# HALOWERK Price History New Low Detector

> HALOWERK Price History New Low Detector is a paid API for AI agents from handel.halowerk.com, paid per call via x402, $0.007/call, status unknown (last checked 2026-10-22).

Analyzes a product's price history array to detect whether a new all-time low price has been reached

## Facts

- Endpoint: POST https://handel.halowerk.com/v1/price/articles/history-new-low?utm_source=zero.xyz
- Price: $0.007/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-22
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/halowerk-price-history-new-low-detector-e3400260
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_6XxMyHwWK8VLGyNrtIPTH

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 halowerk-price-history-new-low-detector-e3400260 -d '<json body>'
```

Example prompt: Check if the latest price of €34.99 EUR for this product (https://example.com/product/123) is a new all-time low — here's the price history for the last 3 months: [{url, observed_at, value, currency}, ...], and the previous known low was €36.50 EUR.

## When to prefer this

Choose this endpoint when you need to programmatically determine whether a newly observed price for a specific article represents a historical minimum, especially in automated price-monitoring pipelines or deal-detection workflows. It is particularly suited when you already have a structured price history array (up to 60 entries) and a previously known low, and want a definitive computational answer rather than doing the min-detection logic yourself. Prefer it over manual comparison when operating in a multi-agent commerce automation context that already uses x402 micropayment infrastructure.

## Known failure modes

- Fewer than 3 history items provided — schema requires minItems:3
- History items missing required fields (url, observed_at, value, currency) — validation error
- Currency code not matching ISO 3-letter format — pattern mismatch
- Price value exceeding maximum of 1,000,000,000 — schema rejection
- Duplicate or non-idempotent requests without a valid idempotency_key — potential double-billing
- Payment not received or insufficient USDC balance — x402 payment required response
- Callback URL malformed or unreachable — callback delivery failure

## How this service works

HALOWERK handelswerk — bezahlte Endpunkte nach x402. Preise in USDC auf Base Mainnet.

## Output

A JSON response indicating whether the latest price observation in the provided history constitutes a new all-time low, likely including the identified minimum value, currency, and relevant metadata about when the low was observed.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "url": {
   "type": "string",
   "maxLength": 2048
  },
  "history": {
   "type": "array",
   "items": {
    "type": "object",
    "required": [
     "url",
     "observed_at",
     "value",
     "currency"
    ],
    "properties": {
     "url": {
      "type": "string",
      "maxLength": 2048
     },
     "value": {
      "type": "number",
      "maximum": 1000000000,
      "minimum": 0
     },
     "currency": {
      "type": "string",
      "pattern": "^[A-Z]{3}$"
     },
     "observed_at": {
      "type": "string",
      "maxLength": 40
     }
    },
    "additionalProperties": false
   },
   "maxItems": 60,
   "minItems": 3
  },
  "previous": {
   "type": "object",
   "required": [
    "value",
    "currency"
   ],
   "properties": {
    "value": {
     "type": "number",
     "maximum": 1000000000,
     "minimum": 0
    },
    "currency": {
     "type": "string",
     "pattern": "^[A-Z]{3}$"
    }
   },
   "additionalProperties": false
  },
  "callback_url": {
   "type": "string",
   "maxLength": 2048
  },
  "idempotency_key": {
   "type": "string",
   "pattern": "^[A-Za-z0-9_-]+$",
   "maxLength": 128,
   "minLength": 32
  }
 }
}
```

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/halowerk-price-history-new-low-detector-e3400260/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from handel.halowerk.com](https://www.zero.xyz/host/handel.halowerk.com/llms.txt)