Lob Connector for AI agents.

Yes, it lets your agent print and mail physical letters directly to any US or international address.

It checks your addresses against postal databases to ensure they are deliverable and provides the standardized format.

Yes, you can automate physical check payments by providing the bank account details and the amount to your agent.

It supports HTML templates with merge variables, which lets your agent customize each letter or postcard for the recipient.

Most mail is printed, processed, and delivered within 24 hours via USPS integration.

Yes, your agent can list all sent letters and postcards to give you tracking numbers and expected delivery dates.

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.

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.

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.

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.

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

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

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