# Per-Rail Settlement Confirmation Wait-Time Thresholds for x402/MPP Agents > Per-Rail Settlement Confirmation Wait-Time Thresholds for x402/MPP Agents is a paid API for AI agents from k2so.wrong.systems, paid per call via x402, $0.002/call, status down (last checked 2026-10-18). Provides a decision table telling x402/MPP agents whether to wait, extend, or declare a settlement dead based on the payment rail, observed confirmation latency, and receipt hash. ## Facts - Endpoint: GET https://k2so.wrong.systems/api/services/per-rail-settlement-confirmation-wait-time-thres?utm_source=zero.xyz - Price: $0.002/call - Payment: x402 - Status: down - Last checked: 2026-10-18 - Activations on Zero: 0 - Tags: x402 - Canonical page: https://www.zero.xyz/c/per-rail-settlement-confirmation-wait-time-thresholds-for-x402-mpp-0e3b82d4 - Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_JJO1ySmUofB7hJW-Fh6F3 Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently. ## How to call it through Zero Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`): ```sh zero fetch --capability per-rail-settlement-confirmation-wait-time-thresholds-for-x402-mpp-0e3b82d4 ``` Example prompt: I paid an x402 challenge on Solana 45 seconds ago and still have no confirmation — tell me whether I should keep waiting, extend the timeout, or declare the payment dead, and flag any double-pay risk if I retry now. ## When to prefer this Choose this endpoint when an x402 or MPP agent has already submitted a payment and needs a structured, per-rail decision on whether to wait longer, extend its timeout, or declare the settlement dead — especially when double-pay risk on retry is a concern. Prefer it over generic blockchain explorers or static documentation when you need a machine-readable verdict with tiered wait guidance across Base, XRPL, Solana, Stellar, and TRON in a single call. ## Known failure modes - Missing or invalid rail parameter may result in a generic rather than rail-specific verdict - Slow or unavailable upstream LLM could delay response or return a degraded generation - If receipt hash is null the double-pay risk assessment may be less precise - Payment not received or facilitator credit exhausted returns unpaid/error state - Network timeout reaching k2so.wrong.systems returns no verdict ## How this service works Decision table for agents that paid an x402/MPP challenge and now must decide when their settlement is actually dead versus merely slow. Per-rail confirmation baselines: Base settles in seconds, XRPL in a few, Solana wants confirmations, Stellar and TRON vary with load. Inputs: rail, observed confirmation latency, receipt hash or null. Outputs: wait verdict per tier (wait, extend, declare-dead), recommended receipt timeout per rail, double-pay risk flag when the agent retries before finality. ## Output Returns a JSON object containing a plain-prose decision procedure (120+ words) advising wait, extend, or declare-dead per tier for the queried rail, a recommended receipt timeout value, a double-pay risk flag for premature retries, an ISO-8601 generatedAt timestamp, and metadata including model, topic, service slug, and generation source (llm, reasoning, or deterministic). ## Request schema (JSON Schema) ```json { "type": "object", "$schema": "https://json-schema.org/draft/2020-12/schema", "required": [ "input" ], "properties": { "input": { "type": "object", "required": [ "type", "method" ], "properties": { "type": { "type": "string", "const": "http" }, "method": { "enum": [ "GET", "HEAD", "DELETE" ], "type": "string" }, "queryParams": { "type": "object", "properties": { "meta": { "enum": [ "0", "1" ], "type": "string", "description": "Set to 1 for free metadata JSON (no payment required)" }, "topic": { "type": "string", "description": "Optional topic override for the decision procedure" } } } }, "additionalProperties": false }, "output": { "type": "object", "required": [ "type" ], "properties": { "type": { "type": "string" }, "example": { "type": "object", "title": "Per-rail settlement confirmation wait-time thresholds for x402/MPP agents paid response", "$schema": "https://json-schema.org/draft/2020-12/schema", "required": [ "ok", "paid", "service", "provider", "result" ], "properties": { "ok": { "type": "boolean" }, "paid": { "type": "boolean" }, "result": { "type": "object", "required": [ "ok", "service" ], "properties": { "ok": { "type": "boolean", "description": "Handler success" }, "brief": { "type": "string", "description": "Decision procedure prose for agents" }, "model": { "type": "string" }, "topic": { "type": "string" }, "service": { "type": "string", "description": "Service slug" }, "procedure": { "type": "string" }, "generatedAt": { "type": "string", "description": "ISO-8601 timestamp" }, "generationSource": { "enum": [ "llm", "reasoning", "deterministic" ], "type": "string" } } }, "payment": { "type": "object", "properties": { "code": { "type": "string" }, "payer": { "type": "string" }, "detail": { … (truncated) ``` ## Response schema (JSON Schema) ```json { "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-settlement-confirmation-wait-time-thres", "procedure": "same as brief", "generatedAt": "2026-01-01T00:00:00.000Z", "generationSource": "deterministic" }, "service": "per-rail-settlement-confirmation-wait-time-thres", "provider": "K-2SO" } } ``` ## More - Live health (JSON, refreshed every minute): https://www.zero.xyz/c/per-rail-settlement-confirmation-wait-time-thresholds-for-x402-mpp-0e3b82d4/health.json - [Zero catalog index](https://www.zero.xyz/llms.txt) - [Other services from k2so.wrong.systems](https://www.zero.xyz/host/k2so.wrong.systems/llms.txt)