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Delx Commerce — Idempotency Fingerprint API
x402
Delx Commerce — Idempotency Fingerprint API is a paid API for AI agents from commerce.delx.ai, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-01).
Generates a deterministic SHA-256 fingerprint from a scoped JSON payload to enable idempotency checking across agent operations
Price / call$0.003
Success—
StatusUnknown
How this service works
Pay-per-result APIs for agents. No signup. Exact price. Verifiable delivery. USDC on Base + Solana via x402.
Output
Returns a JSON object containing the SHA-256 fingerprint string computed from the payload values, the caller-defined scope, the algorithm name ('sha256'), and the schema version ('delx/util-idempotency-fingerprint/v1'). The original payload values are not retained or returned, only the hash.
Example use cases
Deduplicating agent reward events
“I'm issuing loyalty points to users and I need to make sure I never credit the same event twice — can you fingerprint this payload under the 'loyalty' scope: {"user_id": "u789", "event": "referral", "points": 100}?”
Idempotent payment intent tracking
“Before submitting a payment, fingerprint this order payload under the scope 'payments' so I can check later if this exact order was already submitted: {"order_id": "ord_4421", "amount": 49.99, "currency": "USD"}.”
Deduplicating webhook deliveries
“I'm receiving webhooks that might arrive more than once — fingerprint this event under the 'webhooks' namespace so I can skip reprocessing if I've seen it before: {"event_type": "order.completed", "order_id": "88321", "timestamp": "2024-06-01T12:00:00Z"}.”
Technical details
Endpoint
POSThttps://commerce.delx.ai/api/v1/x402/idempotency-fingerprint?utm_source=zero.xyzWhen to prefer
Choose this endpoint when an AI agent needs to produce a deterministic, tamper-evident fingerprint of a structured JSON payload for deduplication or idempotency enforcement — especially in agentic workflows where the same action might be triggered multiple times. Prefer it when you need a scoped, stable identifier that doesn't require storing the original payload and want pay-per-use pricing with no account setup. It is particularly suited for agent-native infrastructure (x402 micropayment protocol, USDC on Base/Solana) where traditional API key management is impractical.
Side effects
- Missing or malformed payload object returns a validation error
- Invalid or missing scope string may cause fingerprint namespace collision or rejection
- Network timeout from micropayment processing delay
- Payload too large may exceed processing limits
- Non-JSON payload values that cannot be deterministically serialized may produce inconsistent fingerprints
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| scope | string | Caller-owned namespace string mixed into the fingerprint. |
| payload | object | JSON payload to fingerprint; values are hashed, not retained. |
Output
Schema · Response
{
"type": "json",
"example": {
"scope": "loyalty",
"schema": "delx/util-idempotency-fingerprint/v1",
"algorithm": "sha256",
"fingerprint": "dc22b29600e074df71fc0f9b0260185e822b228cca615d37992a31dc14eb8f45",
"values_returned": false
}
}Tags
x402
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