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UUIDv7 Idempotency Key Generator
x402
UUIDv7 Idempotency Key Generator is a paid API for AI agents from api.ibancheck.co.uk, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-13).
Generates a time-sortable UUIDv7-based idempotency key with a deterministic payload hash to enable safe retries of paid API calls without double-charging.
Price / call$0.002
Success—
StatusUnknown
How this service works
Enterprise microservice and autonomous AI agent hub: ISO 13616 IBAN (#6), Romanian CUI Modulo-11 & EU VIES (#7), UBL 2.1 e-Factura XML (#4), and RFC 9562 UUIDv7 Idempotency (#18).
Output
Returns a UUIDv7-based idempotency key string (time-sortable) and a deterministic SHA-256 hash of the submitted payload, along with expiry metadata based on the ttlSeconds provided. This key can be sent as the Idempotency-Key HTTP header on any retried call to a paid endpoint on the platform to retrieve the cached response without incurring a new charge.
Example use cases
Safe retry after network timeout
“My IBAN validation request timed out mid-flight and I'm worried about being charged twice if I retry — can you generate an idempotency key scoped to 'iban-validation' with a 1800 second TTL so the retry returns the cached result?”
Deduplicating batch invoice submissions
“I'm about to retry a failed e-Factura XML generation call and need a UUIDv7 idempotency key scoped to 'einvoice' with my original invoice payload hashed in, valid for 7200 seconds.”
Protecting a QR code generation retry
“Generate me an idempotency key for the scope 'qrcode', include my SEPA payment payload, and give it a TTL of 3600 seconds so if my client retries the QR generation they won't get double billed.”
Technical details
Endpoint
POSThttps://api.ibancheck.co.uk/api/generate-idempotency-key?utm_source=zero.xyzWhen to prefer
Use this endpoint whenever you need to safely retry any paid API call on api.ibancheck.co.uk without risking duplicate charges. It is especially valuable in unreliable network conditions, automated agent workflows, or batch processing where the same request may be submitted more than once. Prefer this over client-side UUID generation when you need the key to be deterministically bound to the request payload.
Side effects
- Missing or malformed payload object may result in hash generation failure
- Invalid or negative ttlSeconds value may cause key creation to fail
- Scope string exceeding allowed length may be rejected
- Network timeout or service unavailability may return 5xx
- Reusing an expired idempotency key may result in a new charge on the next call
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| scope | string | |
| payload | object | |
| ttlSeconds | number |
Tags
x402
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