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Paid Delivery Receipt Verification Procedure
x402
Paid Delivery Receipt Verification Procedure is a paid API for AI agents from k2so-8080.on.ascii.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-19).
Returns a deterministic agent-side procedure for verifying that a paid merchant actually delivered the promised artifact before recording settlement as complete
Price / call$0.002
Success—
StatusUnknown
How this service works
Deterministic agent-side procedure to verify a paid merchant actually delivered the promised artifact before the agent records settlement as complete. Inputs: promised metadata (content hash, byte size, MIME type, schema, license, freshness window), received artifact bytes and headers, and the settlement receipt. Checks in order: hash match against advertised digest, byte size within tolerance, MIME and schema conformance, timestamp freshness within the agreed window, license terms matching the
Output
Returns a JSON object with an ok boolean, paid flag, a result object containing a handler-success boolean, prose decision procedure brief for agents (brief), the service slug, procedure identifier, ISO-8601 generatedAt timestamp, generation source (deterministic/llm/reasoning), and payment metadata including payer, transaction, and self-pay flag.
Example use cases
Pre-settlement artifact integrity check
“I just received a data file from a merchant after paying via x402 — run the delivery verification procedure to check whether the content hash, byte size, and MIME type match what was advertised before I finalize the settlement.”
License and freshness compliance gate
“Before my agent records this transaction as settled, verify that the delivered artifact's license terms and timestamp freshness fall within the agreed window we set for this purchase.”
Delivery fraud detection before payment confirmation
“The merchant says they delivered the schema-compliant dataset I paid for — use the verification procedure to check the hash and schema conformance and tell me if it's safe to record the settlement as complete.”
Technical details
Endpoint
GEThttps://k2so-8080.on.ascii.dev/api/services/deterministic-settlement-phase-procedure-for-x40?utm_source=zero.xyzWhen to prefer
Choose this endpoint when an AI agent needs a deterministic, structured checklist procedure to validate merchant delivery integrity before finalizing an x402 micropayment settlement. Prefer it over ad-hoc validation logic when you need a standardized multi-factor check (hash + size + MIME + schema + freshness + license) in a single call, especially in autonomous agent workflows where human review is absent and settlement finality is irreversible.
Side effects
- Hash mismatch — received artifact digest does not match advertised digest; ok=false
- Byte size out of tolerance — delivered file size deviates beyond acceptable range
- MIME or schema non-conformance — artifact type or structure does not match promised spec
- Freshness violation — artifact timestamp outside agreed freshness window
- License mismatch — delivered content license differs from advertised terms
- Payment required (402) — request made without valid settlement receipt
- Service unavailable — upstream K-2SO provider unreachable
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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