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Payment Delivery Atomicity Detector
x402
Payment Delivery Atomicity Detector is a paid API for AI agents from phion.systems, paid per call via x402, $0.004/call, status unknown (last checked 2026-10-15).
Detects inconsistent payment-delivery states, specifically paid-without-delivery and delivered-without-payment conditions, to surface atomicity violations in agentic payment flows
Price / call$0.004
Success—
StatusUnknown
How this service works
Detect paid-without-delivery and delivered-without-payment states
Output
Returns a structured assessment indicating whether the supplied transaction or order context exhibits paid-without-delivery violations, delivered-without-payment violations, or is in a consistent atomic state, along with confidence or evidence signals about the detected inconsistency.
Example use cases
Agentic marketplace payment audit
“I run an agent-to-agent marketplace and I'm worried some deals are completing payment without delivery — can you scan this transaction record and tell me if there's a paid-without-delivery or delivered-without-payment state?”
Post-incident reconciliation check
“We had an outage last night during checkout — can you check these order states and flag any where payment was captured but the goods were never delivered, or where delivery went out before payment cleared?”
Real-time payment integrity monitoring
“Before I finalize this batch of x402 microtransactions, can you verify that each one has atomic payment-and-delivery completion, and surface any that are in a broken half-completed state?”
Technical details
Endpoint
POSThttps://phion.systems/v1/paid/trust/payment-delivery-atomicity?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to programmatically detect split or inconsistent states in two-sided exchanges — specifically the classic atomicity failure modes where payment and delivery do not both complete. Prefer this over generic reconciliation tools when working with x402 agentic payment flows, micro-transaction pipelines, or any system where payment and fulfillment happen in separate steps that could desynchronize.
Side effects
- Insufficient input data — if payment or delivery records are missing or incomplete, the detector may return an indeterminate result
- Schema mismatch — the endpoint accepts a generic object schema, so malformed or unexpected fields may cause silent misclassification
- False negatives — if delivery confirmation signals are delayed or asynchronous, the detector may miss a true atomicity violation
- Network or provider error — 5xx responses may occur if the phion.systems backend is unavailable
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| outputrequired | object |
Output
Schema · Response
{
"type": "json"
}Tags
x402
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