Lob MCP Server for Vercel AI SDKGive Vercel AI SDK instant access to 9 tools to Autocomplete Address, Create Check, Create Letter, and more
The Vercel AI SDK is the TypeScript toolkit for building AI-powered applications. Connect Lob through Vinkius and every tool is available as a typed function. ready for React Server Components, API routes, or any Node.js backend.
Ask AI about this App Connector for Vercel AI SDK
The Lob app connector for Vercel AI SDK 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 { createMCPClient } from "@ai-sdk/mcp";
import { generateText } from "ai";
import { openai } from "@ai-sdk/openai";
async function main() {
const mcpClient = await createMCPClient({
transport: {
type: "http",
// Your Vinkius token. get it at cloud.vinkius.com
url: "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp",
},
});
try {
const tools = await mcpClient.tools();
const { text } = await generateText({
model: openai("gpt-4o"),
tools,
prompt: "Using Lob, list all available capabilities.",
});
console.log(text);
} finally {
await mcpClient.close();
}
}
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.
The Vercel AI SDK gives every Lob tool full TypeScript type inference, IDE autocomplete, and compile-time error checking. Connect 9 tools through Vinkius and stream results progressively to React, Svelte, or Vue components. works on Edge Functions, Cloudflare Workers, and any Node.js runtime.
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 Vercel AI SDK 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 Vercel AI SDK
When Vercel AI SDK 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 Vercel AI SDK via MCP
Follow these steps to wire Lob into Vercel AI SDK. The entire setup takes under two minutes — your credentials stay safe behind the Vinkius.
Install dependencies
npm install @ai-sdk/mcp ai @ai-sdk/openaiReplace the token
[YOUR_TOKEN_HERE] with your Vinkius tokenRun the script
agent.ts and run with npx tsx agent.tsExplore tools
Why Use Vercel AI SDK with the Lob MCP Server
Vercel AI SDK provides unique advantages when paired with Lob through the Model Context Protocol.
TypeScript-first: every MCP tool gets full type inference, IDE autocomplete, and compile-time error checking out of the box
Framework-agnostic core works with Next.js, Nuxt, SvelteKit, or any Node.js runtime. same Lob integration everywhere
Built-in streaming UI primitives let you display Lob tool results progressively in React, Svelte, or Vue components
Edge-compatible: the AI SDK runs on Vercel Edge Functions, Cloudflare Workers, and other edge runtimes for minimal latency
Lob + Vercel AI SDK Use Cases
Practical scenarios where Vercel AI SDK combined with the Lob MCP Server delivers measurable value.
AI-powered web apps: build dashboards that query Lob in real-time and stream results to the UI with zero loading states
API backends: create serverless endpoints that orchestrate Lob tools and return structured JSON responses to any frontend
Chatbots with tool use: embed Lob capabilities into conversational interfaces with streaming responses and tool call visibility
Internal tools: build admin panels where team members interact with Lob through natural language queries
Example Prompts for Lob in Vercel AI SDK
Ready-to-use prompts you can give your Vercel AI SDK 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 Vercel AI SDK
Common issues when connecting Lob to Vercel AI SDK through the Vinkius, and how to resolve them.
createMCPClient is not a function
npm install @ai-sdk/mcpLob + Vercel AI SDK FAQ
Common questions about integrating Lob MCP Server with Vercel AI SDK.
How does the Vercel AI SDK connect to MCP servers?
createMCPClient from @ai-sdk/mcp and pass the server URL. The SDK discovers all tools and provides typed TypeScript interfaces for each one.Can I use MCP tools in Edge Functions?
Does it support streaming tool results?
useChat and streamText that handle tool calls and display results progressively in the UI.