Lob.com
PaidLiveLast verified 24 Sept 2026
Verifies, autocompletes and standardizes US mailing addresses, plus ZIP and reverse-geocode lookups.
Example request
curl -s -u $API_KEY: -X POST https://api.lob.com/v1/us_verifications -d 'primary_line=210 King St' -d 'city=San Francisco' -d 'state=CA' -d 'zip_code=94107'
Free tier, in plain English
No free tier. Paid self-serve plans start around $25 a month for 1,000 verification calls, with per-call pricing above that.
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