---
title: "Sale price after one or more stacked percentage discounts (applied sequentially, not summed) plus an optional flat amount off."
method: POST
path: "/v1/commerce/discount"
tags: ["Commerce"]
---

# Sale price after one or more stacked percentage discounts (applied sequentially, not summed) plus an optional flat amount off.

`POST /v1/commerce/discount`

## Request

- Base URL: `` (relative, and it does not resolve against the document’s source URL)
- URL: `/v1/commerce/discount`
- Auth: none declared

Sale price after one or more stacked percentage discounts (applied sequentially, not summed) plus an optional flat amount off.

Payment: x402 ($0.02 USDC on eip155:8453). Call unpaid to receive an HTTP 402 with requirements, then retry with the PAYMENT-SIGNATURE header. Method: price = original * prod(1 - dᵢ/100) - flatOff; savings = original - final

## Request body

- object
  - `originalPrice` number, required
  - `discountsPct` number[]
  - `discountPct` number
  - `flatOff` number

## Response `200`

Verified result + provenance (formula, sources, reproducible SHA-256 hash).

## Other responses

- `400`: Invalid input (no charge) — body echoes the JSON Schema.
- `402`: Payment required — PAYMENT-REQUIRED header carries the x402 accepts[] quote.

---

[API](https://skmtc.dev/x402toll/apis/tollbooth-verified-calculators-for-ai-agents.md) · [All operations](https://skmtc.dev/x402toll/apis/tollbooth-verified-calculators-for-ai-agents/llms.txt) · [OpenAPI document](https://skmtc.dev/x402toll/apis/tollbooth-verified-calculators-for-ai-agents/revisions/60cb70a3e1a5?raw)