BIN Lookup API: Developer Integration Guides
Integrating BIN lookup into your payment application? We’ve created comprehensive guides for every major programming language, each with production-ready code, error handling, and real-world examples.
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What’s in Each Guide
- ✓ Step-by-step account and API key setup
- ✓ Simple 'hello world' example to verify your setup
- ✓ Production-ready client with full error handling
- ✓ All HTTP status codes covered (400, 401, 402, 403, 404, 429, 502)
- ✓ Async/concurrent request patterns
- ✓ Real-world payment validation example
- ✓ Best practices checklist
Quick API Overview
Endpoint: POST https://api.binlookupapi.com/v1/bin
Authentication: Bearer token in Authorization header
Request:
{ "number": 42467101 }Response:
{
"data": {
"bin": "42467101",
"scheme": "visa",
"funding": "debit",
"brand": "VISA",
"category": "CLASSIC",
"country": { "code": "PL", "name": "POLAND" },
"issuer": { "name": "ING BANK SLASKI SA", "website": null, "phone": null },
"currency": "PLN",
"prepaid": false,
"commercial": false
}
}Create a free account to get 500 requests/day with mock responses. Perfect for building and testing your integration before upgrading to production data.
Integration Best Practices
When to call the API: Call as soon as the user enters 6-8 digits of their card number. This enables real-time validation and card type detection.
Error handling: Always handle all error cases gracefully. For payment flows, consider a “fail open” strategy where you allow transactions when the API is unavailable rather than blocking all payments.
Timeouts: Set reasonable timeouts (10 seconds recommended). Don’t let BIN validation block your checkout flow indefinitely.
Environment variables: Never hardcode API keys. Use environment variables or secure configuration management.
Need Help?
- Full API Reference - Complete endpoint documentation
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- Contact Support - We’re here to help with your integration
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