validate

Validate an ISIN (International Securities Identification...

Validate an ISIN (International Securities Identification Number, ISO 6166): 2-letter country prefix + 9-char NSIN + Luhn check digit. Returns {valid, isin, country, nsin, embeddedCusip (for US/CA), checkDigit, reason}. Catches transposed characters in security master data that a regex misses. Structure + checksum only.

get/api/validate/isin

Request

  • Base URL: https://2s.io
  • URL: https://2s.io/api/validate/isin
  • Auth: API key in header PAYMENT-SIGNATURE

Query parameters

isinstring required

ISIN.

trial1

Try before you buy. Set to 1 for one free real call per endpoint per hour — no wallet or payment needed — to verify the endpoint before paying. Equivalent to sending the "X-2s-Trial: 1" request header. Listed only on operations that offer a trial; the others always answer 402.

Response

(unresolved $ref)

Changes

No recorded changes to this operation across all 1 revision of this API.