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 HTTP endpoint POST /api/tools/relationship-calculator/execute. See the MCP reference →
Call it over REST
POST https://api.findutils.com/api/tools/relationship-calculator/execute · no API keys · 60 requests/min per IP
Execute — verified arguments
curl -X POST https://api.findutils.com/api/tools/relationship-calculator/execute \
-H "Content-Type: application/json" \
-d '{
"start_date": "2024-02-14",
"target_date": "2026-04-18"
}'Parameter schema for this endpoint
curl https://api.findutils.com/api/tools/relationship-calculatorInput 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 an MCP tool
Claude, Cursor, and any MCP client can call this tool as
findutils:relationship_calculator after one connect command.
Connect once
claude mcp add findutils --transport http https://mcp.findutils.com/More Datetime tools
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