deck of Cards to Mastra AI 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 Deck of Cards with Mastra AI

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Automate game rules using Mastra AI workflows

The `draw_cards` tool integrates into your Mastra AI workflows to handle turn-based game logic. If a player draws a specific card, Mastra uses conditional branching to determine whether to trigger `add_to_pile` or end the turn. When the workflow detects an empty deck, it automatically executes `reshuffle_deck` to keep the game running. The framework handles these transitions in the background, ensuring your game state never gets stuck.

Secure pile management with built-in retries

The `list_pile` tool lets your Mastra AI agent inspect the contents of a pile before making a move. If the API rate limit is reached, Mastra automatically retries the call with exponential backoff to prevent game disruptions. To move cards back, the agent runs `return_to_deck` within a structured workflow step. You can configure Mastra to require manual approval before executing this tool, keeping a human in the loop for high-stakes moves.

Custom deck setups via this MCP Server

The `create_partial_deck` tool allows your Mastra AI agent to generate custom decks with specific card configurations. This is useful for building specialized game modes like Blackjack or Euchre directly inside your agent's toolset. Once the partial deck is ready, the agent calls `shuffle_pile` to randomize the cards. The entire sequence is managed as a single Mastra workflow, giving you a reliable execution history for debugging.

Setup guide

Set up Deck of Cards MCP in Mastra AI

Prerequisites

Node.js 18+ and a TypeScript project
@mastra/mcp + @mastra/core packages
Active Vinkius subscription with a valid endpoint token

1

Install dependencies
Run npm install @mastra/mcp @mastra/core plus your preferred model provider (e.g. @ai-sdk/openai).
2

Configure the MCPClient
Create an MCPClient with your Vinkius endpoint as a URL object. Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com.
3

Discover and inject tools
Call mcpClient.listTools() and spread the result into your agent's tools object. All Deck of Cards tools become native Mastra tools.
4

Run with any model
Swap openai("gpt-4o") for any AI SDK-compatible provider. Call agent.generate() and the agent routes tool calls through MCP automatically.

agent.ts

import { MCPClient } from "@mastra/mcp";
import { Agent } from "@mastra/core/agent";
import { openai } from "@ai-sdk/openai";

const mcpClient = new MCPClient({
  id: "deck-of-cards-mcp-client",
  servers: {
    "deck-of-cards-mcp": {
      url: new URL(
        "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
      ),
    },
  },
});

const agent = new Agent({
  name: "Deck of Cards Agent",
  model: openai("gpt-4o"),
  instructions: "You have access to Deck of Cards tools.",
  tools: {
    ...(await mcpClient.listTools()),
  },
});

const result = await agent.generate(
  "List recent Deck of Cards transactions"
);
console.log(result.text);

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Common questions about Deck of Cards MCP in Mastra AI

Mastra AI features automatic retries with exponential backoff. If a call to `draw_cards` fails due to a temporary network glitch, the framework retries the action before reporting an error.

Yes, you can set the `requireToolApproval` option in Mastra AI for sensitive tools like `reshuffle_deck`. This pauses the workflow until an admin approves the shuffle.

The agent uses `list_pile` to fetch the current state of any pile. Mastra stores this data in its workflow context, making it easy to pass card lists to subsequent steps in your pipeline.

Yes, you can connect Mastra AI to the Vinkius MCP host using the HTTP transport. This allows you to test your card-dealing workflows locally before deploying them to the cloud.

The MCP Server only processes deck identifiers, pile names, and card codes (like 'AH' for Ace of Hearts). It does not access any personal user data or external databases, ensuring complete privacy.

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