---
title: "Calculate payment preview with fee breakdown"
method: POST
path: "/api/v1/ExternalPayment/calculate-payment-preview"
tags: ["ExternalPayment"]
---

# Calculate payment preview with fee breakdown

`POST /api/v1/ExternalPayment/calculate-payment-preview`

## Request

- Base URL: `https://api.fireserviceusa.com` (the document declares no server; this is the origin it was published from)
- URL: `https://api.fireserviceusa.com/api/v1/ExternalPayment/calculate-payment-preview`
- Auth: none declared

## Request body

- PaymentPreviewRequest: Request model for previewing a payment
  - `PaymentRequestGuid` string, nullable
  - `PaymentMethod` string, nullable
  - `Amount` number, double, nullable: Optional client-provided unpaid total (used if lower than server computed unpaid amount).

## Response `200`

Success

---

[API](https://skmtc.dev/fireserviceusa/apis/fireservice-usa-p2-api.md) - [All operations](https://skmtc.dev/fireserviceusa/apis/fireservice-usa-p2-api/llms.txt) - [OpenAPI document](https://skmtc.dev/fireserviceusa/apis/fireservice-usa-p2-api/revisions/96ea2ea68d87?raw)