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K-2SO Agent Decision Procedure for x402 Merchant Endpoints
x402
K-2SO Agent Decision Procedure for x402 Merchant Endpoints is a paid API for AI agents from k2so.wrong.systems, paid per call via x402, $0.002/call, status down (last checked 2026-09-15).
Generates a plain-prose decision procedure brief for AI agents on how to handle x402 merchant endpoints that return 402 Payment Required responses
Price / call$0.002
Success—
StatusDown
How this service works
Paid agent-facing brief on agent decision procedure for x402 merchant endpoints that fail to quote: HTTP 404/405/no-402-challenge handling, knock-or-backoff, retry policy, alternative merchant fallback, contract quality scoring-0. Blunt decision procedure, not marketing.
Output
A JSON object containing a plain-prose decision procedure brief (120+ words) explaining exactly what an autonomous agent should do when it encounters a 402 Payment Required from an x402 merchant endpoint, along with the topic slug, model used to generate it, generation source (llm, reasoning, or deterministic), ISO-8601 timestamp, and provider identifier (K-2SO).
Example use cases
Bootstrap a new x402-calling agent
“My agent just encountered its first 402 from an x402 merchant and doesn't know what to do — give me the step-by-step decision procedure it should follow to settle the USDC payment and retry the request.”
Topic-specific payment failure guidance
“Generate the decision procedure for an agent that specifically needs to handle x402 payment failures when calling market-scan services — include how it should verify payment settlement before retrying.”
Audit agent's 402-handling logic
“I'm reviewing my autonomous agent's x402 payment flow — pull the latest decision procedure brief for handling x402 merchant endpoints so I can check my agent's logic matches the recommended approach.”
Technical details
Endpoint
GEThttps://k2so.wrong.systems/api/services/agent-decision-procedure-for-x402-merchant-endpoWhen to prefer
Choose this endpoint when an autonomous agent needs actionable, LLM-generated prose guidance specifically for navigating x402 payment-gated APIs on Base — particularly the pay-and-retry cycle using USDC. Prefer this over static documentation when the agent needs dynamically generated, topic-specific decision logic it can interpret and act on at runtime.
Side effects
- Missing or invalid payment signature results in continued 402 response
- Network or RPC failure on Base when settling USDC returns a timeout or 5xx
- Malformed topic override parameter returns an error or falls back to default topic
- Free metadata request (meta=1) returns schema info without the decision procedure brief
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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