21 Services from api.aventtech.com

Validates EU VAT numbers in real-time against the European Commission VIES registry, returning validity status and available trader name and address.

Validates and normalizes international phone numbers using libphonenumber, returning validity, country, E.164 format, national/international formats, and line type.

Resolves DNS records (A, AAAA, MX, TXT, CNAME, NS, SOA, CAA, SRV, PTR) for a given hostname using DNS-over-HTTPS, returning records and TTLs.

Converts a 5-field cron expression into a human-readable description and returns the next N upcoming run times in UTC.

Analyzes a password for character classes, entropy bits, strength verdict, and checks it against Have I Been Pwned breach data using k-anonymity (only a hash prefix is sent, never the raw password).

Returns control protocol, transport, TCP/UDP port, connection notes, and field-tested gotchas for professional AV, lighting, shading, and network devices by manufacturer and model.

Validates GTIN-8, GTIN-12 (UPC-A), GTIN-13 (EAN-13), and GTIN-14 barcodes using GS1 MOD-10 check-digit algorithm and identifies the barcode type.

Validates a payment card number's structure via Luhn checksum, detects card brand (Visa/Mastercard/Amex/Discover/Diners/JCB), and extracts BIN and last4 digits — without verifying the card actually exists.

Returns the latest European Central Bank daily reference rate for any supported currency versus EUR, plus supports cross-rate conversion between two non-EUR currencies.

Validates an IBAN using MOD-97 checksum, structural checks, and country-length verification against the IBAN registry, returning validity status, country, and diagnostic details.

Checks whether a domain name is registered or available and returns authoritative RDAP registry data including registrar, dates, nameservers, and status flags.

Calculates IPv4 network properties from a CIDR notation input: network address, broadcast address, netmask, wildcard, usable host range and count, with optional IP membership check.

Converts a hex or rgb() color value into hex, RGB, HSL, approximate relative luminance, and best text contrast color (black or white).

Parses a user-agent string into structured browser, engine, OS, device type/vendor/model, CPU architecture, and bot-likelihood fields.

Validates ISBN-10 or ISBN-13 numbers, returning whether the identifier is valid and its kind

Validates a 12-character ISIN code per ISO 6166, checking structure, Luhn check digit, country code, and extracting the embedded NSIN.

Converts a datetime (or the current moment) from one IANA timezone to another, returning both the UTC instant and local wall clock times.

Checks an email address for RFC syntax validity and live MX/A DNS deliverability via DNS-over-HTTPS, returning a structured verdict on whether the domain can receive mail.

Generates a QR code SVG from any text or URL, with configurable error correction level.

Validates a 17-character Vehicle Identification Number (VIN) per ISO 3779, verifying structure, check digit at position 9, and decomposing WMI/VDS/VIS segments with model-year decoding.

Converts a monetary amount from one ISO 4217 currency to another, returning the exchange rate and converted result