CBU Validator

CBU (Argentine bank account number) · Issuer: BCRA. Direct debits, supplier payouts, marketplace withdrawals and transfers.

Format

22 digits in two blocks: 8 (bank 3 + branch 4 + check) and 14 (account 13 + check).

Check-digit algorithm

1. Block 1: weights 7,1,3,9,7,1,3 on the first 7 digits.
2. Check = (10 − sum mod 10) mod 10, must equal digit 8.
3. Block 2: weights 3,9,7,1,3,9,7,1,3,9,7,1,3 on the 13 account digits.
4. Same formula; must equal digit 22.

Use cases

Direct debits, supplier payouts, marketplace withdrawals and transfers.

Code examples

# curl (RapidAPI)
curl -X POST "https://validalatam.p.rapidapi.com/validate" -H "Content-Type: application/json" \
  -H "X-RapidAPI-Key: $RAPIDAPI_KEY" -H "X-RapidAPI-Host: validalatam.p.rapidapi.com" \
  -d '{"type":"AR_CBU","value":"0145806800001618203537"}'

# Python
import requests
r = requests.post("https://validalatam.p.rapidapi.com/validate", json={"type": "AR_CBU", "value": "0145806800001618203537"},
                 headers={"X-RapidAPI-Key": KEY, "X-RapidAPI-Host": "validalatam.p.rapidapi.com"})
print(r.json()["valid"], r.json()["formatted"])

// JavaScript (fetch)
const r = await fetch("https://validalatam.p.rapidapi.com/validate", { method: "POST",
  headers: { "Content-Type": "application/json", "X-RapidAPI-Key": KEY, "X-RapidAPI-Host": "validalatam.p.rapidapi.com" },
  body: JSON.stringify({ type: "AR_CBU", value: "0145806800001618203537" }) });
const { valid, formatted, error } = await r.json();

# Response
{
  "valid": true,
  "type": "AR_CBU",
  "country": "AR",
  "input": "0145806800001618203537",
  "normalized": "0145806800001618203537",
  "formatted": "01458068 00001618203537"
}

API plans on RapidAPI

Free plan to get started; paid plans for production volume and batch validation (up to 1000 per request).

See plans on RapidAPI →

FAQ

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