Mango Labs

Data Validation APIs

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.

You could build…

Notes already stored with this category in the catalog.

  1. Checkout address cleanup that splits a messy US address into street, city, and ZIP.
  2. A VAT-number check before a European invoice goes out.
  3. A comment box that rejects obvious profanity before the post is saved.
Data ValidationPricing not listed

VATlayer

VAT number validation

You could build… Checkout address cleanup that splits a messy US address into street, city, and ZIP.

API keyHTTPS YesAPI link
Data ValidationPricing not listed

Attestwire

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.

API keyHTTPS YesAPI link
Data ValidationPricing not listed

Lob.com

US Address Verification

You could build… Checkout address cleanup that splits a messy US address into street, city, and ZIP.

API keyHTTPS YesAPI link
Data ValidationPricing not listed

Postman Echo

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.

No authHTTPS YesAPI link
Data ValidationPricing not listed

PurgoMalum

Content validator against profanity & obscenity

You could build… Checkout address cleanup that splits a messy US address into street, city, and ZIP.

No authHTTPS NoAPI link
Data ValidationFree tier, then paid

RevAddress

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.

API keyHTTPS YesAPI link
Data ValidationPricing not listed

SchemaShield

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.

API keyHTTPS YesAPI link
Data ValidationPricing not listed

sthan.io Address Parser

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.

API keyHTTPS YesAPI link
Data ValidationPricing not listed

sthan.io Address Verification

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.

API keyHTTPS YesAPI link
Data ValidationPricing not listed

Temsor

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.

API keyHTTPS YesAPI link
Data ValidationPricing not listed

US Autocomplete

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.

API keyHTTPS YesAPI link
Data ValidationPricing not listed

US Extract

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.

API keyHTTPS YesAPI link
Data ValidationPricing not listed

US Street Address

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.

API keyHTTPS YesAPI link
Data ValidationPricing not listed

VerifNow

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.

API keyHTTPS YesAPI link

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