How to Use the Mailsac MCP in Mastra AI

Q: How do I add Mailsac tools to my Mastra AI agent?

Instantiate a new MCPClient with your server URL. Call listTools() and spread the results directly into your agent's tool array.

Q: Can Mastra AI search across all my Mailsac addresses?

Yes, assuming you are on a paid Mailsac tier. The searchaccountmessages tool accepts query parameters to find specific emails globally.

Q: Do I need human approval to delete Mailsac inboxes?

That is entirely up to you. You can enable requireToolApproval in Mastra if you want a developer to sign off before the agent executes the deletion.

Q: How does Mastra AI handle the privacy of Mailsac email bodies?

Mastra reads the payload directly from getplaintextbody. The text lives in your workflow memory temporarily while the agent parses it. Never send real customer data to disposable domains.

Build resilient Mastra AI workflows that generate Mailsac inboxes, verify email delivery, and clean up automatically.

See Vinkius in Action

Works with every AI agent you already use

…and any MCP-compatible client

MCP Servers - Free for Subscribers

Connect Mailsac MCP to Mastra AI

Create your Vinkius account to connect Mailsac 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.

GDPR Free for Subscribers

Setup Mailsac with Mastra AI

Ask AI about this MCP

ChatGPT

Claude

Perplexity

Create Deterministic Test Inboxes

The Mailsac MCP Server gives your Mastra workflows actual email endpoints. You tell the pipeline to start by calling `reserve_new_address`. This creates a predictable test environment. If the creation fails for any reason, Mastra's built-in retry logic catches the error and tries again with exponential backoff.

Verify Delivery with Conditional Branches

Verifying transactional emails requires polling. Your agent uses `search_account_messages` to hunt down specific subjects across the entire account. You can build conditional branches right here. If the email arrives, Mastra parses the link using `get_plain_text_body`, but if it never shows up, the workflow alerts your admin channel.

Automate Resource Teardown

Running hundreds of automated tests will eat up your inbox limits fast. Your agent needs to drop the addresses when the job finishes. Just add a final step in your Mastra pipeline that triggers `release_reserved_address`. It guarantees your Mailsac account stays clean, even if earlier steps in the workflow failed.

Setup guide

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

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

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

Get your connection token →

Independent Platform Disclaimer: Vinkius is an independent platform and is not affiliated with, endorsed by, sponsored by, verified by, or otherwise authorized by Mailsac. 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.

Why Choose Vinkius

Vinkius connects your tools to AI with real-time monitoring and automatic cost savings — all from one dashboard.

Connect Mailsac now

Real-time monitoring

Live

visibility into every interaction

Connect your favorite tools to your AI and see exactly what's happening — every request, every response, in real time.

Built-in savings

60%

lower AI costs

Vinkius compresses data between your apps and your AI automatically. Lower bills every month — no configuration required.

Single dashboard

One

place for every integration

Every tool your AI connects to, managed from a single screen. One account, complete control.

Common questions about Mailsac MCP in Mastra AI

Instantiate a `new MCPClient` with your server URL. Call `listTools()` and spread the results directly into your agent's tool array.

Yes, assuming you are on a paid Mailsac tier. The `search_account_messages` tool accepts query parameters to find specific emails globally.

Mastra handles retries automatically. You configure the backoff settings so temporary Mailsac hiccups don't crash your entire testing suite.

That is entirely up to you. You can enable `requireToolApproval` in Mastra if you want a developer to sign off before the agent executes the deletion.

Mastra reads the payload directly from `get_plain_text_body`. The text lives in your workflow memory temporarily while the agent parses it. Never send real customer data to disposable domains.

Use it with your favorite AI tools

Connect this server to Cursor, Claude, VS Code, and more.

OpenAI Agents SDK sdk-python

Google ADK sdk-python

Pydantic AI sdk-python

Vercel AI SDK sdk-typescript