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Agent Delivery Dedupe Key
x402
Agent Delivery Dedupe Key is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-13).
Derives a stable, non-secret deduplication key from operation, item identity, and version to prevent duplicate agent deliveries before paying or accepting an x402 result.
Price / call$0.001
Success—
StatusUnknown
How this service works
Agent Delivery Dedupe Key: Agent Delivery Dedupe Key derives a stable non-secret key from operation and caller item identity from bounded caller-supplied values without an external provider. Call Agent Delivery Dedupe Key before paying for or accepting an x402 or agent delivery assembled from caller-supplied challenge and result metadata. Returns contract-specific checks, normalized evidence, mismatch reasons, and an explicit acceptance or rejection status for Agent Delivery Dedupe Key as versi…
Output
Returns a stable derived deduplication key, normalized evidence from the supplied inputs, contract-specific validation checks, any mismatch reasons, and an explicit acceptance or rejection status indicating whether the delivery should be accepted or rejected.
Example use cases
Prevent duplicate x402 payment
“I'm about to pay for an agent delivery via x402 — can you compute the dedupe key for operation 'data-extract', item_id 'doc-4421', version 'v1' so I can confirm this isn't a replay before I send payment?”
Idempotency guard for agentic pipeline
“Before my pipeline accepts the next step's result, derive a stable dedupe key for operation 'summarize', item_id 'article-887', version 'v3' so I can detect if this result was already processed.”
Validate uniqueness of delivered agent result
“Check whether this agent result is a duplicate by computing the dedupe key for operation 'translate', item_id 'file-2019', version 'v1' and tell me the acceptance status and any mismatch reasons.”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/agent-delivery-dedupe-keyWhen to prefer
Use this endpoint when you need a lightweight, stateless, deterministic deduplication key derived entirely in-memory from caller-supplied values — no external state or provider required. Prefer it over custom hashing logic when operating in x402 or agentic delivery contexts where replay prevention and idempotency are critical before committing payment.
Side effects
- Missing required fields (item_id, operation, or version) result in validation errors
- Inputs exceeding maxLength 8192 characters may be rejected
- Malformed request body returns 400 error
- Service unavailability returns 5xx error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| item_id | string | Item Id supplied to Agent Delivery Dedupe Key; used only for this bounded calculation and processed in memory without retention. |
| version | string | Version supplied to Agent Delivery Dedupe Key; used only for this bounded calculation and processed in memory without retention. |
| operation | string | Operation supplied to Agent Delivery Dedupe Key; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"key": "aef5fced30649f2bf87dbdca6b8a18b6cee2d4e93cc355def6ceb9e4638dba86",
"fields": [
"item_id",
"operation",
"version"
],
"secret": false
},
"schema": "delx/util-agent-delivery-dedupe-key/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "3d156ee2c31bc84cd4cda4a16096876258b2cc3925b827946fff028c0cbff32b",
"external_calls": 0
},
"operation": "delivery_contract:agent_delivery_dedupe_key"
}
}Tags
x402
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