Date & Time

ISO 8601 Duration Parser & Arithmetic Workbench

Parse ISO 8601 durations, validate ISO 8601-2 extensions, run calendar-true arithmetic, sort by real length at an anchor, and diff datetimes.

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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/iso-8601-duration-parser-arithmetic-workbench' \
  -H 'Content-Type: application/json' \
  -d '{"mode":"parse","durationsInput":"P1Y2M3DT4H5M6S\nP3W\nPT36H\n-PT30M\nP0D\nP2W3D","anchorDatetime":"2026-01-15T00:00:00Z","datetimeA":"2026-01-01T00:00:00Z (diff mode)","datetimeB":"2026-02-15T12:30:00Z (diff mode)"}'

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/iso-8601-duration-parser-arithmetic-workbench

Parameters

Name	Type	Required	Description
mode	select	Yes	—
durationsInput	textarea	No	—
anchorDatetime	text	No	—
datetimeA	text	No	—
datetimeB	text	No	—

Response format

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-iso-8601-duration-parser-arithmetic-workbench": {
      "name": "iso-8601-duration-parser-arithmetic-workbench",
      "description": "Parse ISO 8601 durations, validate ISO 8601-2 extensions, run calendar-true arithmetic, sort by real length at an anchor, and diff datetimes.",
      "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=iso-8601-duration-parser-arithmetic-workbench",
      "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": "iso-8601-duration-parser-arithmetic-workbench",
    "arguments": {
  "mode": "parse",
  "durationsInput": "P1Y2M3DT4H5M6S\nP3W\nPT36H\n-PT30M\nP0D\nP2W3D",
  "anchorDatetime": "2026-01-15T00:00:00Z",
  "datetimeA": "2026-01-01T00:00:00Z (diff mode)",
  "datetimeB": "2026-02-15T12:30:00Z (diff mode)"
}
  }
}

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).

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