VATlayer
VAT number validation
You could build… Checkout address cleanup that splits a messy US address into street, city, and ZIP.
Mango Labs
Public API idea board. Data Validation is one of 51 categories in the public-apis GitHub list. This page lists all 14 APIs filed under Data Validation in the fetch on 2026-09-30 (README commit 8939d46). Descriptions are that list’s own lines, not rewrites. A pricing label is shown only when those lines state a price; otherwise it says pricing not listed.
Notes already stored with this category in the catalog.
VAT number validation
You could build… Checkout address cleanup that splits a messy US address into street, city, and ZIP.
Validate EN 16931 e-invoices: XRechnung, ZUGFeRD, Factur-X, Peppol BIS
You could build… Checkout address cleanup that splits a messy US address into street, city, and ZIP.
US Address Verification
You could build… Checkout address cleanup that splits a messy US address into street, city, and ZIP.
Test api server to receive and return value from HTTP method
You could build… Checkout address cleanup that splits a messy US address into street, city, and ZIP.
Content validator against profanity & obscenity
You could build… Checkout address cleanup that splits a messy US address into street, city, and ZIP.
US address standardization, congressional and state legislative districts, Census data; free tier
You could build… Checkout address cleanup that splits a messy US address into street, city, and ZIP.
Read-only preflight for breaking schema changes and downstream query impact
You could build… Checkout address cleanup that splits a messy US address into street, city, and ZIP.
Parse freeform US addresses into structured fields (house number, street, unit, city, state, ZIP)
You could build… Checkout address cleanup that splits a messy US address into street, city, and ZIP.
Validate and standardize US addresses, with ZIP+4 and deliverability status
You could build… Checkout address cleanup that splits a messy US address into street, city, and ZIP.
Validates Turkish national ID, tax number, IBAN, phone, plate and parses addresses
You could build… Checkout address cleanup that splits a messy US address into street, city, and ZIP.
Enter address data quickly with real-time address suggestions
You could build… Checkout address cleanup that splits a messy US address into street, city, and ZIP.
Extract postal addresses from any text including emails
You could build… Checkout address cleanup that splits a messy US address into street, city, and ZIP.
Validate and append data for any US postal address
You could build… Checkout address cleanup that splits a messy US address into street, city, and ZIP.
Validates email, phone, IBAN, EU VAT against VIES, and Canadian, Spanish and US national IDs
You could build… Checkout address cleanup that splits a messy US address into street, city, and ZIP.
Same fetch, every category page.