Mailosaur MCP Server for Mastra AI 8 tools — connect in under 2 minutes
Mastra AI is a TypeScript-native agent framework built for modern web stacks. Connect Mailosaur through Vinkius and Mastra agents discover all tools automatically. type-safe, streaming-ready, and deployable anywhere Node.js runs.
ASK AI ABOUT THIS MCP SERVER
Vinkius supports streamable HTTP and SSE.
import { Agent } from "@mastra/core/agent";
import { createMCPClient } from "@mastra/mcp";
import { openai } from "@ai-sdk/openai";
async function main() {
// Your Vinkius token. get it at cloud.vinkius.com
const mcpClient = await createMCPClient({
servers: {
"mailosaur": {
url: "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp",
},
},
});
const tools = await mcpClient.getTools();
const agent = new Agent({
name: "Mailosaur Agent",
instructions:
"You help users interact with Mailosaur " +
"using 8 tools.",
model: openai("gpt-4o"),
tools,
});
const result = await agent.generate(
"What can I do with Mailosaur?"
);
console.log(result.text);
}
main();
* Every MCP server runs on Vinkius-managed infrastructure inside AWS - a purpose-built runtime with per-request V8 isolates, Ed25519 signed audit chains, and sub-40ms cold starts optimized for native MCP execution. See our infrastructure
About Mailosaur MCP Server
Connect your Mailosaur account to any AI agent to automate your email and SMS testing workflows. This MCP server enables your agent to manage virtual servers (inboxes), retrieve and search for messages, and extract content for validation directly from natural language interfaces.
Mastra's agent abstraction provides a clean separation between LLM logic and Mailosaur tool infrastructure. Connect 8 tools through Vinkius and use Mastra's built-in workflow engine to chain tool calls with conditional logic, retries, and parallel execution. deployable to any Node.js host in one command.
What you can do
- Virtual Inbox Oversight — List and manage all virtual servers and retrieve their unique routing domains
- Message Retrieval — List all email and SMS messages received by a specific server instantly
- Advanced Search — Find specific messages by sender, recipient, subject, or body content using detailed criteria
- Content Inspection — Retrieve the full HTML and text content of any message for automated validation
- Inbox Maintenance — Clear entire server inboxes or delete specific messages via simple commands
- Dynamic Infrastructure — Create and configure new virtual servers programmatically for testing isolation
The Mailosaur MCP Server exposes 8 tools through the Vinkius. Connect it to Mastra AI in under two minutes — no API keys to rotate, no infrastructure to provision, no vendor lock-in. Your configuration, your data, your control.
How to Connect Mailosaur to Mastra AI via MCP
Follow these steps to integrate the Mailosaur MCP Server with Mastra AI.
Install dependencies
Run npm install @mastra/core @mastra/mcp @ai-sdk/openai
Replace the token
Replace [YOUR_TOKEN_HERE] with your Vinkius token
Run the agent
Save to agent.ts and run with npx tsx agent.ts
Explore tools
Mastra discovers 8 tools from Mailosaur via MCP
Why Use Mastra AI with the Mailosaur MCP Server
Mastra AI provides unique advantages when paired with Mailosaur through the Model Context Protocol.
Mastra's agent abstraction provides a clean separation between LLM logic and tool infrastructure. add Mailosaur without touching business code
Built-in workflow engine chains MCP tool calls with conditional logic, retries, and parallel execution for complex automation
TypeScript-native: full type inference for every Mailosaur tool response with IDE autocomplete and compile-time checks
One-command deployment to any Node.js host. Vercel, Railway, Fly.io, or your own infrastructure
Mailosaur + Mastra AI Use Cases
Practical scenarios where Mastra AI combined with the Mailosaur MCP Server delivers measurable value.
Automated workflows: build multi-step agents that query Mailosaur, process results, and trigger downstream actions in a typed pipeline
SaaS integrations: embed Mailosaur as a first-class tool in your product's AI features with Mastra's clean agent API
Background jobs: schedule Mastra agents to query Mailosaur on a cron and store results in your database automatically
Multi-agent systems: create specialist agents that collaborate using Mailosaur tools alongside other MCP servers
Mailosaur MCP Tools for Mastra AI (8)
These 8 tools become available when you connect Mailosaur to Mastra AI via MCP:
clear_server_inbox
Delete all messages in a server
create_virtual_server
Create a new virtual server/inbox
delete_specific_message
Permanently remove a message
get_message_content
Get the full content of a specific message
get_server_details
Get details for a specific virtual server
list_server_messages
List all messages in a virtual server
list_virtual_servers
Use this to identify server IDs. List all Mailosaur virtual servers
search_server_messages
Requires a server ID and criteria like sentTo, sentFrom, or subject. Search for specific messages using criteria
Example Prompts for Mailosaur in Mastra AI
Ready-to-use prompts you can give your Mastra AI agent to start working with Mailosaur immediately.
"List all my Mailosaur servers."
"Find the last message sent to 'test-user@mailosaur.io' in server 'prod123'."
"Delete all messages in the 'Dev Sandbox' server (ID: 'dev789')."
Troubleshooting Mailosaur MCP Server with Mastra AI
Common issues when connecting Mailosaur to Mastra AI through the Vinkius, and how to resolve them.
createMCPClient not exported
npm install @mastra/mcpMailosaur + Mastra AI FAQ
Common questions about integrating Mailosaur MCP Server with Mastra AI.
How does Mastra AI connect to MCP servers?
MCPClient with the server URL and pass it to your agent. Mastra discovers all tools and makes them available with full TypeScript types.Can Mastra agents use tools from multiple servers?
Does Mastra support workflow orchestration?
Connect Mailosaur with your favorite client
Step-by-step setup guides for every MCP-compatible client and framework:
Anthropic's native desktop app for Claude with built-in MCP support.
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GitHub Copilot in VS Code with Agent mode and MCP support.
Purpose-built IDE for agentic AI coding workflows.
Autonomous AI coding agent that runs inside VS Code.
Anthropic's agentic CLI for terminal-first development.
Python SDK for building production-grade OpenAI agent workflows.
Google's framework for building production AI agents.
Type-safe agent development for Python with first-class MCP support.
TypeScript toolkit for building AI-powered web applications.
TypeScript-native agent framework for modern web stacks.
Python framework for orchestrating collaborative AI agent crews.
Leading Python framework for composable LLM applications.
Data-aware AI agent framework for structured and unstructured sources.
Microsoft's framework for multi-agent collaborative conversations.
Connect Mailosaur to Mastra AI
Get your token, paste the configuration, and start using 8 tools in under 2 minutes. No API key management needed.