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X402 Delivery Latency Check
x402
X402 Delivery Latency Check is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).
Validates observed delivery latency against a buyer-defined SLA threshold and returns an explicit accept/reject status with mismatch reasons
Price / call$0.001
Success—
StatusUnknown
How this service works
X402 Delivery Latency Check: X402 Delivery Latency Check checks observed delivery latency against a buyer SLA from bounded caller-supplied values without an external provider. Call X402 Delivery Latency Check 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 X402 Delivery Latency Check as versioned determ…
Output
Returns a versioned, deterministic validation result including an explicit accept or reject status, contract-specific check outcomes, normalized evidence of the latency comparison, and human-readable mismatch reasons explaining why the delivery passed or failed the SLA threshold.
Example use cases
Pre-payment latency gate for x402
“I just received an x402 agent delivery that took 850 ms — my SLA says the maximum is 600 ms. Check whether I should accept or reject it before I authorize payment.”
Automated SLA compliance check
“After each agent task completes, verify the delivery latency of 210 ms against my buyer SLA maximum of 400 ms and give me the accept/reject status plus any mismatch reasons.”
Latency budget enforcement for agentic pipeline
“My pipeline received a result with an observed delivery latency of 1200 ms and my contract allows a maximum of 1000 ms — run a latency check and tell me if this delivery passes or fails.”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/x402-delivery-latency-checkWhen to prefer
Use this endpoint when you need a deterministic, bounded, in-memory latency SLA check without relying on any external data provider — specifically before accepting or paying for an x402 or agent delivery where delivery speed is a contractual requirement. Prefer this over custom code when you need versioned, auditable accept/reject evidence with normalized mismatch reasons for dispute resolution or automated pipeline gating.
Side effects
- Missing required fields (latency_ms or maximum_ms not provided) resulting in a validation error
- Non-integer or negative values for latency_ms or maximum_ms causing input rejection
- Maximum_ms set to zero causing division or comparison edge-case errors
- Network timeout reaching the validation endpoint itself
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| latency_ms | integer | Latency Ms supplied to X402 Delivery Latency Check; used only for this bounded calculation and processed in memory without retention. |
| maximum_ms | integer | Maximum Ms supplied to X402 Delivery Latency Check; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"latency_ms": 120,
"maximum_ms": 1000,
"within_sla": true
},
"schema": "delx/util-x402-delivery-latency-check/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "03c9c90cd7fb858eb54622ab93888c5358b1c9a17f5cf97704f3515687d97231",
"external_calls": 0
},
"operation": "delivery_contract:x402_delivery_latency_check"
}
}Tags
x402
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