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POST

Overview

Checks one U.S. address and returns whether it is deliverable, a deliverability code and the standardised address. Free. Changes nothing. A preview validates both addresses itself and refuses an undeliverable one with 422 address_not_deliverable. Call this first to catch a bad address before uploading artwork.

Authentication

X-Agent-ID plus a signed x-agent-proof with scope: "write", or an access token. See proof authentication. 60 requests a minute per agent.

Request Body

string
required
Recipient name (1-100 characters)
string
required
Street address (1-200 characters)
string
Apartment, suite or unit
string
required
City
string
required
Two-letter state code, e.g. CA
string
required
ZIP code, 5 digits or ZIP+4
string
Only US

Response

boolean
true when mail can be delivered to the address
string
deliverable or deliverable_unnecessary_unit when deliverable; otherwise a code saying why not
object
The standardised address, in the same shape as the request. The address as sent when it is undeliverable.