---
title: "On-Chain Cash-Leg Finality Checker"
method: POST
path: "/v1/tools/check_cash_leg_finality"
tags: ["canton", "cash-leg", "finality", "stablecoin", "genius", "mica", "pfmi"]
---

# On-Chain Cash-Leg Finality Checker

`POST /v1/tools/check_cash_leg_finality`

## Request

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

Validate the cash leg of a Canton settlement: finality model (PFMI P8/P12), reserve attestation, GENIUS Act / MiCA regulatory classification, and depeg circuit-breaker. Returns verdict PASS / CONDITIONAL / FAIL with assurance memo.

**Tool URL:** https://ainumbers.co/tools/506-onchain-cash-leg-finality-checker.html
**AP2/Policy Mandate export:** yes

## Request body

- object
  - `cash_leg_type` 'usdc' | 'jpmd' | 'hsbc_deposit' | 'eur_emt' | 'custom', required: Type of on-chain cash instrument.
  - `amount` number, required: Settlement amount in stated currency.
  - `currency` 'USD' | 'EUR' | 'GBP' | 'HKD' | 'SGD', required
  - `finality_model` 'atomic_dvp_bound' | 'conditional_irrevocable' | 'standard_blockchain' | 'traditional_wire', required: Cash-leg finality mechanism. Assessed against CPMI-IOSCO PFMI Principles 8 and 12.
  - `jurisdiction` 'us' | 'eu' | 'hk' | 'sg' | 'other', required: Regulatory jurisdiction. us → GENIUS Act check; eu → MiCA Title III check.
  - `reserve_attestation_available` boolean
  - `cash_pct` number: Cash / FDIC-insured deposit % of reserves.
  - `tbills_pct` number: T-bills ≤93 days % of reserves.
  - `repo_pct` number: Fed overnight repo % of reserves.
  - `depeg_defined` boolean
  - `depeg_threshold` number: Depeg circuit-breaker trigger % (default 0.5). >1.0 → DEPEG_THRESHOLD_WIDE.
  - `redemption_window` 'instant' | 'same_day' | 't1' | 't2_plus'

## Response `200`

Successful tool execution result

- object
  - `verdict` 'CASH_LEG_VERDICT_PASS' | 'CASH_LEG_VERDICT_CONDITIONAL' | 'CASH_LEG_VERDICT_FAIL'
  - `finality_flag` string
  - `genius_status` string
  - `mica_status` string
  - `compliance_flags` object
  - `mandate_type` 'attestation_mandate'

---

[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)