# CrushRewards Price Drop Alert

> CrushRewards Price Drop Alert is a paid API for AI agents from api.crushrewards.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-10).

Checks whether a product's current price is below its rolling average over a configurable lookback window, returning current price, rolling average, lowest-seen price, and a boolean drop flag.

## Facts

- Endpoint: GET https://api.crushrewards.dev/v1/shopper/price-drop-alert?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-10
- Success rate: 0% of calls made through Zero
- Activations on Zero: 1
- Tags: x402
- Canonical page: https://www.zero.xyz/c/api-crushrewards-dev-4c1bd468
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_H21d-MNUbs6BV3VpG7X5l

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability api-crushrewards-dev-4c1bd468
```

Example prompt: Check if the current Amazon price for 'Sony WH-1000XM5 headphones' in the US is below its rolling average over the last 60 days — I want to know if it's a real deal right now.

## When to prefer this

Use this endpoint when you need to determine in real time whether a specific product's current price represents a genuine discount relative to its recent price history, especially when you need the is_price_drop boolean flag, percentage deviation from average, and all-time lowest price in one call. Prefer this over generic price history endpoints when the goal is deal-detection rather than raw historical data.

## Known failure modes

- No matching product found for the query — returns empty or 404-like response
- Retailer not supported for the given country — enum mismatch error
- lookback_days out of range (below 1 or above 365) — validation error
- Insufficient price history for the lookback window — may return null average
- Payment not completed (x402) — 402 Payment Required before data is returned

## How this service works

Real-time pricing, promotions, and competitive intelligence across US and Canadian retailers — exposed as paid API endpoints and MCP tools that AI agents can call directly, with x402 and MPP micropayments per query.

## Output

Returns the matched product name, retailer, country, currency, current price, rolling average price over the configured lookback window (field named avg_price_last_30d for backwards compatibility), the percentage difference between current and average price, a boolean is_price_drop flag, and the all-time lowest seen price along with the date it occurred.

## Example request

```json
{
 "q": "Apple iPhone 15",
 "country": "us",
 "retailer": "amazon",
 "time_window": "last_30_days"
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/api-crushrewards-dev-4c1bd468/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.crushrewards.dev](https://www.zero.xyz/host/api.crushrewards.dev/llms.txt)