Relationship Calculator

Datetime REST API MCP

Calculate how long a relationship has lasted between a start date and a target date: years/months/days, totals in days, weeks, months, hours, minutes, and seconds, the weekday it started, the next anniversary, and passed/upcoming milestones (100 days to 10 years).

This page documents the MCP tool findutils:relationship_calculator. See the REST reference →

Use in the browser View as Markdown

Call it over MCP

Tool name findutils:relationship_calculator · no API keys · 120 requests/min per IP

Claude Code

claude mcp add findutils --transport http https://mcp.findutils.com/

Claude Desktop — claude_desktop_config.json

{
  "mcpServers": {
    "findutils": {
      "url": "https://mcp.findutils.com/"
    }
  }
}

Raw JSON-RPC (any MCP client) — verified example

curl -X POST https://mcp.findutils.com/ \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "tools/call",
    "params": {
      "name": "relationship_calculator",
      "arguments": {
        "start_date": "2024-02-14",
        "target_date": "2026-04-18"
      }
    }
  }'

Input schema

Argument	Type	Required	Description
start_date	string	yes	Relationship start date (YYYY-MM-DD).
target_date	string	no	Date to measure against (YYYY-MM-DD). Default: today (UTC).

Example arguments (verified)

{
  "start_date": "2024-02-14",
  "target_date": "2026-04-18"
}

Also a REST endpoint

The same tool answers plain HTTP at POST /api/tools/relationship-calculator/execute — no key, 60 requests/min.

Open the REST reference for Relationship Calculator →

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