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Lob

Lob MCP Server with 9 Tools Ready for AI Agents

MCP Inspector GDPR Free for Subscribers

Send physical mail programmatically with an API for postcards, letters, and checks that integrates into your digital workflows. Unlock 9 tools ready out of the box. Connect this App Connector to instantly empower AI agents like Claude Code, Cursor, or any MCP-compatible client with advanced capabilities.

Built for AI Agents by Vinkius

Ask AI about this App Connector

Open in ChatGPT Open in Claude Open in Perplexity

Vinkius delivers Streamable HTTP and SSE to any MCP client

AI Agent→Vinkius
High Security·Kill Switch·Plug and Play
Lob
Fully ManagedVinkius Servers
60%Token savings
High SecurityEnterprise-grade
IAMAccess control
EU AI ActCompliant
DLPData protection
V8 IsolateSandboxed
Ed25519Audit chain
<40msKill switch
Stream every event to Splunk, Datadog, or your own webhook in real-time

* 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

What is the Lob MCP Server?

The Lob MCP Server gives AI agents like Claude, ChatGPT, and Cursor direct access to Lob via 9 tools. Send physical mail programmatically with an API for postcards, letters, and checks that integrates into your digital workflows. Powered by the Vinkius - no API keys, no infrastructure, connect in under 2 minutes.

Built-in capabilities (9)

autocomplete_addresscreate_checkcreate_lettercreate_postcardget_mail_trackinglist_letterslist_postcardsverify_intl_addressverify_us_address

Tools for your AI Agents to operate Lob

Ask your AI agent "Send a welcome letter to a new customer and verify their address first." and get the answer without opening a single dashboard. With 9 tools connected to real Lob data, your agents reason over live information, cross-reference it with other MCP servers, and deliver insights you would spend hours assembling manually.

Works with Claude, ChatGPT, Cursor, and any MCP-compatible client. Powered by the Vinkius - your credentials never touch the AI model, every request is auditable. Connect in under two minutes.

Why teams choose Vinkius

One subscription gives you access to thousands of MCP servers - and you can deploy your own to the Vinkius Edge. Your AI agents only access the data you authorize, with DLP that blocks sensitive information from ever reaching the model, kill switch for instant shutdown, and up to 60% token savings. Enterprise-grade infrastructure and security, zero maintenance.

Build your own MCP Server with our secure development framework →

The Lob App Connector works with every AI agent you already use

…and any MCP-compatible client

CursorClaudeOpenAIVS CodeCopilotGoogleLovableMistralAWSCursorClaudeOpenAIVS CodeCopilotGoogleLovableMistralAWS

Use all 9 Lob tools with your AI agents right now

Empower your AI agents to connect to Lob and securely perform advanced actions on Vinkius infrastructure. Beyond a simple connection, you gain an advanced AI Gateway that provides complete visibility into agent activity, ensuring maximum governance and optimized token usage.

autocomplete_address

Suggest address completions

create_check

Send a physical check

create_letter

Supports certified mail and custom inserts. Send a physical letter

create_postcard

Supports HTML or PDF for front and back. Send a physical postcard

get_mail_tracking

Track a mail piece

list_letters

List sent letters

list_postcards

List sent postcards

verify_intl_address

Verify an international address

verify_us_address

Verify a US address

What the Lob MCP Server unlocks

Connect your Lob account to any AI agent and manage direct mail through natural conversation.

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

How it works

1. Subscribe to this server
2. Enter your Lob API Key (test or live)
3. Start sending mail from Claude, Cursor, or any MCP-compatible client

Who is this for?

  • Marketing — run direct mail campaigns with postcards and letters
  • Finance — automate check printing and mailing
  • Operations — verify addresses and track mail delivery

Frequently asked questions about the Lob MCP Server

01

Can I send letters and postcards through the AI agent?

Yes. Create and send letters with PDF/HTML content and postcards with custom designs. Track delivery through the postal system.

02

Does Lob use Basic Auth?

Yes. Lob uses HTTP Basic Auth with the API Key as username (no password) against api.lob.com/v1.

03

Can I verify US addresses?

Yes. Verify and standardize US addresses with CASS certification. Returns deliverability status, corrected addresses, and coordinates.

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