# Polystash API

> Public holidays and business-day calculations for 224 countries and territories; trading calendars for 31 exchanges and payment value dates for 7 schemes.

Calendars cover 2000–2060 subject to coverage flags and endpoint limits. Regional coverage varies. Generated future dates can change with official announcements.

Customers use RapidAPI subscriptions and their own X-RapidAPI-Key. The two products have different gateway hosts. Direct data requests to api.polystash.com are restricted; the documentation is public. See the quick start for the correct request hosts.

## Documentation

- [Quick start](https://api.polystash.com/quickstart.md): Plain Markdown instructions, gateway hosts and cURL examples for both products.
- [OpenAPI schema](https://api.polystash.com/openapi.json): Path, parameter and response definitions. Its server URL is the provider origin; use the subscribed product's RapidAPI host for customer calls. The schema also contains routes not offered by these listings.
- [Full reference](https://api.polystash.com/docs): HTML endpoint reference, coverage notes and sources.
- [Reference calendars and calculators](https://polystash.com/llms.txt): Guide to the free website.

## Products and access

- [Business Days and Public Holidays](https://rapidapi.com/polystash-polystash-default/api/business-days-and-public-holidays1): Holiday lookup, add/count business days, SLA deadlines and iCalendar feeds. Separate RapidAPI subscription; free tier available.
- [Settlement Calendar and Payment Value Dates](https://rapidapi.com/polystash-polystash-default/api/settlement-calendar-and-payment-value-dates): Exchange sessions, settlement arithmetic and payment cutoffs. Separate RapidAPI subscription; free tier available.
- [API pricing](https://api.polystash.com/pricing): Current plan comparison; confirm quotas and prices on the marketplace before subscribing.
- [Buy the dataset — $9 one-off](https://polystash.gumroad.com/l/public-holidays-business-days-2000-2060): Download holiday data for 2000–2060 as CSV, Parquet and iCalendar files.
- [Free holiday CSV sample](https://www.kaggle.com/datasets/polystash/public-holidays-by-country-and-region-2026-2028): Sample for 2026–2028 with country and regional reference tables.