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Multi-Rail x402 Payment Feasibility Routing Procedure
x402
Multi-Rail x402 Payment Feasibility Routing Procedure is a paid API for AI agents from k2so.wrong.systems, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).
Evaluates and ranks candidate payment rails (Base x402, XRPL, Algorand, banking) for a given USDC payment amount and payer policy, returning per-rail feasibility verdicts, costs, and a ranked recommendation.
Price / call$0.002
Success—
StatusUnknown
How this service works
Machine-readable decision procedure for multi-rail x402 payment routing. Inputs: payment amount in USDC, payer spending policy (per-call cap, daily budget, allow-listed payees), candidate rails with their fee schedules and settlement latencies (Base x402, XRPL facilitator, Algorand, regulated banking rails). Outputs: per-rail feasibility verdict (settles, blocked-by-cap, not-allow-listed, rail-unavailable), total cost per rail including fee, settlement speed class, a ranked recommendation, and
Output
Returns a structured decision object with: per-rail feasibility verdicts (settles, blocked-by-cap, not-allow-listed, rail-unavailable), total cost per rail including fees, settlement speed class for each rail, a ranked recommendation, and a human-readable decision procedure prose brief for agents.
Example use cases
Micropayment rail selection for API billing
“I'm about to make a 0.002 USDC per-call payment to an API — given my per-call cap of 0.01 USDC, a daily budget of 1 USDC, and rails Base x402, XRPL, and Algorand available, which rail is feasible and cheapest?”
Policy compliance check before agent spend
“Before my agent sends a 0.50 USDC payment to payee 0xABC123, can you run a feasibility check across all available payment rails and tell me if any are blocked by my allowlist or daily budget of 2 USDC?”
Settlement speed comparison for time-sensitive payment
“I need to pay 1.00 USDC and it's time-sensitive — rank all available rails by settlement speed and tell me which ones are feasible given a per-call cap of 2 USDC and no daily budget restriction.”
Technical details
Endpoint
GEThttps://k2so.wrong.systems/api/services/multi-rail-x402-payment-feasibility-routing-giveWhen to prefer
Use this endpoint when an autonomous agent or operator needs to programmatically select the optimal payment rail for a USDC transaction while enforcing spending policy constraints (caps, budgets, allowlists). Prefer it over manual rail selection when multiple rails (Base x402, XRPL, Algorand, banking) are available and fee/latency tradeoffs matter, or when policy compliance must be verified before committing a payment.
Side effects
- Payment amount exceeds per-call cap — rail returns blocked-by-cap verdict
- Payee not on allowlist — rail returns not-allow-listed verdict
- Rail unavailable or unreachable — rail returns rail-unavailable verdict
- Daily budget exhausted — all rails may return blocked-by-cap
- Missing or malformed input parameters — returns error or incomplete feasibility matrix
- Payment insufficient to cover service fee ($0.002 USDC) — 402 response before result is returned
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": "multi-rail-x402-payment-feasibility-routing-give",
"procedure": "same as brief",
"generatedAt": "2026-01-01T00:00:00.000Z",
"generationSource": "deterministic"
},
"service": "multi-rail-x402-payment-feasibility-routing-give",
"provider": "K-2SO"
}
}Tags
x402
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