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Multi-Rail x402 Settlement Route Selection Procedure
x402
Multi-Rail x402 Settlement Route Selection 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 2026-09-13).
Returns an AI-generated decision procedure for selecting the optimal payment settlement rail when an agent receives an x402 offer with multiple rail options.
Price / call$0.002
Success—
StatusUnknown
How this service works
Define a complete decision procedure for an agent that, upon receiving an x402 offer, must select the optimal settlement rail from multiple available options. Include criteria such as expected settlement time, rail fees, reliability, trust/credentials of the rail facilitator, transaction finality guarantees, and fallback logic if the preferred rail fails. Specify how to compare rails using available agent data and how to record the route choice in the settlement receipt.
Output
A structured prose decision procedure (the 'brief' or 'procedure' fields) generated by an LLM or reasoning system, covering: criteria for comparing rails (fees, settlement time, reliability, facilitator trust, finality), a scoring/ranking method using available agent data, fallback logic if the preferred rail fails, and guidance on recording the route choice in the settlement receipt. Response includes metadata like generatedAt timestamp, model used, and generation source.
Example use cases
Autonomous agent x402 rail selection
“My agent just received an x402 payment offer with three different settlement rail options and I need it to automatically pick the best one — can you give me a decision procedure that weighs fees, speed, and facilitator trust?”
Fallback logic for failed preferred rail
“What should my agent do if the preferred x402 settlement rail fails mid-transaction? I need a complete fallback procedure so it can automatically retry on the next-best rail without losing the payment.”
Recording route choice in settlement receipt
“After my agent picks a settlement rail for an x402 payment, how should it record the route selection decision in the settlement receipt so there's a clear audit trail of why that rail was chosen?”
Technical details
Endpoint
GEThttps://k2so-8080.on.ascii.dev/api/services/multi-rail-x402-settlement-route-selection-an-agWhen to prefer
Use this endpoint when building an autonomous agent that must programmatically choose among multiple x402 settlement rails and needs a structured, vetted decision procedure rather than implementing ad-hoc logic. Prefer this over general finance or payment routing APIs when the context is specifically x402 protocol payments, multi-rail comparison, and agent-readable procedural guidance.
Side effects
- Payment required but not provided — returns 402 with payment instructions
- Invalid query parameters — returns validation error
- LLM generation failure — ok field is false with error detail
- Rate limiting or upstream AI service unavailability
- Topic override parameter unrecognized or out of scope
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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