ambolt
Menu

All endpoints

IBAN Validator: Checksum, Length and Country Check

Validate an IBAN offline: ISO 13616 checksum (mod 97), registered length for the country, and a normalised and grouped format. Does not check that the account exists.

x402: $0.003 per callMCP tool: iban_validate

Input

ParameterTypeDefaultDescription
iban *stringIBAN, spaces allowed.

* required

Source and freshness

Source and licence
Stated in every response (field source).
Last verified
2026-10-03 (hourly check against the live source)

Use it

HTTP (x402)

curl -i "https://api.ambolt.dev/v1/iban-validate?iban=DK50+0040+0440+1162+43"

Returns 402 Payment Required with the price until an x402 payment is attached; @x402/fetch does this for you. See Get started.

MCP

{ "mcpServers": { "ambolt": { "url": "https://api.ambolt.dev/mcp" } } }
# then call the tool: iban_validate

Apify

Not published as an Actor yet.

Example response

{
  "input": "DK50 0040 0440 1162 43",
  "normalized": "DK5000400440116243",
  "checkedAt": "2026-10-02T21:35:47.671Z",
  "valid": true,
  "country": "DK",
  "length": 18,
  "countryKnown": true,
  "grouped": "DK50 0040 0440 1162 43",
  "checkDigits": "50",
  "bban": "00400440116243"
}

Good to know

Guides