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GoCreative Luhn Checksum Validator
x402
GoCreative Luhn Checksum Validator is a paid API for AI agents from api.gocreativeai.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-08).
Validates a numeric string using the Luhn algorithm and returns whether it's valid, along with detected card brand and number length
Price / call$0.005
Success—
StatusUnknown
How this service works
Keyless, pay-per-call compliance & regulated-data API for AI agents — OFAC wallet + sanctions/PEP + KYB screening, SEC filings, FRED economics, FDA recalls, federal awards, plus continuous monitoring. USDC on Base/Solana via x402, native MCP. No API key, no signup.
Output
Returns a JSON object with a boolean 'valid' field, the source algorithm ('Luhn checksum'), detected 'card_brand' (e.g. Visa, Mastercard), and 'number_length' (e.g. 16)
Example use cases
Example prompt
“Can you check if the card number 4532015112830366 is valid — does it pass the Luhn checksum, and what card brand is it?”
Technical details
Endpoint
GEThttps://api.gocreativeai.com/v1/validate/luhn/%7Barg%7DWhen to prefer
Use this endpoint when you need to validate a single card number's Luhn checksum and simultaneously identify the card brand in one call, without requiring an API key or signup, paying only $0.005 USDC per call via x402 on Base
Side effects
- Non-numeric input may return an error or invalid result
- Empty or missing 'input' query parameter returns a 400 error
- Very long or very short strings may not match any known card brand
- Network or payment failure if USDC balance is insufficient for the $0.005 fee
Input
{
"arg": "4532015112830366"
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Output
{
"valid": true,
"source": "Luhn checksum",
"card_brand": "Visa",
"number_length": 16
}Tags
x402
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