Integration
Connect Handwrytten to The Calendar
When something happens in Handwrytten, your agent does the next thing in The Calendar. Describe it in plain language and the automation is built, tested on every branch and kept running.
Build it
What do you want Handwrytten and The Calendar to do together?
Describe it and your agent reads both APIs, builds the automation, tests every branch and ships it. The list below is what exists today, not the limit.
Ask the assistant
You'll sign in before anything runs. What you typed comes with you.
Or work from Claude Code
Install the APIANT plugin for Claude Code and build, edit, test and read run history from your terminal. Every plan gets this, including free, and it spends no assistant credits.
Connect Claude CodeEverything your agent can do with Handwrytten and The Calendar
Triggers and actions 1 trigger ยท 12 actions
Trigger
Address ListTriggers when Recipient Addresses are needed.
- Add Order to Basket
Adds an order to a basket. If sending multiple cards at once, use this for each order, then check-out with Send Basket
- Create Contact
Creates a new address book entry for the Handwrytten address book. (Note: other zaps don't really use the address book, but the rest of Handwrytten does.).
- Create Custom Card
Creates a new custom 5x7 card with full bleed cover, using specified images, fonts, and logos.
- Empty Basket
Clears your basket.
- Find Contact
Finds a contact in your address book.
- Update Contact
Updates an entry in the Handwrytten address book.
- Upload Custom Image
Adds an image to Handwrytten for use in custom card designs.
Action
Get country holidaysReturn the list of public holidays for a given country and year. GET https://the-calendar.net/api/holidays/by-country/{country-slug}/{year}.json (~30 countries, 2026 published, e.g. united-kingdom, canada, australia, germany, japan). Response: {country, kind, year, source, holidays:[{name,date,observed,weekday,note}]}. No auth.
- Get finance calendar
Return a US finance-related date calendar for a given year and calendar type: fomc (Fed meeting dates), tax-deadlines, or market-holidays (stock market closures). GET https://the-calendar.net/api/finance/{fomc|tax-deadlines|market-holidays}/{year}.json. No auth.
- Get sports schedule
Return key schedule/calendar dates for a sports league or team. GET https://the-calendar.net/api/sports/{slug}.json where slug is one of: nfl-schedule, nba-schedule, mlb-schedule, nhl-schedule, mls-schedule, premier-league-schedule, la-liga-schedule, champions-league-schedule, f1-2026-calendar, real-madrid-calendar, fc-barcelona-calendar, manchester-united-calendar. No auth.
- Get US federal holidays
Return the list of US federal holidays for a given year. GET https://the-calendar.net/api/holidays/us-federal/{year}.json (years 2025-2028 published). Response: {country, kind, year, source, holidays:[{name,date,observed,weekday,note}]}. No auth.
- Get US state holidays
Return the list of state-observed holidays for a given US state and year. GET https://the-calendar.net/api/holidays/by-state/{state-slug}/{year}.json (all 50 states, 2026 published). Response: {country, kind, year, source, holidays:[{name,date,observed,weekday,note}]}. No auth.
No trigger or action matches that. Ask your agent to add it: it reads the API documentation and builds what you describe.