Api Endpoint

Forecast (Holt-Winters seasonal)

Holt-Winters triple exponential smoothing - level + trend + seasonal component. Use for series with a repeating cycle (weekly retail traffic, monthly utility usage, quarterly revenue). Additive seasonality (constant amplitude) or multiplicative (amplitude grows with level). `period` is optional - if omitted, the kit auto-detects via autocorrelation on first differences and surfaces what it picked (with the ACF strength) so you can audit. Needs at least two full seasonal cycles to fit reliably.

Open interactive test console

Offering

Provider: agent402.tools
Method: POST
Offering type: Api Endpoint
Transport type: http
Category: Data
Delivery: Not provided
Pricing model: Not provided
x402 version: 2

Endpoint context

URL: https://agent402.tools/api/forecast-holt-winters
MIME type: application/json
First seen: 2026-10-16T01:51:20.002Z
Last seen: 2026-11-02T13:52:45.886Z
Tags: Data, forecast, timeseries, holt-winters, seasonal

Website

Payment pricing

x402 payment terms are the authoritative price for calling this endpoint.

Payment option 1: 0.001 USDC
Atomic price: 1000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
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Atomic price: 1000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Payment option 16: 1000 atomic units
Atomic price: 1000 · Network: eip155:5042 · Asset: 0x3600000000000000000000000000000000000000 · Scheme: exact

Raw x402 terms

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Observed health

Status: Healthy
Latest latency: 95 ms
Average latency: 243 ms
HTTP status: 204
Last checked: 2026-11-04T09:45:40.295Z
Reachability: 100% over 10 checks

Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.

Input schema

{
  "type": "object",
  "properties": {
    "type": {
      "type": "string",
      "const": "http"
    },
    "method": {
      "type": "string",
      "enum": [
        "POST"
      ]
    },
    "bodyType": {
      "type": "string",
      "enum": [
        "json",
        "form-data",
        "text"
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    },
    "body": {
      "type": "object",
      "properties": {
        "values": {
          "type": "array"
        },
        "horizon": {
          "type": "number"
        },
        "period": {
          "type": "number"
        },
        "seasonality": {
          "type": "string"
        },
        "alpha": {
          "type": "number"
        },
        "beta": {
          "type": "number"
        },
        "gamma": {
          "type": "number"
        }
      },
      "required": [
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        "horizon"
      ]
    }
  },
  "required": [
    "type",
    "method",
    "bodyType",
    "body"
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  "additionalProperties": false
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Output schema

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {
    "input": {
      "additionalProperties": false,
      "properties": {
        "body": {
          "properties": {
            "alpha": {
              "description": "Level smoothing, 0 < alpha < 1 (default 0.5)",
              "type": "number"
            },
            "beta": {
              "description": "Trend smoothing, 0 < beta < 1 (default 0.1)",
              "type": "number"
            },
            "gamma": {
              "description": "Seasonal smoothing, 0 < gamma < 1 (default 0.1)",
              "type": "number"
            },
            "horizon": {
              "description": "Number of future periods to forecast (1 to 1000)",
              "type": "number"
            },
            "period": {
              "description": "Optional seasonal period (e.g. 7 for daily/weekly, 12 for monthly/yearly). Auto-detected via ACF if omitted.",
              "type": "number"
            },
            "seasonality": {
              "description": "\"additive\" (default) or \"multiplicative\"",
              "type": "string"
            },
            "values": {
              "description": "Numeric series in chronological order (max 10000)",
              "type": "array"
            }
          },
          "required": [
            "values",
            "horizon"
          ]
        },
        "bodyType": {
          "enum": [
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            "form-data",
            "text"
          ],
          "type": "string"
        },
        "method": {
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        "type": {
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        "method",
        "bodyType",
        "body"
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            "beta": {
              "type": "number"
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            "forecast": {
              "items": {
                "type": "object"
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              "type": "array"
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            "gamma": {
              "type": "number"
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            "horizon": {
              "type": "integer"
            },
            "method": {
              "type": "string"
            },
            "n": {
              "type": "integer"
            },
            "period": {
              "type": "integer"
            },
            "periodSource": {
              "type": "string"
            },
            "seasonality": {
              "type": "string"
            }
          },
          "required": [
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            "period",
            "periodSource",
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            "forecast"
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      "type": "object"
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}