How to Use the WhatsApp Message Sender MCP in Mastra AI

Q: How does Mastra AI ensure reliable WhatsApp Message Sender calls?

Mastra AI handles the failures automatically. If sendwhatsappmessage fails, your workflow engine executes retries using exponential backoff before giving up.

Q: What format do I need for the phone number when using WhatsApp Message Sender with Mastra AI?

The sendwhatsappmessage tool requires the destination number in E.164 format, ensuring you don't use any plus signs or regional codes outside of that standard.

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Connect WhatsApp Message Sender MCP to Mastra AI

Create your Vinkius account to connect WhatsApp Message Sender 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 WhatsApp Message Sender with Mastra AI

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Reliable WhatsApp Message Sending Workflows

The `send_whatsapp_message` tool sends a text message using the official Meta API. Because you use Mastra AI, if sending fails (say, due to a temporary network issue), your workflow engine can automatically retry with exponential backoff. This means your complex multi-step process doesn't break over a single failed WhatsApp Message Sender attempt. It keeps trying until it succeeds or hits a defined limit.

Conditional Sending Logic

You can wrap the `send_whatsapp_message` tool in conditional branching logic within Mastra AI. For example, if an initial payment fails, your workflow might decide to use the WhatsApp Message Sender to notify an admin instead of trying a different method. This allows for much smarter operations than simple linear scripts. The agent framework handles all that decision-making gracefully.

One-Command Deployment with MCP Server

Deploying your entire workflow, including the `send_whatsapp_message` tool call, is a single command in Mastra AI. You define the steps—like gathering recipient data and calling the WhatsApp Message Sender—and the framework manages deployment to any cloud. This drastically simplifies moving from development to production. It's built for complex systems that need reliability.

Setup guide

Set up WhatsApp Message Sender 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 WhatsApp Message Sender 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: "whatsapp-message-sender-mcp-client",
  servers: {
    "whatsapp-message-sender-mcp": {
      url: new URL(
        "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
      ),
    },
  },
});

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

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

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Common questions about WhatsApp Message Sender MCP in Mastra AI

Mastra AI handles the failures automatically. If `send_whatsapp_message` fails, your workflow engine executes retries using exponential backoff before giving up.

The `send_whatsapp_message` tool requires the destination number in E.164 format, ensuring you don't use any plus signs or regional codes outside of that standard.

The underlying Meta API governs timing; sending to users outside the 24-hour window still requires pre-approved templates. Your workflow simply attempts the call, and the API determines success based on those rules.

The server touches phone numbers (E.164 format) and text bodies. These are considered Personal Identifiable Information (PII), so secure handling is mandatory.

Absolutely. You can build multi-step processes where the output of one step dictates whether or how `send_whatsapp_message` runs, handling failures along the way.

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