Attestwire
Validate EN 16931 e-invoices: XRechnung, ZUGFeRD, Factur-X, Peppol BIS
apiKeyHTTPSCORS
Free Data Validation APIs
16 free public Data Validation APIs for developers. 15 support HTTPS, 5 allow CORS from the browser and 2 need no API key.
Showing 16 of 16 APIs
apiKeyHTTPSCORS ?
apiKeyHTTPSCORS ?
No authHTTPSCORS ?
No authNo HTTPSCORS ?
RevAddress
US address standardization, congressional and state legislative districts, Census data; free tier
apiKeyHTTPSNo CORS
apiKeyHTTPSCORS ?
apiKeyHTTPSNo CORS
sthan.io Address Parser
Parse freeform US addresses into structured fields (house number, street, unit, city, state, ZIP)
apiKeyHTTPSNo CORS
sthan.io Address Verification
Validate and standardize US addresses, with ZIP+4 and deliverability status
apiKeyHTTPSNo CORS
Temsor
Validates Turkish national ID, tax number, IBAN, phone, plate and parses addresses
apiKeyHTTPSCORS
apiKeyHTTPSCORS
apiKeyHTTPSCORS
apiKeyHTTPSCORS
apiKeyHTTPSCORS ?
VerifNow
Validates email, phone, IBAN, EU VAT against VIES, and Canadian, Spanish and US national IDs
apiKeyHTTPSNo CORS
Data Validation API FAQ
How many free Data Validation APIs are there?
There are 16 free public Data Validation APIs in the directory. 15 support HTTPS, 5 are confirmed to allow CORS and 2 need no API key.
Which Data Validation APIs work without an API key?
2 Data Validation APIs need no authentication, including Postman Echo and PurgoMalum. You can call them straight away without signing up.
Which Data Validation APIs can I call from the browser?
APIs with CORS enabled can be called directly from front-end JavaScript. In Data Validation, that includes Attestwire, Temsor, US Autocomplete and US Extract.