Lob's APIs empower technology-focused companies to build powerful applications to control and scale their physical mailings, and ensure address deliverability. Instead of working through the complexities of direct mail or managing mail infrastructure, you can instantly access commercial grade printing & mailing infrastructure on-demand and at scale via a simple RESTful API.

View our API reference documentation:

• Print & Mail API
  • Mail form factors
    • Postcards
    • Self-mailers
    • Letters
    • Checks
  • HTML base layout templates & designs
  • Addresses 
  • Bank accounts (for funding check runs)
• Address Verification API
  • US Verification
  • US Autocompletion
  • Reverse Geocode Lookups
  • Zip Lookups
  • International Verification
• Campaigns API
  • Campaigns
  • Creatives
  • Uploads
• Webhooks
  • Webhooks
  • Events
• Special features

Also check out other sections on:

• Authentication & API keys‍
• Error reference‍ 
• SDKs & tools‍ 
• Versioning & changelog‍