How to Use the Handwrytten MCP in Mastra AI

Q: Can I automate Handwrytten credit alerts in Mastra AI?

Absolutely. Create a scheduled workflow that calls getcreditbalance. If the value falls below a certain limit, have the agent send a notification to your team.

Build complex physical mail workflows in Mastra AI. Automate multi-step card campaigns with built-in failure recovery and retries.

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Connect Handwrytten MCP to Mastra AI

Create your Vinkius account to connect Handwrytten 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 Handwrytten with Mastra AI

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Automate mail workflows in Mastra AI

Create agentic workflows that trigger physical mail based on user events. Use `send_card` as a step in your pipeline to bridge the gap between digital triggers and physical delivery. Handle errors effectively by wrapping the tool calls in retry logic. If a request fails, Mastra can attempt to re-send or notify an admin agent to intervene.

Conditional mail logic for agents

Build decision trees using `list_categories` and `list_templates` to select the right card for the right customer. Agents can branch logic based on specific recipient segments. Ensure you never run out of credits by checking `get_credit_balance` before initiating a workflow. Add a conditional check to stop the process if the balance drops below your threshold.

Coordinate physical gifts and cards

Include physical gifts in your workflows using `list_gifts`. Agents can select the perfect item to pair with a card, creating a premium touchpoint for high-value accounts. Verify order history with `list_orders` before sending follow-up mail. This prevents duplicate sends and keeps your customer engagement data clean.

Setup guide

Set up Handwrytten 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 Handwrytten 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: "handwrytten-mcp-client",
  servers: {
    "handwrytten-mcp": {
      url: new URL(
        "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
      ),
    },
  },
});

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

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

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Independent Platform Disclaimer: Vinkius is an independent platform and is not affiliated with, endorsed by, sponsored by, verified by, or otherwise authorized by Handwrytten. 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 Handwrytten MCP in Mastra AI

Define the server in your Mastra client configuration. Once connected, spread the tools into your agent to enable physical mail actions.

Yes. Use the requireToolApproval setting to pause the workflow. This lets you inspect the card content before the agent executes the final send.

Absolutely. Create a scheduled workflow that calls `get_credit_balance`. If the value falls below a certain limit, have the agent send a notification to your team.

All data is handled within an isolated sandbox. Your address book stays protected, and only the necessary fields are passed to the mailing API.

Each tool call is logged by the agent execution engine. You can store these logs to track every card sent and link orders back to specific customer events.

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