# gateway.apiosk.com Financial Identifiers Card Validator

> gateway.apiosk.com Financial Identifiers Card Validator is a paid API for AI agents from gateway.apiosk.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).

Validates a credit/debit card number and returns the BIN, brand, last 4 digits, and validity status

## Facts

- Endpoint: POST https://gateway.apiosk.com/financial-identifiers/validate/card
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/gateway-apiosk-com-financial-identifiers-card-validator-7602add2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_8ynxw-oOsJrCF13B0gstw

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability gateway-apiosk-com-financial-identifiers-card-validator-7602add2 -d '<json body>'
```

Example prompt: Can you validate this card number for me — 4111111111111111 — and tell me whether it's valid, what brand it is, and what the BIN is?

## When to prefer this

Use this endpoint when you need to validate a payment card number before processing or storing it, identify the card brand and BIN programmatically, or verify card format in a checkout or fraud-screening workflow. It is a simple, low-cost per-call service ideal for real-time card validation at $0.02 USDC per call.

## Known failure modes

- Invalid or malformed card number returns valid: false
- Missing card field in request body causes a 400 or error response
- Non-numeric characters in card number may cause parsing errors
- Very short or truncated card numbers may not resolve a BIN

## How this service works

Validate a payment card number with Luhn and classify the network from bundled static BIN range rules.

## Output

Returns a JSON object with ok status, the BIN (first 6-8 digits), card brand (e.g. visa, mastercard), last 4 digits of the card, and a boolean valid flag indicating whether the card number passes validation.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/gateway-apiosk-com-financial-identifiers-card-validator-7602add2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from gateway.apiosk.com](https://www.zero.xyz/host/gateway.apiosk.com/llms.txt)