Overview
Date Math: Rolling stay-limit math such as the Schengen 90/180 rule: days used in the window, days left, overstay check, the longest stay allowed from a planned entry date, and the next date a full stay is possible. Entry and exit days both count. Custom rules via max_days/window_days. Use for travel planning, visa-free stays and "can I enter on".
Protocol
x402 (POST)
Price
$0.0010
Payment Asset
USD Coin
Payment Network
eip155:8453
Category
uncategorized
Provider
Date Math
Indexed
2026-11-08 04:08:36
Health
Status
unknown
Latency (p50)
—
Uptime (30d)
—
Reliability Score
—
Last Checked
Never
Last Healthy
Never
Consecutive Failures
0
Input Schema
{
"body": {
"date": "2026-10-01",
"entry": "2026-11-01",
"trips": [
{
"entry": "2026-06-01",
"exit": "2026-07-15"
},
{
"entry": "2026-09-10",
"exit": "2026-09-30"
}
]
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Output Schema
{
"example": {
"date": "2026-10-01",
"days_remaining": 24,
"days_used": 66,
"first_overstay": null,
"in_compliance": true,
"max_stay": {
"days_allowed": 24,
"entry": "2026-11-01",
"latest_exit": "2026-11-24"
},
"next_full_stay_date": "2026-12-30",
"note": "Entry and exit days both count. A planning aid; border officials and the official calculator have the final say.",
"overstay_days": 0,
"rule": {
"max_days": 90,
"window_days": 180,
"window_end": "2026-10-01",
"window_start": "2026-04-05"
}
},
"type": "json"
}