Validate a credit card or payment card number and detect its brand. Checks the Luhn checksum and identifies Visa, Mastercard, Amex, Discover, Diners or JCB, returning the BIN and last four digits. Structural card number validation for checkout forms and fraud pre-checks (does not verify the card exists or has funds).
# 1. Ask the endpoint what it costs (no payment, no wallet needed): curl -i -X GET 'https://api.aventtech.com/validate/card' # -> HTTP/1.1 402 Payment Required # the response carries the price, asset and pay-to address. # 2. Pay and retry with any x402 client: npx x402-fetch 'https://api.aventtech.com/validate/card'
Endpoint: https://api.aventtech.com/validate/card. Operated by api.aventtech.com, not by Animica. Price and availability were correct at the last probe on 2026-08-27 and are set by the operator, who may change them.
Color conversion: hex or rgb() input to hex, RGB, HSL, approximate relative luminance and best text contrast (black/white).
Convert an amount between currencies and get the exchange rate. Converts between 30+ currencies (USD, EUR, GBP, JPY and more) using daily European Central Bank …
Timezone conversion between IANA zones: convert a datetime (or now) from one zone to another, returning UTC instant and local wall times.
Cron expression explainer: human-readable description plus the next run times (UTC) for standard 5-field cron syntax including ranges, lists and steps.
Daily EUR foreign-exchange reference rates (source: European Central Bank). Returns the latest ECB reference rate for any supported currency vs EUR, plus cross-…
QR code generation returning clean scalable SVG: any text/URL up to 1800 chars, selectable error-correction level (L/M/Q/H).
Password strength and breach inspection: character classes, entropy bits, verdict, and Have-I-Been-Pwned breach count via k-anonymity (only a truncated hash pre…
AV/IT device integration facts for AI agents writing drivers and integrations: control protocol family, transport, TCP/UDP port, connection notes and field-test…
Look up DNS records for any hostname: query A, AAAA, MX, TXT, CNAME, NS, SOA, CAA, SRV and PTR records with TTLs over DNS-over-HTTPS. Check mail configuration (…
Look up a domain name and check whether it is registered or available. Queries authoritative registry data via RDAP to return registration status, the registrar…
IPv4 CIDR calculator: network, broadcast, netmask, wildcard, usable host range and count, plus optional contains-IP membership check.
User-agent string parsing: browser, engine, OS, device type/vendor/model, CPU architecture, plus a likely-bot flag. For agents analyzing logs or adapting respon…