How to Use the Reply.io MCP in Mastra AI

Q: Does Mastra AI support human approval for Reply.io actions?

Yes, use the requireToolApproval setting in your MCP client. This forces the agent to pause and wait for you to confirm the resumeperson or addperson action.

Build complex outreach workflows in Mastra AI with direct Reply.io tool access.

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Works with every AI agent you already use

…and any MCP-compatible client

MCP Servers — Included with Plan

Connect Reply.io MCP to Mastra AI

Create your Vinkius account to connect Reply.io to Mastra AI — we handle the hosting, security, and runtime updates so you don't have to. No server setup required.

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Setup Reply.io with Mastra AI

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Automated Reply.io sequences in Mastra AI

Create conditional workflows that react to prospect actions. Your Mastra AI agent can use `list_people` to find the right contacts and move them through steps based on your specific rules. Define the logic once, and the agent executes it across your entire contact list. It handles the heavy lifting of managing state without needing a human to click buttons.

Handle Reply.io failures in Mastra AI

Mastra AI manages the retries if an API call hits a limit or fails. When you use `add_person` or `pause_person`, the workflow engine ensures the task finishes or alerts you if it can't. This is essential for keeping your outbound machine running. You build the path, and the agent follows it, even when things get messy.

Sync email accounts with Mastra AI

Your agent can audit your sending infrastructure using `list_email_accounts`. If a specific account shows low engagement, your Mastra AI workflow can trigger a swap or alert you. It gives you visibility into your domain health. You see the account status and can adjust your outreach strategy dynamically based on real-time performance.

Setup guide

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

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

const result = await agent.generate(
  "List recent Reply.io 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 Reply.io. 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 Reply.io 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 Reply.io MCP in Mastra AI

Initialize the MCP client in your agent configuration and spread the available tools into your agent's toolset. This gives your Mastra AI agent full control over your Reply.io data.

Absolutely. You can set up a workflow that monitors incoming replies and triggers `pause_person` automatically if the sentiment indicates the lead is no longer interested.

Yes, use the `requireToolApproval` setting in your MCP client. This forces the agent to pause and wait for you to confirm the `resume_person` or `add_person` action.

The Mastra AI workflow engine handles the timing. You can set up your steps with delays if you find yourself hitting the Reply.io rate thresholds.

Access is restricted to the specific API key you provide. All communication between your agent and the Reply.io endpoint is ephemeral and encrypted, ensuring your prospect contact lists remain private.

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