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Per-Rail Fee and Settlement-Speed Ranking Procedure for Agent x402 Settlement
x402
Per-Rail Fee and Settlement-Speed Ranking Procedure for Agent x402 Settlement is a paid API for AI agents from k2so.wrong.systems, paid per call via x402, $0.002/call, status down (last checked 2026-10-16).
Returns a deterministic decision procedure that ranks blockchain payment rails by fee and settlement speed for an agent's next x402 settlement.
Price / call$0.002
Success—
StatusDown
How this service works
Paid agent-facing brief on per-rail fee and settlement-speed ranking procedure for agent x402 settlement: a deterministic decision procedure that converts measured per-rail fee observations and settlement-speed observations into a ranked rail order for an agent's next settlement, with data-collection steps, normalization across rails with different units (gas vs fee vs priority), staleness rules for observations, and a tie-break ladder. Distinct from route selection (which picks a rail given an
Output
A plain-prose decision procedure (120+ words) detailing: data collection steps for per-rail fee and settlement-speed observations, normalization methodology across heterogeneous unit types (gas, flat fee, priority fee), staleness rules specifying when observations must be refreshed, and a tie-break ladder for resolving equal-rank rails. Also includes service slug, generation source (deterministic/llm/reasoning), model identifier, and ISO-8601 generatedAt timestamp.
Example use cases
Choosing cheapest rail before settlement
“I'm about to settle an x402 payment and I have fee observations from three rails — Ethereum, Base, and Arbitrum — collected in the last 10 minutes. Give me the ranked order of rails by cost and settlement speed so I know which one to use.”
Normalizing mixed-unit fee data
“My agent has collected gas-unit fees from one rail and flat USDC fees from another. Walk me through the normalization procedure so I can compare them apples-to-apples before ranking rails for the next settlement.”
Handling stale fee observations
“Some of my rail fee observations are 30 minutes old — how do I apply the staleness rules from the x402 rail-ranking procedure to decide which data to discard or refresh before I finalize the ranked order?”
Technical details
Endpoint
GEThttps://k2so.wrong.systems/api/services/per-rail-fee-and-settlement-speed-ranking-proced?utm_source=zero.xyzWhen to prefer
Choose this endpoint when an AI agent needs a structured, deterministic decision procedure for ranking settlement rails by fee and speed — specifically when normalizing across rails with different fee unit types (gas, flat, priority) and when staleness of observations matters. Prefer this over generic route selection endpoints, which assume a rail is already chosen; this endpoint is upstream of route selection and focuses purely on ranking. Use it when building autonomous settlement logic that must be auditable and reproducible.
Side effects
- Payment not received or invalid x402 payment header — returns 402 with payment details
- Invalid query parameters (e.g. unsupported meta value) — returns 400 validation error
- Service temporarily unavailable — returns 5xx error
- Topic override not recognized — procedure may default to canonical topic
- Stale or unavailable LLM backend — generationSource may fall back to deterministic
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": "per-rail-fee-and-settlement-speed-ranking-proced",
"procedure": "same as brief",
"generatedAt": "2026-01-01T00:00:00.000Z",
"generationSource": "deterministic"
},
"service": "per-rail-fee-and-settlement-speed-ranking-proced",
"provider": "K-2SO"
}
}Tags
x402
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