How do I connect my Lob account?

You subscribe to the MCP on Vinkius and enter your Lob API key. Once connected, it is ready to use in your AI client.

Can I send checks with this MCP?

Yes, the MCP includes a capability to create and mail physical checks.

Does it support international mail?

Yes, there is a specific capability to verify international addresses to ensure they are correct.

What kind of mail can I send?

You can send physical letters, postcards, and checks.

Yes, you can use the mail tracking capability to see where your pieces are in the postal system.

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.

Does Lob use Basic Auth?

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

Can I verify US addresses?

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

An astronaut overseeing a futuristic data hub

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Connect Lob to ChatGPT, Claude and Gemini

Set it up once and it works in ChatGPT, Claude, Cursor, and any other client you love. It all runs safely in the background, so you can relax and focus on what really matters. Turn digital commands into real world mail delivery.

Ask AI about this Connector

Developed, maintained, and hosted by Vinkius.

MCP VERIFIED · PRODUCTION READY · VINKIUS GUARANTEED

Waiting for input…

Works with modern AI clients that support MCP, including ChatGPT, Claude, Cursor, and more.

Your AI does the work. We keep it safe and sound.

No other AI tool gives you this. Your workflow runs in the client you already love, your account stays protected, and you decide what the agent can and cannot do. It is the whole reason to make the switch.

Each Connector lives inside our infrastructure, the same place where your workflow runs. The three things below are already part of it, working quietly in the background so you never have to think about them. Nothing to add, nothing to set up, nothing to worry about.

V8 Isolate01

Each Connector runs inside its own sealed environment.

Each Connector runs inside its own sealed V8 runtime — no access to your files, your system, or other servers. A Connector never sees past its own request.

Kill Switch02

One switch stops every agent. Instantly.

One action deactivates every Connector, revokes every token, and ends every session at once. AI Governance keeps the record.

FinOps per User03

Spending limits that pause instead of surprise.

Every user keeps their own connections and credentials, isolated from everyone else. Anything that would cross your spending limit is held for your approval, not billed.

Three controls, built into the layer your AI connects through.

Curated set · 9 capabilities

We ship only the actions that matter.

Capability set01 / 03

01-03

3 capabilities in this set.

Part of 9 available through Lob.

01
Create letter
Sends a physical letter using PDF or HTML content. It supports certified mail and custom inserts.
02
List letters
Retrieves a list of all letters you have sent.
03
Autocomplete address
Provides address suggestions to help you complete a destination quickly.

Capability set02 / 03

04-06

3 capabilities in this set.

Part of 9 available through Lob.

04
Create check
Triggers the printing and mailing of a physical check.
05
Create postcard
Sends a physical postcard using HTML or PDF designs for the front and back.
06
Get mail tracking
Checks the current delivery status of a specific mail piece.

Capability set03 / 03

07-09

3 capabilities in this set.

Part of 9 available through Lob.

07
List postcards
Shows a history of all postcards sent through the account.
08
Verify intl address
Validates international addresses to prevent delivery failures.
09
Verify us address
Checks and standardizes US addresses for accuracy.

Real work

What teams actually run

Customer Onboarding

Send a physical welcome letter immediately after a user signs up digitally.

Accounts Payable

Instruct your agent to print and mail a check once an invoice is approved.

Direct Mail Marketing

Launch a postcard campaign by describing the design and recipient list to your agent.

Address Cleanup

Use the agent to verify a list of addresses before starting a large mailing run.

Automate a task

Put Lob to work on one thing.

Step-by-step automations your AI runs through this Connector: the workflow, the prompts to start with, and the exact capabilities behind each move.

One connector, every AI

Lob works with the most popular AI clients.

These are the most popular clients, each with a step-by-step guide: one link, set up once, with governance and visibility built in. And because everything runs on the MCP standard, the same connection also works in any other compatible client — nothing to rebuild.

Building your own app? The connector is yours to use.

You don't need a client to put Lob to work: the same hosted connection plugs into your own applications and agent code, with the same governance on every request. Build with it, chat with it — one connection for both.

Observed, not estimated

956ms average. Fast in production.

Lob is checked daily against the live service.

Daily averagePeak 1234ms

Oct 3Today

Fastest day: 806ms
Slowest day: 1234ms
14-day trend: Slowing+37%

Connect your client

One URL. Every client.

Activate the Connector, copy your link, and paste it into the client you already use. 9 capabilities arrive ready to run.

Preview access · not provider authentication

The vk_preview_* token belongs to Vinkius preview infrastructure. It lets Claude discover and display the capabilities of Lob, so you can see the experience inside your AI.

It does not authenticate your account with Lob. Actions requiring credentials or live account data may not run until you activate the Connector and authorize the service.

Lob Connector

You're all set. Choose your MCP client and follow the setup instructions.

Connector linkhttps://edge.vinkius.com/vk_preview_QGpJ6KHhrS8a6OlK7vmqkJoZPOKxvw7lIUko4Mcm/mcp

Claude Desktop

Follow the steps below to connect in seconds.

1In Claude Desktop, open Settings → Connectors.
2Click “Add custom connector” and paste the connector link above as the remote MCP server URL.
3Click Add and start a new chat — Lob capabilities are ready to use.

Configuration · claude_desktop_config.jsonCopy

{
  "mcpServers": {
    "lob-mcp": {
      "url": "https://edge.vinkius.com/vk_preview_QGpJ6KHhrS8a6OlK7vmqkJoZPOKxvw7lIUko4Mcm/mcp"
    }
  }
}

Claude
ChatGPT
Cursor
VS Code
Windsurf
Claude Code
JetBrains
Cline

Step-by-step instructions for each client are in the guide. How to connect

Guided setup for Claude? Set up Lob in Claude and other AIs

See all the AI clients this connector works with ↑

Who it's for

Built for the work Lob owners hand off.

Professionals who need to bridge digital workflows with physical mail delivery.

01
Marketing Managers
They use the agent to trigger postcard campaigns and letters for customer outreach.
02
Finance Teams
They automate the printing and mailing of physical checks.
03
Operations Staff
They use the agent to verify addresses and track mail delivery status.

FAQ

Questions Lob owners ask.

01
How do I connect my Lob account?
You subscribe to the MCP on Vinkius and enter your Lob API key. Once connected, it is ready to use in your AI client.
02
Can I send checks with this MCP?
Yes, the MCP includes a capability to create and mail physical checks.
03
Does it support international mail?
Yes, there is a specific capability to verify international addresses to ensure they are correct.
04
What kind of mail can I send?
You can send physical letters, postcards, and checks.
05
Can I track my mail?
Yes, you can use the mail tracking capability to see where your pieces are in the postal system.
06
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.
07
Does Lob use Basic Auth?
Yes. Lob uses HTTP Basic Auth with the API Key as username (no password) against api.lob.com/v1.
08
Can I verify US addresses?
Yes. Verify and standardize US addresses with CASS certification. Returns deliverability status, corrected addresses, and coordinates.

Explore

More in Marketing Automation

Connect Lob to Claude, Cursor, ChatGPT & more

Your AI does the work. We keep it safe and sound.

Each Connector runs inside its own sealed environment.

One switch stops every agent. Instantly.

Spending limits that pause instead of surprise.

We ship only the actions that matter.

01-03

Create letter

List letters

Autocomplete address

04-06

Create check

Create postcard

Get mail tracking

07-09

List postcards

Verify intl address

Verify us address

What teams actually run

Customer Onboarding

Accounts Payable

Direct Mail Marketing

Address Cleanup

Building your own app? The connector is yours to use.

Lob Connector

Claude Desktop

Marketing Managers

Finance Teams

Operations Staff

How do I connect my Lob account?

Can I send checks with this MCP?

Does it support international mail?

What kind of mail can I send?

Can I track my mail?

Can I send letters and postcards through the AI agent?

Does Lob use Basic Auth?

Can I verify US addresses?

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