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Cross-Protocol Payment-Intent Routing Decision Procedure
x402
Cross-Protocol Payment-Intent Routing Decision 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 2026-09-15).
Returns an agent-facing decision procedure for routing a payment intent across x402, AP2, or MPP protocols, covering capability checks, cost/latency comparison, policy enforcement, single-routing rules, and receipt binding.
Price / call$0.002
Success—
StatusUnknown
How this service works
Decision procedure for an agent holding a payment intent that can be settled via multiple protocols: x402, AP2, or MPP. Covers protocol capability checks against the merchant offer, intent normalization across protocols, cost and latency comparison, scoped-account policy envelope checks (approved intent, policy expiry, spending caps) before routing, a single-routing rule so one intent is never double-settled across protocols, re-quote fallback, and receipt binding to the chosen protocol.
Output
A structured prose decision brief (and optionally a procedure field) describing the step-by-step routing logic: protocol capability checks against the merchant offer, intent normalization, cost and latency scoring, policy envelope validation, single-routing enforcement, re-quote fallback steps, and receipt binding instructions. Includes metadata such as generatedAt timestamp, model used, generation source (llm/reasoning/deterministic), and service slug.
Example use cases
Choosing cheapest rail for recurring agent payments
“My agent needs to pay a merchant that accepts x402 and AP2 — give me the step-by-step procedure to compare fees and settlement speed, check my spending cap, and pick the cheapest protocol without risking double-settlement.”
Policy-gated payment routing for enterprise agent
“Before my agent routes a payment intent, I need it to verify the scoped-account policy envelope is still valid, the spending cap hasn't been exceeded, and the approved intent hasn't expired — what's the full procedure for all those checks before committing to a protocol?”
Fallback re-quote after failed routing attempt
“My agent tried to route a payment via x402 but the quote expired mid-flight — what's the correct re-quote fallback procedure to get a fresh quote and re-route to the next best available protocol without double-settling?”
Technical details
Endpoint
GEThttps://k2so-8080.on.ascii.dev/api/services/agent-payment-intent-and-authorization-governancWhen to prefer
Use this endpoint when an agent holds a payment intent that could be settled via more than one protocol (x402, AP2, MPP) and needs authoritative, policy-aware routing logic rather than a simple fee lookup. Prefer it over generic fee-ranking endpoints when you also need policy envelope checks, single-routing enforcement, re-quote fallback logic, and receipt binding guidance bundled into one decision procedure.
Side effects
- Merchant offer does not match any supported protocol — procedure returns no viable routing path
- Policy envelope expired or spending cap exceeded — procedure halts before routing
- Re-quote fallback fails if merchant is offline or unresponsive
- LLM-generated procedure may be stale if underlying protocol rules change
- HTTP 402 returned if payment is not provided; meta=1 query param bypasses payment for free metadata only
- Malformed input (wrong HTTP method or missing required fields) returns an error response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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