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Runtime Payment-Failure Behavior for Agents: Knock-or-Backoff Decision Procedure
x402
Runtime Payment-Failure Behavior for Agents: Knock-or-Backoff Decision Procedure is a paid API for AI agents from k2so.wrong.systems, paid per call via x402, $0.002/call, status down (last checked 2026-10-30).
Returns a paid AI-generated decision procedure brief describing how an autonomous agent should behave when a no-queue x402 paid API response fails at runtime — whether to knock again or back off.
Price / call$0.002
Success—
StatusDown
How this service works
Paid agent-facing brief on runtime payment-failure behavior for agents: knock-or-backoff for no-quote and broken-quote x402 endpoints, retry budgets, backoff timing, alternate merchant fallback when challenge is malformed or settlement RPC fails · Build a decision procedure or schema for: runtime payment-failure behavior for agents: knock-or-backoff for no-quote and broken-quote x402 endpoints, retry budgets, backoff timing-0. Blunt decision procedure, not marketing.
Output
A JSON object containing a plain-prose decision procedure brief (120+ words) advising an agent on knock-or-backoff behavior for no-queue paid x402 response failures. Includes the generating model name, topic, service slug, ISO-8601 generation timestamp, generation source (llm/reasoning/deterministic), and payment metadata confirming USDC settlement on Base.
Example use cases
Agent retry logic after payment silence
“My autonomous agent just paid USDC via x402 and got no response — should it knock again or back off? Give me the decision procedure for handling that kind of runtime payment failure.”
Building fault-tolerant x402 agent merchant
“I'm building an agent that calls paid x402 APIs and I need a clear procedure for what it should do when a payment goes through but the response never comes — knock-or-backoff style guidance please.”
Debugging stalled micropayment in agent workflow
“My agent pipeline stalled after an x402 micropayment: payment settled on-chain but the API returned nothing. Walk me through the runtime decision procedure for whether to retry or abandon that call.”
Technical details
Endpoint
GEThttps://k2so.wrong.systems/api/services/runtime-payment-failure-behavior-for-agents-knoc?utm_source=zero.xyzWhen to prefer
Choose this endpoint when an autonomous agent needs authoritative, LLM-generated procedural guidance specifically about x402 runtime payment-failure behavior — particularly the knock-or-backoff decision for no-queue paid responses. Prefer this over generic retry-logic documentation when operating within the x402 micropayment ecosystem on Base, where the cost ($0.002 USDC) is trivial and the output is tailored to agentic decision-making rather than human developers.
Side effects
- HTTP 402 returned if USDC payment not settled before retry — must pay exact amount and include PAYMENT-SIGNATURE header
- Invalid method (POST, PUT, PATCH) rejected — only GET/HEAD/DELETE supported
- Missing required 'input' object in request body causes validation error
- Payment signature mismatch or expired signature causes rejection
- Network unavailability of k2so.wrong.systems returns connection error
- Meta=1 query param returns free metadata JSON without triggering payment flow
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": "runtime-payment-failure-behavior-for-agents-knoc",
"procedure": "same as brief",
"generatedAt": "2026-01-01T00:00:00.000Z",
"generationSource": "deterministic"
},
"service": "runtime-payment-failure-behavior-for-agents-knoc",
"provider": "K-2SO"
}
}Tags
x402
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