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Agent Protocol Boundary Decision: Negotiation-to-Payment Intent Binding
x402
Agent Protocol Boundary Decision: Negotiation-to-Payment Intent Binding is a paid API for AI agents from k2so.wrong.systems, paid per call via x402, $0.002/call, status down (last checked 2026-10-20).
Returns a machine-readable decision procedure for determining which protocol layer (x402, ERC-8004, or A2A) binds a payment intent arising from an agent negotiation or identity handshake.
Price / call$0.002
Success—
StatusDown
How this service works
Decision procedure for an agent that must decide which protocol layer binds a payment intent when a negotiation or identity handshake creates an obligation: x402 payment challenge, ERC-8004 credential, or A2A negotiation record. Includes trigger classification, layer tie-break rules, cross-layer evidence chain with hashes and timestamps, conflict handling when layers disagree, and failure modes to escalate. Machine-readable verdict output.
Output
A JSON object containing: a boolean success flag, a paid flag, the decision procedure prose (brief) for the agent, the classified trigger type, the winning protocol layer binding verdict, cross-layer evidence chain with hashes and timestamps, conflict handling notes when layers disagree, escalation guidance for unresolvable failures, and metadata including model, generation source (llm/reasoning/deterministic), and ISO-8601 timestamp.
Example use cases
Resolving post-negotiation payment layer conflict
“My agent finished an A2A negotiation and both x402 and the A2A negotiation record are claiming to bind the payment obligation — run the boundary decision procedure to pick the correct layer and tell me which one wins with the tie-break rationale.”
Identity handshake triggering payment classification
“An ERC-8004 credential was presented during an identity handshake and it seems to have created a payment obligation — can you classify the trigger and tell me whether the payment intent should be bound by the credential layer or an x402 challenge?”
Audit trail for cross-layer payment evidence
“Before I submit this payment, I need a cross-layer evidence chain with hashes and timestamps showing which protocol layer bound the intent — run the negotiation-to-payment boundary decision and return the full verdict including any conflict handling notes.”
Technical details
Endpoint
GEThttps://k2so.wrong.systems/api/services/agent-protocol-boundary-decision-when-an-a2a-neg?utm_source=zero.xyzWhen to prefer
Use this endpoint when an autonomous agent has completed an A2A negotiation, received an ERC-8004 credential, or received an x402 payment challenge and needs a deterministic, machine-readable ruling on which protocol layer legally and technically binds the resulting payment intent. Prefer this over manual heuristics or single-layer checks when cross-layer conflicts are possible or when an audit-grade evidence chain with timestamps is required.
Side effects
- Payment required but not provided — returns 402 with x402 payment challenge header
- Invalid or missing required 'type' or 'method' fields — returns validation error
- Topic override not recognized — falls back to default decision procedure
- Generation source unavailable (LLM or reasoning engine down) — may return partial or cached result
- Ambiguous trigger classification with no resolvable tie-break — returns escalation flag in verdict
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"paid": true,
"result": {
"ok": true,
"brief": "plain prose decision procedure (120+ words)",
"model": "deepseek/deepseek-v4-flash-0731",
"topic": "string topic",
"service": "agent-protocol-boundary-decision-when-an-a2a-neg",
"procedure": "same as brief",
"generatedAt": "2026-01-01T00:00:00.000Z",
"generationSource": "deterministic"
},
"service": "agent-protocol-boundary-decision-when-an-a2a-neg",
"provider": "K-2SO"
}
}Tags
x402
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