API reference

Base URL: https://api.financecalendarapi.com. Every endpoint is a GET and needs an API key.

Endpoint	What it answers
/v1/calendars	List calendars
/v1/calendars/{id}	Calendar detail, with the sources behind its verified dates
/v1/days/{date}	Is this date a business day, in each calendar and combined?
/v1/holidays	Holidays, early closes and weekend working days in a date range
/v1/holidays/next	The next N holidays and early closes from a date
/v1/business-days/next	Next business day after a date
/v1/business-days/previous	Previous business day before a date
/v1/business-days/add	T+N: move N business days (N can be negative; N=0 checks the date itself)
/v1/business-days/count	Business days from from (counted) to to (not counted)
/v1/changes	Dates added, removed or modified by each release
/v1/calendars/{id}.ics	A calendar as an iCalendar feed, to subscribe to

The machine-readable description is at /v1/openapi.json.