x402 Forge

Checks and payment terms on this page refer to the first endpoint's example. Other endpoints have not been checked individually.

Base URLhttps://forge.fizzl.eu/p

• GET/iban-nl—No price listedValidate an IBAN with the mod-97 checksum and country length, and name the Dutch bank for NL IBANs.
  1 parameter and an example

  • ibanquery, requiredNL91 ABNA 0417 1643 00IBAN, spaces allowed

  curl -i 'https://forge.fizzl.eu/p/iban-nl?iban=NL91+ABNA+0417+1643+00'

• GET/postcode-nl—No price listedNormalise a Dutch postcode to '1234 AB' and check its format, including letter pairs that are never issued (SA, SD, SS). Format check only, no address lookup.
  1 parameter and an example

  • postcodequery, required2105pdPostcode in any spacing or case

  curl -i 'https://forge.fizzl.eu/p/postcode-nl?postcode=2105pd'

• GET/telefoon-nl—No price listedNormalise a Dutch phone number to E.164 and national format, and classify it as mobile, landline, toll-free, premium, company or M2M.
  1 parameter and an example

  • numberquery, required06-12345678Phone number in any common Dutch notation

  curl -i 'https://forge.fizzl.eu/p/telefoon-nl?number=06-12345678'

• GET/werkdagen-nl—No price listedCount Dutch working days between two dates, or add N working days to a date, skipping weekends and Dutch public holidays (Koningsdag, Easter, Ascension, Whit Monday, Christmas; Liberation Day every 5 years by default).
  5 parameters and an example

  • addquery3Working days to add (negative = go back)
  • endqueryEnd date YYYY-MM-DD (counts days after start up to and including end)
  • startquery, required2026-12-23Start date YYYY-MM-DD
  • goede_vrijdagqueryTreat Good Friday as a holiday
  • bevrijdingsdagqueryWhen Liberation Day (5 May) is a day off

  curl -i 'https://forge.fizzl.eu/p/werkdagen-nl?add=3&start=2026-12-23'

A dash means the listing gives no price or method. {Braces} mark a value you fill in. Copy buttons copy an example URL.