US Street Address
APIUS street address validation and data enrichment API
Overview
The US Street Address API provides RESTful endpoints to validate, standardize, and enrich US postal addresses. Key endpoints accept address components (street, city, state, ZIP) via GET/POST requests, returning JSON responses with corrected addresses, ZIP+4 codes, carrier route details, and delivery point validation (DPV) statuses. Use cases include ensuring accurate e-commerce shipping addresses, cleaning CRM contact data, verifying checkout addresses to reduce delivery errors, and complying with postal regulations for bulk mailings.
Example Integration (JavaScript)
fetch('https://www.smarty.com/docs/cloud/us-street-api')
.then(res => res.json())
.then(data => console.log(data))
.catch(err => console.error(err)); Key Features
- RESTful interface
- JSON response format
- Address validation & standardization
- ZIP+4 code enrichment
- Delivery Point Validation (DPV)
- Carrier route data append
Frequently Asked Questions
? Is the US Street Address API free to use?
Yes, it offers a freemium model with a free tier for limited requests; paid plans are available for higher volume and advanced features.
? Does it require an API Key?
Yes, authentication via an API key is mandatory for all requests to access the API.
? What is the response format?
All responses are in JSON format, including validated address details, enrichment data, and validation status codes.
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Tool Info
Pros
- ⊕ Highly accurate USPS-aligned data
- ⊕ Fast real-time processing
- ⊕ Enriches missing address components
- ⊕ Supports bulk address validation
Cons
- ⊖ Rate-limited free tier
- ⊖ Requires API key authentication
- ⊖ Limited to US addresses only
- ⊖ Premium pricing for high-volume usage