Public holiday and business-day calendar for US and UK
Public holiday and business-day calendar for US and UK: is a date a business day, add N business days, count business days between dates (net of holidays), and list a year's holidays. $0.01 per call in USDC on Base via x402.
Answeringour last check, 2026-10-31
1 of 1checks answered this week
860 msmedian answer time
$0.01listed price per call
$0.01price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
GET https://api.firstmention.uk/s/bizcal-api/between
| Category | Everything else |
|---|---|
| Provider host | api.firstmention.uk |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-31 | valid payment request | 402 | $0.01 | 860 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"country": "US",
"end": "2026-12-05",
"start": "2026-11-20"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"headers": {
"additionalProperties": {
"type": "string"
},
"type": "object"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"properties": {
"country": {
"description": "US federal or UK England & Wales holidays",
"enum": [
"US",
"GB"
],
"type": "string"
},
"end": {
"description": "YYYY-MM-DD",
"format": "date",
"type": "string"
},
"start": {
"description": "YYYY-MM-DD",
"format": "date",
"type": "string"
}
},
"required": [
"country",
"start",
"end"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"business_days": {
"type": "number"
},
"calendar_days": {
"type": "number"
},
"country": {
"type": "string"
},
"end": {
"type": "string"
},
"holidays": {
"items": {
"properties": {
"date": {
"type": "string"
},
"name": {
"type": "string"
},
"weekday": {
"type": "string"
}
},
"type": "object"
},
"type": "array"
},
"note": {
"type": "string"
},
"start": {
"type": "string"
},
"weekday_holidays": {
"type": "number"
},
"weekend_days": {
"type": "number"
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}