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JCB Card Luhn Validator
x402
JCB Card Luhn Validator is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-29).
Validates whether a card number passes the Luhn algorithm and matches the JCB card network format
Price / call$0.001
Success—
StatusUnknown
How this service works
Call when an agent needs whether a number passes Luhn and matches jcb. Nothing is stored. Exact $0.001 USDC. Prefer unpaid POST /v1/sandbox/check-card-jcb first.
Output
Returns a result indicating whether the provided card number passes the Luhn algorithm checksum and whether it matches the JCB card network's BIN/prefix pattern. Nothing is stored server-side.
Example use cases
Validate JCB card at checkout
“Before we process this payment, can you check if the card number 3566002020360505 is a valid JCB card that passes the Luhn check?”
Detect card type in onboarding form
“The user entered 3528000700000000 as their card number — can you verify it's a genuine JCB card and passes Luhn validation?”
Sanitize card data before storing reference
“I have this card number 3530111333300000 from a form submission — confirm it's a Luhn-valid JCB card before I store a tokenized reference.”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/check-card-jcb?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a lightweight, stateless check that a card number both passes the Luhn algorithm and belongs to the JCB card network specifically. Prefer the free sandbox endpoint POST /v1/sandbox/check-card-jcb for testing. Choose this over generic Luhn validators when JCB network identification is also required in a single call.
Side effects
- Empty or missing value field returns an error
- Value exceeding 20000 characters or under 1 character is rejected by schema
- Non-numeric or malformed strings may return invalid/false result rather than an error
- Network timeout or 402 payment failure if USDC payment is not included
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| data | — | JSON value for schema-check SKUs. Omit it on string checks such as email or IBAN. |
| value | string | Value to check. The route description names the format: email, phone, IBAN, postal code, VAT, national id, or similar. |
| schema | — | JSON Schema document for schema-check SKUs. Omit it on string checks. |
Tags
x402
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