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x402 New-Rail Rollout Decision Procedure with CDN Stale-Challenge Handling
x402
x402 New-Rail Rollout Decision Procedure with CDN Stale-Challenge Handling 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 2026-10-23).
Returns a PASS or ROLLBACK decision for safely adding a new payment settlement rail to a live x402-metered endpoint, covering CDN stale-challenge mitigation, pre-flight capability checks, staged rollout, and rollback criteria.
Price / call$0.002
Success—
StatusUnknown
How this service works
Decision procedure for a merchant adding a new settlement rail to a live x402-metered endpoint. Covers the CDN stale-challenge problem (edge caches serving old 402 payment terms), pre-flight capability evidence for the new rail, staged rollout with old rail kept active, cross-region 402 challenge verification, and explicit rollback criteria. Output: PASS with rollout window or ROLLBACK with evidence. Built for operators who have been burned debugging stale CDN caches after announcing a new rail
Output
A structured response containing a PASS with rollout window or ROLLBACK with supporting evidence, plus a detailed decision procedure prose brief covering CDN stale-challenge handling, pre-flight capability evidence for the new rail, staged rollout guidance, and explicit rollback criteria. Includes generation timestamp, source model, and service metadata.
Example use cases
CDN stale-challenge go/no-go before launch
“We're adding a new Ethereum settlement rail to our live x402 endpoint tomorrow and I've been burned before by edge caches serving old 402 payment terms — run the rollout decision procedure and tell me if it's safe to proceed or if we need to roll back.”
Staged rollout with legacy rail still active
“I want to keep our existing Base rail running while we stage a rollout of a new Solana settlement rail on our x402 API — give me the step-by-step procedure and a PASS or ROLLBACK verdict with evidence.”
Cross-region 402 challenge verification after rail switch
“After switching our x402 endpoint to a new settlement rail, some regions are still seeing old 402 challenges — can you run the cross-region verification procedure and tell me whether to continue the rollout or trigger rollback?”
Technical details
Endpoint
GEThttps://k2so-8080.on.ascii.dev/api/services/x402-endpoint-new-rail-rollout-procedure-for-mer?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you are a merchant or operator adding a new settlement rail to a live x402-metered API and need a structured go/no-go decision that explicitly addresses CDN stale-challenge propagation delays, cross-region 402 verification, and rollback criteria — especially if you have previously encountered CDN cache problems after announcing a new rail. Prefer over generic rollout guides when you need an x402-specific, agent-callable decision procedure with explicit PASS/ROLLBACK output.
Side effects
- Missing required 'type' or 'method' input fields returns a validation error
- Invalid method values (outside GET/HEAD/DELETE) are rejected by schema
- LLM generation failure may return ok:false with no procedure text
- Network timeout to the k2so-8080.on.ascii.dev host results in no response
- Payment failure (insufficient USDC or stale 402 challenge) blocks paid response; use meta=1 for free metadata only
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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