Data Validation APIs.
A validation API answers one question per field: is this real, and is it well formed. Emails, phone numbers, VAT and IBAN numbers, postcodes — checked against live registries and format rules before the bad record reaches your database.
Also called a verification API, data quality API or data cleansing API54 services in this categoryData Validation APIs
54 servicesValidate IBAN Checksum API
Validate an IBAN checksum from a query parameter and catch invalid bank account numbers before payments, payouts, or onboarding.
Dosvak LLCParse & Normalize US Address API
Address parsing API for US addresses: send one address line, get house number, street, city, state, ZIP and a normalized string. Free tier, no card.
Dosvak LLCSearch US Address API
Search address matches from a text query, with optional country filtering and result limits. Built for autocomplete, lookup, and validation.
Dosvak LLCBasic Language Detection API
Detect the language of a text string with a single lightweight call. Returns the detected language for routing, tagging, and localization work.
Dosvak LLCPhone Number Formatter API
Parse a phone number into E.164, international, and national formats. Returns validity plus country and region details for storage and display.
Dosvak LLCEmail Deliverability Score API
Check an email for syntax, MX records, and disposable domains. Returns a score, quality level, and boolean checks to filter bad addresses early.
Dosvak LLCDisposable Email Checker API
Check whether an email uses a known disposable domain. Returns the email, domain, and a disposable boolean for signup gating and fraud filtering.
Dosvak LLCEmail MX Lookup API
Check whether an email domain has valid MX records. Returns the email, domain, has_mx flag, and record list for deliverability and list hygiene.
Dosvak LLCPhone Carrier Lookup API
Phone number lookup API: send a number, get back the carrier, geographic region, time zones, and number type as JSON. Free tier, no card.
Dosvak LLCCheck Spelling API
Send a word or phrase and get back each misspelled word with a suggested fix. A lightweight GET spell check API for search, forms and live input. Try Free.
Dosvak LLCCheck Password Strength API
Score a password by length, complexity, and common-password checks. Returns a score, maximum, level, and per-rule results for signup and reset.
Dosvak LLCGenerate Fake Address API
Generate 1 to 50 fake street addresses as plain strings. Built for test data, sample forms, and staging datasets without touching real records.
Dosvak LLCWhich Data Validation API do you need?
The question you arrived with, and the endpoint that answers it.