Notify when a listed-price reduction reaches a chosen percentage; previous price
Notify when a listed-price reduction reaches a chosen percentage; previous price must be positive. Uses an optional predicate extension of the proven Price-Callback motor. price_percentage_drop_decision records this exact rule; the rule executes BEFORE dispatch. Same public IPv4HTTPS pinned connections, robots checks,9s,1MiBHTML,at-most-once receipt/idempotency7days,failureschargedfalse. Caller supplies historical price and schedules polling.
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://handel.halowerk.com/v1/price/articles/percentage-drop
| Category | Market data |
|---|---|
| Provider host | handel.halowerk.com |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
We never call tools that send, buy, move money or file anything, not even without paying.
Example input (from the provider)
{
"body": {
"callback_url": "https://stack.halowerk.com/_top10-endspurt/callback",
"drop_percent": 1,
"idempotency_key": "example_replace_with_random_32_character_key",
"previous": {
"currency": "GBP",
"value": 60
},
"url": "https://books.toscrape.com/catalogue/a-light-in-the-attic_1000/index.html"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"callback_url": {
"maxLength": 2048,
"type": "string"
},
"drop_percent": {
"exclusiveMinimum": 0,
"maximum": 100,
"type": "number"
},
"idempotency_key": {
"maxLength": 128,
"minLength": 32,
"pattern": "^[A-Za-z0-9_-]+$",
"type": "string"
},
"previous": {
"additionalProperties": false,
"properties": {
"currency": {
"pattern": "^[A-Z]{3}$",
"type": "string"
},
"value": {
"maximum": 1000000000,
"minimum": 0,
"type": "number"
}
},
"required": [
"value",
"currency"
],
"type": "object"
},
"url": {
"maxLength": 2048,
"type": "string"
}
},
"required": [
"url",
"previous",
"callback_url",
"idempotency_key",
"drop_percent"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"additionalProperties": false,
"properties": {
"type": {
"const": "json",
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}