Lob.com

API

US Address Verification & Validation API

Overview

Lob.com API provides RESTful endpoints for US address verification, validation, and standardization. Key endpoints include /v1/verify for real-time checks, returning JSON responses with deliverability status, ZIP+4 codes, and carrier route details. It supports batch verification for bulk lists, ideal for e-commerce platforms reducing shipping errors, logistics tools generating accurate labels, and businesses automating direct mail campaigns. The API integrates with Shopify and Zapier, enabling seamless workflow integration. Responses are structured JSON, ensuring easy parsing into applications.

Example Integration (JavaScript)

script.js JS


fetch('https://lob.com/')
  .then(res => res.json())
  .then(data => console.log(data))
  .catch(err => console.error(err));

Key Features

RESTful API
JSON Response Format
US Address Verification
Batch Processing
E-commerce Integrations

Frequently Asked Questions

? Is Lob.com API free to use?

Yes, Lob.com offers a free tier with 100 address verifications per month. Paid plans are available for higher volume needs.

? Does it require an API Key?

Yes, you need to sign up for an account to obtain an API key for authentication.

? What is the response format?

The API returns structured JSON responses, including address details, deliverability status, and standardized formatting.

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Tool Info

Pricing Freemium

Category Data Validation

Platform Public API

Pros

⊕ Highly Accurate US Address Checks
⊕ Easy-to-Use Endpoints
⊕ Free Tier Available
⊕ Batch Verification Support
⊕ Zapier/Shopify Integrations

Cons

⊖ Rate Limits on Free Tier
⊖ Paid Plans for High Volume
⊖ US-Only Focus
⊖ No Free Tier SLA