Utilities
Week Number Calculator
Calculate the week number of a date within a year. Supports different week number calculation standards (ISO 8601, US standard, etc.) for project management, time planning, and data analysis.
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Quick start
Call this tool from your code in three languages.
cURL
curl -X POST 'https://api.elysiatools.com/en/api/tools/week-number-calculator' \
-H 'Content-Type: application/json' \
-d '{"dateInput":"Enter date(s) - one per line for multiple dates (e.g., \"2024-01-01\", \"Jan 15, 2024\", \"today\")","weekStandard":"iso","multipleDates":false,"outputFormat":"list","includeDateInfo":true,"startOfWeek":"auto","firstWeekContains":"auto"}'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/week-number-calculatorParameters
| Name | Type | Required | Description |
|---|---|---|---|
| dateInput | textarea | Yes | — |
| weekStandard | select | Yes | — |
| multipleDates | checkbox | No | Process multiple dates (one per line) |
| outputFormat | select | Yes | — |
| includeDateInfo | checkbox | No | Include additional date details like quarter, day of year, leap year info |
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-week-number-calculator": {
"name": "week-number-calculator",
"description": "Calculate the week number of a date within a year. Supports different week number calculation standards (ISO 8601, US standard, etc.) for project management, time planning, and data analysis.",
"baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=week-number-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": "week-number-calculator",
"arguments": {
"dateInput": "Enter date(s) - one per line for multiple dates (e.g., \"2024-01-01\", \"Jan 15, 2024\", \"today\")",
"weekStandard": "iso",
"multipleDates": false,
"outputFormat": "list",
"includeDateInfo": true,
"startOfWeek": "auto",
"firstWeekContains": "auto"
}
}
}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).