Card & Payment Validation Suite

Card & Payment Validation Suite — Validate payment cards with one API: check card numbers with Luhn and scheme detection, run a second card validator, look up card BINs, and validate IBANs and routing numbers.

💳 Rules-based — NOT AI

🚀 Newcomer launch pricing — limited-time introductory rates while we earn our first reviews.

Built for payments, checkout, and fintech developers, fraud teams.

Why this exists

Validating cards and bank details at checkout means a card validator, a BIN lookup, and a bank-detail validator from different vendors.

What you get

One API key validates cards, looks up BINs, and validates bank details — the payment-validation layer.

Endpoints (5 total)

• POST /v1/card/validate
• POST /v1/card/validate-credit
• POST /v1/card/bin-lookup
• POST /v1/iban/validate
• POST /v1/routing/validate

Sample request

curl -X POST https://api-card-suite.knowlez.com/v1/card/validate -H "X-API-Key: <your-key>" -H "Content-Type: application/json" -d '{}'

Pricing

• Starter — $9/mo · 5,000 ops included · $0.003/op overage
• Pro — $29/mo · 50,000 ops included · $0.002/op overage
• Scale — $99/mo · 500,000 ops included · $0.0008/op overage

Swagger / OpenAPI: api-card-suite.knowlez.com/docs