Integration
Connect FreeAgent to The Calendar
When something happens in FreeAgent, 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 FreeAgent 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 FreeAgent and The Calendar
Triggers and actions 3 triggers · 20 actions
Trigger
New ContactTriggers when a new contact is created (polling, newest first).
- New Invoice
Triggers when a new invoice is created (polling, newest first).
- New Project
Triggers when a new project is created (polling, newest first).
- Create Contact
Create a new contact.
- Create Invoice
Create an invoice for a contact.
- Create Project
Create a project for a contact.
- Create Timeslip
Create a timeslip (time tracking entry).
- Delete Contact
Delete a contact by id.
- Get Contact
Get a single contact by id.
- Get Invoice
Get a single invoice by id.
- List Bills
List bills.
- List Contacts
List contacts in FreeAgent.
- List Estimates
List estimates.
- List Expenses
List expenses.
- List Invoices
List invoices.
- List Projects
List projects.
- List Timeslips
List timeslips (time tracking entries).
- Update Contact
Update an existing contact.
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.