Lob MCP for AI Agents

Securely connect your AI agents and chatbots (Claude, ChatGPT, Cursor, etc) with Lob MCP or direct API to send letters, validate addresses, track mail, and manage templates through natural language.

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Api Key

Lob is a direct mail automation and address verification platform for businesses. It streamlines sending physical mail and validating addresses at scale with a simple API.

13 Tools

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Type what you want done — sign in and watch it run live in the Tool Router playground.

TOOL ROUTER PLAYGROUND
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TOOLS

Supported Tools

Every Lob action and event your agent gets out of the box.

Create Domain

Tool to add a new custom domain for creating custom links.

Create Link

Tool to create a shortened URL from a long URL using Lob's link shortening service.

Delete Domain

Tool to delete a registered domain.

Delete Link

Tool to delete a shortened link.

Delete Upload

Tool to delete an existing upload by its unique identifier.

Get Domain

Tool to retrieve details for a single domain from Lob.

Get Link

Tool to retrieve a single shortened link.

List Domains

Tool to retrieve a list of all created domains.

List Shortened Links

Tool to retrieve a list of shortened links.

List QR Code Analytics

Tool to retrieve a list of your QR codes and their analytics data.

List Uploads

Tool to list uploads from Lob.

Update Link

Tool to update any properties of a shortened link.

Validate Identity

Tool to validate whether a given name is associated with an address.

SETUP GUIDE

Connect Lob MCP Tool with your Agent

1

Install Composio

typescript
npm install @composio/core ai @ai-sdk/openai @ai-sdk/mcp
Install the Composio SDK for Python or TypeScript
2

Initialize Client and Create Tool Router Session

typescript
import { Composio } from '@composio/core';

const composio = new Composio({ apiKey: 'your-api-key' });
const session = await composio.create('your-user-id');
console.log(`Tool Router session created: ${session.mcp.url}`);
Import and initialize the Composio client, then create a Tool Router session for Lob
3

Connect to AI Agent

typescript
import { openai } from '@ai-sdk/openai';
import { experimental_createMCPClient as createMCPClient } from '@ai-sdk/mcp';
import { generateText } from 'ai';

const client = await createMCPClient({
  transport: {
    type: 'http',
    url: session.mcp.url,
    headers: {
      'x-api-key': 'your-composio-api-key',
    },
  },
});

const tools = await client.tools();
const { text } = await generateText({
  model: openai('gpt-4o'),
  tools,
  messages: [{
    role: 'user',
    content: 'Track delivery status for letter sent to 456 Oak Ave, Austin, TX'
  }],
  maxSteps: 5,
});

console.log(`Agent: ${text}`);
Use the MCP server with your AI agent (Anthropic Claude or Mastra)
SETUP GUIDE

Connect Lob API Tool with your Agent

1

Install Composio

typescript
npm install @composio/openai
Install the Composio SDK
2

Initialize Composio and Create Tool Router Session

typescript
import OpenAI from 'openai';
import { Composio } from '@composio/core';
import { OpenAIResponsesProvider } from '@composio/openai';

const composio = new Composio({
  provider: new OpenAIResponsesProvider(),
});
const openai = new OpenAI({});
const session = await composio.create('your-user-id');
Import and initialize Composio client, then create a Tool Router session
3

Execute Lob Tools via Tool Router with Your Agent

typescript
const tools = session.tools;
const response = await openai.responses.create({
  model: 'gpt-4.1',
  tools: tools,
  input: [{
    role: 'user',
    content: 'Send a letter to 123 Main St, New York, NY with the attached PDF.'
  }],
});
const result = await composio.provider.handleToolCalls(
  'your-user-id',
  response.output
);
console.log(result);
Get tools from Tool Router session and execute Lob actions with your Agent

Why Use Composio?

AI Native Lob Integration

  • Supports both Lob MCP and direct API based integrations
  • Structured, LLM-friendly schemas for reliable tool execution
  • Rich coverage for reading, writing, and querying your Lob data

Managed Auth

  • Built-in OAuth handling with automatic token refresh and rotation
  • Central place to manage, scope, and revoke Lob access
  • Per user and per environment credentials instead of hard-coded keys

Agent Optimized Design

  • Tools are tuned using real error and success rates to improve reliability over time
  • Comprehensive execution logs so you always know what ran, when, and on whose behalf

Enterprise Grade Security

  • Fine-grained RBAC so you control which agents and users can access Lob
  • Scoped, least privilege access to Lob resources
  • Full audit trail of agent actions to support review and compliance
FAQ

Frequently asked questions

Yes, Lob requires you to configure your own API key credentials. Once set up, Composio handles secure credential storage and API request handling for you.

Yes! Composio's Tool Router enables agents to use multiple toolkits. Learn more.

Composio is SOC 2 and ISO 27001 compliant with all data encrypted in transit and at rest. Learn more.

Composio maintains and updates all toolkit integrations automatically, so your agents always work with the latest API versions.

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