Halowerk Calendar & Workdays API

x402

Halowerk Calendar & Workdays API is a paid API for AI agents from tools.halowerk.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).

Returns public holiday lists by German/Austrian/Swiss federal state, checks if a date is a workday, calculates workdays between two dates, adds workdays to a date, and returns timezone offsets including DST.

Price / call$0.001

Seller volume →—

Success—

StatusUnknown

How this service works

Feiertagsliste je Bundesland für DE, AT und CH, Werktagsprüfung, Werktage zwischen zwei Daten, Werktage addieren und Zeitzonen-Offset inklusive Sommerzeit.

Output

Returns structured data including: public holiday lists with names and dates for the requested state/country, a boolean workday flag for a specific date, the count of workdays between two dates, a resulting date after adding N workdays, and/or a timezone offset value in hours/minutes including DST correction.

Example use cases

Payment deadline calculation for German invoices

“I need to add 14 workdays to the invoice date November 4, 2025 for a client in North Rhine-Westphalia, Germany — what date does that land on, accounting for public holidays in that state?”

Cross-border project planning for DACH region

“How many working days are there between December 20, 2025 and January 10, 2026 in Bavaria, Germany, and in Zurich, Switzerland? I need to plan a project timeline that respects holidays in both countries.”

Automated holiday calendar for HR software

“Give me the full list of public holidays for 2026 in the Austrian state of Tyrol so I can load them into our HR system.”

Technical details

Endpoint

POSThttps://tools.halowerk.com/v1/calendar/workdays

When to prefer

Choose this endpoint when you need DACH-region (Germany, Austria, Switzerland) specific public holiday data at the federal-state (Bundesland/Kanton) level, or when you need to calculate business days, add workdays to a date, or get DST-aware timezone offsets for these countries. It is more precise than generic global calendar APIs because it has granular Bundesland-level holiday data for all three countries.

Side effects

Invalid or unsupported country code returns an error
Unsupported Bundesland/canton identifier causes validation failure
Date format mismatch leads to parsing error
Future years beyond available holiday data may return incomplete results
Missing required fields in POST body returns 400 Bad Request

Input

Schema · Request body

Field	Type	Description
to	string
date	string	ISO-Datum für Werktagsprüfung
from	string
year	integer
region	string	Bundeslandkürzel, z. B. NW, BY, SN
country	string
timezone	string
add_workdays	integer	Werktage auf date addieren

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