Data Analysis

Seasonal Index Calculator

Calculate seasonal indices for time series data to identify seasonal patterns

json· JSON resultOpen tool

Quick start

Call this tool from your code in three languages.

cURL

curl -X POST 'https://api.elysiatools.com/en/api/tools/seasonal-index-calculator' \
  -H 'Content-Type: application/json' \
  -d '{"data":"Enter time series data (comma or space separated values)...","periods":12,"method":"ratio-to-moving-average","dataFormat":"comma","smoothing":0,"forecastPeriods":0,"deseasonalize":true}'

API reference

Send a POST request with your inputs as JSON. File parameters require a separate upload first.

Endpoint

HTTP

POST https://api.elysiatools.com/en/api/tools/seasonal-index-calculator

Parameters

Name	Type	Required	Description
data	textarea	Yes	—
periods	number	No	—
method	select	No	—
dataFormat	select	No	—
smoothing	number	No	—
forecastPeriods

MCP integration

Add this tool to your Model Context Protocol server so AI agents can list and call it.

Server configuration

Add this block to your MCP client configuration:

mcp.json

{
  "mcpServers": {
    "elysiatools-seasonal-index-calculator": {
      "name": "seasonal-index-calculator",
      "description": "Calculate seasonal indices for time series data to identify seasonal patterns",
      "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=seasonal-index-calculator",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

List available tools

After connecting to the SSE endpoint, list the exposed tools:

tools/list

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/list"
}

Call this tool

Invoke the tool by its id, passing arguments built from its parameters:

tools/call

{
  "jsonrpc": "2.0",
  "id": 2,
  "method": "tools/call",
  "params": {
    "name": "seasonal-index-calculator",
    "arguments": {
  "data": "Enter time series data (comma or space separated values)...",
  "periods": 12,
  "method": "ratio-to-moving-average",
  "dataFormat": "comma",
  "smoothing": 0,
  "forecastPeriods": 0,
  "deseasonalize": true
}
  }
}

Chain multiple tools in one session with a comma-separated toolId list, e.g. /mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp (max 20).

Questions or issues? Contact [email protected]

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