Know the card before you process it.
Card network, type, issuing bank, and country — from the first 6–8 digits of any payment card, in a single API call.
Trusted by teams at
500k+ BINs from multiple aggregated sources.
BIN Lookup covers Visa, Mastercard, Amex, Discover, UnionPay, and more. Every record includes card network, type, level, issuing bank name and URL, issuing country, prepaid flag, and a confidence score. Both 6-digit and 8-digit BINs are supported per ISO 7812-1:2017.
{
"bin": "424242",
"scheme": "visa",
"card_type": "credit",
"card_level": "classic",
"issuer_name": "Chase",
"country_code": "US",
"prepaid": false,
"confidence": 0.92
}
One GET request. No body, no parsing.
Pass the BIN in the URL path. Your API key in the header. No SDK, no setup, no request body. The response is flat JSON — read it directly without unwrapping nested structures.
GET /v1/finance/bin/424242
Host: requiems.xyz
requiems-api-key: YOUR_API_KEY
Built for payment flows.
BIN Lookup fits anywhere card metadata matters — checkout, fraud, and ops alike.
Show the card logo as the user types
Detect the card network from the first 6 digits and render the correct brand logo in real time — before the user finishes entering the card number.
Block high-risk card origins
Reject or flag cards issued in restricted countries at the payment step, before any charge is attempted.
Validate card type at checkout
Some products only accept debit or only accept credit. Check card_type at entry and show a clear message before the user hits submit.
Flag prepaid cards for subscription flows
Prepaid cards often fail on recurring charges. Detect them upfront and prompt the user to use a different card.
Enrich payment records with issuer data
Attach bank name and country to every transaction record for reporting, reconciliation, and dispute workflows.
Score transaction risk by BIN
Combine BIN metadata with other signals — IP location, device fingerprint — to build a composite fraud score per transaction.
Use together with complementary APIs.
BIN Lookup works even better when paired with other Requiems APIs.
Cross-reference the card's issuing country with the user's IP location to flag mismatches and reduce chargebacks.
Validate both card and bank account details in the same onboarding flow for full payment instrument coverage.
Combine payment card verification with email validation to build a stronger fraud signal at signup or checkout.
Frequently Asked Questions
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One API key. BIN Lookup, plus 50+ other APIs across validation, finance, networking, and more.