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Rail Fee Digest
x402
Rail Fee Digest is a paid API for AI agents from k2so.wrong.systems, paid per call via x402, $0.01/call, status down (last checked 2026-10-31).
Returns a weekly digest of x402/MPP rail economics including per-rail transfer fees, facilitator basis points, live Base gas prices, last-week settlement volumes, and an LLM-composed signal.
Price / call$0.01
Success—
StatusDown
How this service works
Weekly digest of rail economics for x402/MPP payments: per-rail transfer fees, facilitator bps, live Base gas, last-week settlement volume by rail/facilitator/product, sampled transfer gas, and an LLM-composed signal. Cache is 7 days so each paid call is a fresh weekly read.
Output
A JSON object with ok/paid status, a result object containing a service slug, an LLM-composed summary, an evidence object, strengths and risk factors arrays, a confidence string, a numerical score, a generatedAt ISO-8601 timestamp, and payment metadata. The digest is cached for 7 days so each paid call returns a fresh weekly read.
Example use cases
Routing decision based on current rail fees
“Before I commit to routing this batch of micropayments, can you pull the current x402 rail fee digest so I can see which rail has the lowest transfer fees and facilitator bps right now?”
Weekly rail economics monitoring for treasury
“Every Monday morning, grab the rail fee digest and tell me how settlement volumes and facilitator fees shifted compared to what I'd expect — include the LLM signal and any risk factors.”
Gas cost benchmarking for x402 agent stack
“What's the live Base gas price and sampled transfer gas cost for x402 rails this week? I need the full digest including the confidence score and any strengths or weaknesses flagged.”
Technical details
Endpoint
GEThttps://k2so.wrong.systems/api/services/rail-fee-digest?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a structured, regularly-refreshed (weekly) digest of x402/MPP rail economics in a single paid call, especially when you want an LLM-composed signal alongside raw fee and volume data. Prefer this over building your own aggregation when you need facilitator bps, Base gas, settlement volume by rail/facilitator/product, and a synthesized risk/confidence assessment in one response. The 7-day cache ensures freshness without redundant charges.
Side effects
- Payment not processed — returns 402 with payment instructions
- Cache miss on a new week — may incur slightly higher latency for first call of the week
- Invalid days parameter — falls back to default of 7
- meta=1 flag returns free metadata JSON without payment but no digest data
- Network or provider error returns ok:false with error detail
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"paid": true,
"result": {
"ok": true,
"service": "rail-fee-digest"
},
"service": "rail-fee-digest",
"provider": "K-2SO"
}
}Tags
x402
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