Lob MCP Server for Mastra AIGive Mastra AI instant access to 9 tools to Autocomplete Address, Create Check, Create Letter, and more
Mastra AI is a TypeScript-native agent framework built for modern web stacks. Connect Lob through Vinkius and Mastra agents discover all tools automatically. type-safe, streaming-ready, and deployable anywhere Node.js runs.
Ask AI about this App Connector for Mastra AI
The Lob app connector for Mastra AI is a standout in the Marketing Automation category — giving your AI agent 9 tools to work with, ready to go from day one.
Vinkius delivers Streamable HTTP and SSE to any MCP client
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: {
"lob-alternative": {
url: "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp",
},
},
});
const tools = await mcpClient.getTools();
const agent = new Agent({
name: "Lob Agent",
instructions:
"You help users interact with Lob " +
"using 9 tools.",
model: openai("gpt-4o"),
tools,
});
const result = await agent.generate(
"What can I do with Lob?"
);
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 Lob MCP Server
Connect your Lob account to any AI agent and manage direct mail through natural conversation.
Mastra's agent abstraction provides a clean separation between LLM logic and Lob tool infrastructure. Connect 9 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
- Letter Sending — Create and send letters with PDF or HTML content
- Postcard Campaigns — Send postcards with front/back designs
- Check Printing — Create and mail checks with payment details
- Address Verification — Verify and standardize US addresses
- Template Management — Browse and manage mail templates
- Delivery Tracking — Track mail pieces through the postal system
The Lob MCP Server exposes 9 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.
All 9 Lob tools available for Mastra AI
When Mastra AI connects to Lob through Vinkius, your AI agent gets direct access to every tool listed below — spanning direct-mail, address-verification, print-automation, and more. Every call is secured with network, filesystem, subprocess, and code evaluation entitlements inside a sandboxed runtime. Beyond a simple connection, you get a full AI Gateway with real-time visibility into agent activity, enterprise governance, and optimized token usage.
Suggest address completions
Send a physical check
Supports certified mail and custom inserts. Send a physical letter
Supports HTML or PDF for front and back. Send a physical postcard
Track a mail piece
List sent letters
List sent postcards
Verify an international address
Verify a US address
Connect Lob to Mastra AI via MCP
Follow these steps to wire Lob into Mastra AI. The entire setup takes under two minutes — your credentials stay safe behind the Vinkius.
Install dependencies
npm install @mastra/core @mastra/mcp @ai-sdk/openaiReplace the token
[YOUR_TOKEN_HERE] with your Vinkius tokenRun the agent
agent.ts and run with npx tsx agent.tsExplore tools
Why Use Mastra AI with the Lob MCP Server
Mastra AI provides unique advantages when paired with Lob through the Model Context Protocol.
Mastra's agent abstraction provides a clean separation between LLM logic and tool infrastructure. add Lob 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 Lob 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
Lob + Mastra AI Use Cases
Practical scenarios where Mastra AI combined with the Lob MCP Server delivers measurable value.
Automated workflows: build multi-step agents that query Lob, process results, and trigger downstream actions in a typed pipeline
SaaS integrations: embed Lob as a first-class tool in your product's AI features with Mastra's clean agent API
Background jobs: schedule Mastra agents to query Lob on a cron and store results in your database automatically
Multi-agent systems: create specialist agents that collaborate using Lob tools alongside other MCP servers
Example Prompts for Lob in Mastra AI
Ready-to-use prompts you can give your Mastra AI agent to start working with Lob immediately.
"Send a welcome letter to a new customer and verify their address first."
"Show all mail pieces sent this month with delivery status."
"Create a check for $5,000 and browse mail templates."
Troubleshooting Lob MCP Server with Mastra AI
Common issues when connecting Lob to Mastra AI through the Vinkius, and how to resolve them.
createMCPClient not exported
npm install @mastra/mcpLob + Mastra AI FAQ
Common questions about integrating Lob 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.