Daily EUR foreign-exchange reference rates (source: European Central Bank). Returns the latest ECB reference rate for any supported currency vs EUR, plus cross-rate conversion between two non-EUR currencies.
# 1. Ask the endpoint what it costs (no payment, no wallet needed): curl -i -X GET 'https://api.aventtech.com/fx' # -> 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/fx'
Endpoint: https://api.aventtech.com/fx. Operated by api.aventtech.com, not by Animica. Price and availability were correct at the last probe on 2026-08-22 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.
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…
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, ret…