---
title: "Tool 65 — Cross-Rail Settlement Finality Auditor"
method: POST
path: "/v1/tools/settlement_finality_auditor"
---

# Tool 65 — Cross-Rail Settlement Finality Auditor

`POST /v1/tools/settlement_finality_auditor`

## Request

- Base URL: `https://ainumbers.co`
- URL: `https://ainumbers.co/v1/tools/settlement_finality_auditor`
- Auth: none declared

Compare operational vs legal finality timelines across RTGS, real-time, and tokenized payment rails. Counterparty exposure window calculator. Covers Fedwire, TARGET2, FedNow, RTP, Fnality, mBridge, and more.

**Tool URL:** https://ainumbers.co/tools/65-settlement-finality-auditor.html
**AP2/Policy Mandate export:** yes

## Request body

- object
  - `txnAmount` string
  - `defaultProb` string

## Response `200`

Successful tool execution result

- object

---

[API](https://skmtc.dev/ainumbers/apis/ainumbers-co-fintech-intelligence-suite.md) · [All operations](https://skmtc.dev/ainumbers/apis/ainumbers-co-fintech-intelligence-suite/llms.txt) · [OpenAPI document](https://skmtc.dev/ainumbers/apis/ainumbers-co-fintech-intelligence-suite/revisions/b462e4f5bb28?raw)