# Lob MCP for AI Agents AI Agent Connect > Lob MCP lets your AI agent handle physical mail. It prints and mails letters, postcards, and checks, while also verifying US and international addresses. You can manage an address book, create HTML templates with merge variables, and track deliveries in real-time. It connects your digital workflow to the physical world. ## Overview - **Category:** marketing-automation - **Price:** Free - **Endpoint:** https://edge.vinkius.com/vk_preview_QGpJ6KHhrS8a6OlK7vmqkJoZPOKxvw7lIUko4Mcm/ai-agent-connect - **Tags:** direct-mail, address-verification, print-automation, postal-services, campaign-management ## Description Managing physical mail usually feels like a bottleneck in a digital workflow. You have to jump between spreadsheets, print labels, and manually mail out checks or postcards. This Connector changes that by letting your AI agent handle the heavy lifting. Instead of you manually typing out addresses or worrying if a ZIP code is correct, your agent can verify data and trigger the actual printing and mailing process. Whether you're sending out marketing postcards, payroll checks, or personalized customer letters, the AI handles the logistics. You can set up reusable templates that pull in specific data points, like names or account numbers, so every piece of mail feels personal. It's one of the many ways Vinkius helps bridge the gap between your software and real-world actions. Your agent can even manage your entire contact list, keeping it clean and updated as you go. It takes the offline part of your business and makes it just as programmable as your online tools. ## Tools ### autocomplete_address Suggest address completions ### create_check Generate and mail a physical check to a recipient. You can include a memo or a custom logo on the check. ### create_letter Send a physical letter using an HTML template with merge variables. This lets you personalize the content for every recipient. ### create_postcard Mail a physical postcard with a custom front and back design. You can use merge variables to include specific messages. ### get_mail_tracking Track a mail piece ### list_postcards See a list of all physical postcards you've sent. You can limit the number of results returned in one go. ### verify_intl_address Verify an international address ### verify_us_address Check if a US address is valid and get the standardized version. It adds missing ZIP+4 codes and fixes formatting errors. ### list_letters View all sent letters along with their status and tracking numbers. It's the best way to audit your mail history. ## Prompt Examples **Prompt:** ``` Verify if 123 Maple Ave, Springfield is a real address and tell me the full format. ``` **Response:** ``` I've verified that address for you. Here are the details: * **Standardized Address:** 123 Maple Ave, Springfield, IL 62704 * **Status:** Deliverable * **ZIP+4:** 62704-1234 I've updated the format to ensure your mail reaches the correct destination. ``` **Prompt:** ``` Send a $200 check to 'Green Garden Supplies' for our monthly maintenance. ``` **Response:** ``` I'll get that check sent out for you. **Check Details:** * **Payee:** Green Garden Supplies * **Amount:** $200.00 * **Memo:** Monthly Maintenance * **Status:** Processing You'll receive a tracking number as soon as it's printed and mailed via USPS. ``` **Prompt:** ``` Mail a postcard to our new customer, Sarah Jenkins, at her home address using our 'Welcome' template. ``` **Response:** ``` I'm sending that welcome postcard now. **Mailing Summary:** * **Recipient:** Sarah Jenkins * **Template:** Welcome_Postcard_v2 * **Personalization:** Included * **Delivery Estimate:** 2-3 business days I'll notify you once the tracking number is available. ``` ## Capabilities ### Send physical mail Have your agent print and mail letters or postcards directly. ### Verify addresses Check if US and international addresses are valid and standardized. ### Automate check payments Create and mail physical checks using bank account details. ### Manage address books Add, list, and delete contacts in a central directory. ### Create mail templates Build reusable HTML designs with merge variables for bulk mailings. ### Track mail status Get real-time updates on delivery dates and tracking numbers. ## Use Cases ### Automated Vendor Payments An accounting agent uses create_check to send a physical check to a vendor as soon as an invoice is approved. ### Personalized Welcome Kits A success agent uses create_letter with a custom template to mail a physical welcome letter to new high-tier customers. ### Bulk Marketing Campaigns A marketing agent uses create_postcard and create_template to send 500 personalized postcards to a specific zip code. ### Address Cleanup A data analyst asks the agent to verify_us_address on a list of 1,000 leads to ensure the mailing list is deliverable. ## Benefits - Eliminate manual printing: Use create_check and create_letter to send mail directly from your app without touching a printer. - Accurate mailing: Use verify_us_address to ensure your mail actually reaches the right person and has the correct ZIP code. - Personalized scale: Use create_template and merge variables to send thousands of unique letters that feel like they were written by hand. - Real-time tracking: Use list_letters and list_postcards to monitor your mailings and get delivery dates without leaving your dashboard. - Centralized contacts: Manage your entire mailing list with create_address and list_addresses to keep your data organized in one place. ## How It Works The bottom line is that your AI agent handles the entire journey from digital data to a physical mailbox. 1. Connect your Lob account to your AI client through Vinkius. 2. Provide the agent with a recipient address and the content or template you want to send. 3. The agent triggers the print and mail process and returns a tracking number. ## Frequently Asked Questions **Can the Lob MCP send physical letters?** Yes, it lets your agent print and mail physical letters directly to any US or international address. **How does the Lob MCP handle address verification?** It checks your addresses against postal databases to ensure they are deliverable and provides the standardized format. **Can I use the Lob MCP to send checks?** Yes, you can automate physical check payments by providing the bank account details and the amount to your agent. **Does the Lob MCP support personalized mail?** It supports HTML templates with merge variables, which lets your agent customize each letter or postcard for the recipient. **How fast is the mailing with Lob MCP?** Most mail is printed, processed, and delivered within 24 hours via USPS integration. **Can I track my mailings?** Yes, your agent can list all sent letters and postcards to give you tracking numbers and expected delivery dates. **What types of physical mail can I send with Lob?** Lob supports three main mail types: Letters (formal correspondence, invoices, notifications with customizable color, double-sided printing), Postcards (marketing campaigns, invitations, reminders in 4x6, 6x9, or 6x11 sizes), and Checks (vendor payments, payroll, refunds, rebates with customizable memo lines and company logos). All mail is printed and mailed within 24 hours via USPS. **How does Lob address verification work?** Lob's address verification validates and standardizes addresses using USPS data. It corrects formatting, adds missing ZIP+4 codes, fixes typos, and confirms deliverability. The service returns a deliverability status: 'deliverable' (valid and deliverable), 'undeliverable' (cannot be delivered), or 'deliverable_unnecessary' (valid but additional info not needed). This reduces returned mail by up to 5% and ensures your mailings reach the correct destination. **Can I use HTML templates for personalized mailings?** Yes! Lob supports HTML templates with merge variables using the Handlebars templating engine. Create a template with placeholders like {{name}}, {{order_number}}, {{delivery_date}}, then pass actual values when creating letters or postcards. This enables personalized, scalable direct mail campaigns. Templates are reusable and can be referenced by ID when creating mailings. You can also embed CSS styling for professional-looking mail designs. **How long does it take for mail to be delivered?** Lob prints and mails all items within 24 hours of creation. Delivery time depends on the mail type selected: USPS First Class Mail typically delivers in 2-5 business days, while USPS Standard Mail takes 3-7 business days. You receive a tracking number for each piece of mail to monitor delivery status. Lob also provides expected delivery dates in API responses for planning purposes. **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.