---
title: "APP Fraud Graph Simulator"
method: POST
path: "/v1/tools/simulate_app_fraud_graph"
tags: ["APP-fraud", "PSR", "Monte-Carlo", "fraud-graph", "aml", "PSD2", "payment-fraud", "UK-PSR"]
---

# APP Fraud Graph Simulator

`POST /v1/tools/simulate_app_fraud_graph`

## Request

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

Monte Carlo BFS simulation of APP (Authorised Push Payment) fraud propagation across payment networks. PSR reimbursement cap modelling. Retail, corporate-sweep, and mule-dense topologies. Synthetic networks only — zero PII.

**Tool URL:** https://ainumbers.co/chaingraph/mms-03-app-fraud-graph.html
**AP2/Policy Mandate export:** yes

## Request body

- object
  - `detection_rate` unknown, required
  - `n_paths` unknown, required
  - `psr_threshold` unknown, required
  - `seed` unknown, required
  - `topology` string: type not evidenced by kernel source

## Response `200`

Successful tool execution result

- object: Tool execution result payload

---

[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)