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Lob MCP Server

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Lob provides an API for businesses to automate and manage direct mail and address verification tasks. Use it to streamline mailing operations and ensure address accuracy.

49 tools
Agent guide included
API Key
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AI Skill
SKILL.md

Domain knowledge for Lob — workflow patterns, data models, and gotchas for your AI agent.

Lob

Lob provides an API for automating direct mail and address verification. Streamline mailing operations and ensure address accuracy.

Data Model

  • Addresses — verified addresses for mailings.
  • Banks — bank accounts for checks.
  • Billing Groups — billing groupings.
  • Buckslips — buckslip designs; have orders.
  • Buckslip Orders — orders of buckslips.
  • Cards — card designs; have orders.
  • Card Orders — orders of cards.
  • Checks — check mailings.
  • Letters — letter mailings.
  • Campaigns — marketing campaigns.
  • Postcards — postcard mailings.
  • Self Mailers — self-mailer mailings.
  • Templates — reusable templates; have versions.
  • Template Versions — versions of a template.
  • Uploads — uploaded creative assets.

Gotchas

  • Address verification: Use the verification endpoint before creating mail to avoid failed sends.
  • Cancel window: Letters and postcards can be cancelled before they enter the mail stream; check status.

Tools in this Server (49)

Delete

Universal delete tool that removes ANY Lob resource using smart ID routing with colon-separated format. Supports addresses, templates, template versio...

Lob Cancel Check

Cancel a Lob check before it is sent. Can only cancel checks that haven't been sent yet. Returns confirmation of cancellation.

Lob Cancel Letter

Cancel a Lob letter before it is sent. Can only cancel letters that haven't been sent yet. Returns confirmation of cancellation.

Lob Cancel Postcard

Cancel a Lob postcard before it is sent. Can only cancel postcards that haven't been sent yet. Returns confirmation of cancellation.

Lob Create Buckslip Order

Create a buckslip order for a specific buckslip. Required fields: buckslip_id, quantity, use_type. Orders are used to purchase physical buckslips for ...

Lob Create Card Order

Create a card order for a specific card. Required fields: card_id, quantity, use_type. Orders are used to purchase physical cards for mailing campaign...

Lob Create Check

Create and send a Lob check. Required fields: to (address), from_address (address), bank_account (bank_...), amount (dollars). Checks are sent immedia...

Lob Create Letter

Create and send a Lob letter. Required fields: to (address), from_address (address), file (template, HTML, or PDF URL). Letters are sent immediately u...

Lob Create Postcard

Create and send a Lob postcard. Required fields: to (address), from_address (address), front (template or HTML). Postcards are sent immediately unless...

Lob Create Self Mailer

Create and send a Lob self-mailer. Required fields: to (address), from_address (address), inside (template or HTML), outside (template or HTML), size....

Lob Create Upload Export

Create an export for a Lob upload. Required fields: upl_id, type. Exports allow you to download upload data including validation results and failure d...

Lob Get Address

Fetch a single Lob address by ID.

Lob Get Bank Account

Fetch a single Lob bank account by ID.

Lob Get Billing Group

Fetch a single Lob billing group by ID.

Lob Get Buckslip

Fetch a single Lob buckslip by ID.

Lob Get Card

Fetch a single Lob card by ID.

Lob Get Check

Fetch a single Lob check by ID.

Lob Get Letter

Fetch a single Lob letter by ID.

Lob Get Postcard

Fetch a single Lob postcard by ID.

Lob Get Self Mailer

Fetch a single Lob self mailer by ID.

Lob Get Template

Fetch a single Lob template by ID.

Lob Get Template Version

Fetch a specific Lob template version by ID.

Lob Get Upload

Fetch a single Lob upload by ID.

Lob List Addresses

List stored addresses in your Lob account. Returns address metadata and IDs used by other Lob tools.

Lob List Banks

List bank accounts linked to your Lob account.

Lob List Billing Groups

List billing groups in your Lob account.

Lob List Buckslip Orders

List orders for a specific Lob buckslip.

Lob List Buckslips

List buckslips in your Lob account.

Lob List Campaigns

List campaigns in your Lob account.

Lob List Card Orders

List orders for a specific Lob card.

Lob List Cards

List cards in your Lob account.

Lob List Checks

List checks in your Lob account.

Lob List Letters

List letters in your Lob account.

Lob List Postcards

List postcards in your Lob account.

Lob List Qr Code Analytics

List QR code analytics for Lob campaigns.

Lob List Self Mailers

List self mailers in your Lob account.

Lob List Templates

List templates in your Lob account.

Lob List Templates Versions

List versions for a specific Lob template.

Lob List Uploads

List file uploads in your Lob account.

Lob Upsert Address

Create or update a Lob address. Provide adr_id to update existing address, omit to create new. Required fields for create: name, address_line1, addres...

Lob Upsert Bank Account

Create or update a Lob bank account. Provide bank_id to update existing bank account, omit to create new. Required fields for create: routing_number, ...

Lob Upsert Billing Group

Create or update a Lob billing group. Provide bg_id to update existing billing group, omit to create new. Required field for create: name.

Lob Upsert Buckslip

Create or update a Lob buckslip. Provide buckslip_id to update existing buckslip, omit to create new. Required field for create: size.

Lob Upsert Campaign

Create or update a Lob campaign. Provide cmp_id to update existing campaign, omit to create new. Required fields for create: name, schedule_type. Camp...

Lob Upsert Card

Create or update a Lob card. Provide card_id to update existing card, omit to create new. Required field for create: size.

Lob Upsert Creative

Create or update a Lob creative. Provide creative_id to update existing creative, omit to create new. Required fields: campaign_id (always), resource_...

Lob Upsert Template

Create or update a Lob template. Provide tmpl_id to update existing template, omit to create new. Required field for create: html.

Lob Upsert Template Version

Create or update a Lob template version. Provide vrsn_id to update existing version, omit to create new. Required fields: tmpl_id (always), html (for ...

Lob Upsert Upload

Create or update a Lob upload. Provide upl_id to update existing upload, omit to create new. Required fields for create: campaign_id, name. Uploads ar...

Frequently Asked Questions

What is the Lob MCP server?

Lob provides an API for businesses to automate and manage direct mail and address verification tasks. Use it to streamline mailing operations and ensure address accuracy. It provides 49 tools that AI agents can use through the Model Context Protocol (MCP).

How do I connect Lob to my AI agent?

Add the MCPBundles server URL to your MCP client configuration (Claude Desktop, Cursor, VS Code, etc.). The URL format is: https://mcp.mcpbundles.com/bundle/lob. Authentication is handled automatically.

How many tools does Lob provide?

Lob provides 49 tools that can be called by AI agents, along with a SKILL.md that gives your AI agent domain knowledge about when and how to use them.

What authentication does Lob require?

Lob uses API Key. Lob requires credentials. Connect via MCPBundles and authentication is handled automatically.

Setup Instructions

Connect Lob to any MCP client in minutes

https://mcp.mcpbundles.com/bundle/lob

What is MCP?

Model Context Protocol lets AI tools call external capabilities securely through a single URL. This bundle groups tools behind an MCP endpoint that many clients can use.

Use this bundle in 3 steps

  1. Copy the MCP URL above
  2. Open your AI tool and add a new MCP/connector
  3. Paste the URL and follow any auth prompts

Claude Desktop Users

Skip the manual setup! Use the .mcpb file format for one-click installation. Check the Claude Desktop tab for setup instructions.

Pick your tool tab for exact steps

Select ChatGPT, Cursor, Claude Code, or another tab for copy-paste config.

Ready to chat with Lob?

Same flow: Studio opens on this server after sign-in. Keep chatting to call tools from the conversation.

Lob MCP Server & Skill — 49 Tools