For AI agents — MCPBundles Directory API
For MCP client apps (human connect):
MCP connect URL: https://mcp.mcpbundles.com/bundle/lob
Skill page: https://www.mcpbundles.com/skills/lob
Tools: 49
Live probe refreshed Nov 6, 2026 · Endpoint host mcp.mcpbundles.com
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.
Live vs test: Keys that start with test_ send sample mail without postage. Keys that start with live_ can be paused while Lob reviews a new account, or when payment is not verified. Test-mode traffic stays available in both cases.
Explore capabilities (49)
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Showing 49 of 49
Showing 49 of 49 tools from the public preview. Connect the server to inspect the full live tool list.
Lob48
Other capabilities1
Delete
write
delete
Universal delete tool that removes ANY Lob resource using smart ID routing with colon-separated format. Supports addresses, templates, template versions, bank accounts, billing groups, buckslips, cards, self-mailers, uploads, campaigns, and creatives. Returns confirmation of deletion. CAUTION: Deletion is permanent and cannot be undone for most resources.
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Lob
Add to your AI client, then sign in once when you connect.
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.
This listing identifies a third-party integration. MCPBundles is not affiliated with, sponsored by, or endorsed by the service or its operator unless stated on this page.
Delete — Universal delete tool that removes ANY Lob resource using smart ID routing with colon-separated format. Supports addresses, templates, template versions, bank accounts, billing groups, buckslips, cards, self-mailers, uploads, campaigns, and creatives. Returns confirmation of deletion. CAUTION: Deletion is permanent and cannot be undone for most resources.
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 mailing campaigns.
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 campaigns.
Lob Create Check — Create and send a Lob check. Required fields: to (address), from_address (address), bank_account (bank_...), amount (dollars). Checks are sent immediately unless send_date is specified. Unsent checks can be cancelled before they enter the mail stream.
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 unless send_date is specified. Unsent letters can be cancelled before they enter the mail stream.
Lob Create Postcard
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.
Standard connector25 free calls every 30 days, then from $19/month
$19 / month
Subject to fair usage limits
— Create and send a Lob postcard. Required fields: to (address), from_address (address), front (template or HTML). Postcards are sent immediately unless send_date is specified. Unsent postcards can be cancelled before they enter the mail stream.
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. Self-mailers are sent immediately unless send_date is specified. Use delete tool to remove self-mailers.
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 details.
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.
Showing the first 25 tools — full list and schemas: Directory API.
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.
MCPBundles is an independent platform built on the open Model Context Protocol standard. MCPBundles is not affiliated with, sponsored by, or endorsed by Anthropic PBC.
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