Integration
Connect Manifestly Checklists Agent to The Calendar
When something happens in Manifestly Checklists Agent, 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 Manifestly Checklists Agent 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 Manifestly Checklists Agent and The Calendar
Triggers and actions 1 trigger ยท 10 actions
Trigger
Run LateTriggers when a run is late.
- Change Step State
Completes, reopens, skips, starts, stops or stores data on a step of a Manifestly checklist run.
- Get Run
Look up one checklist run by its id and return its current details, including its title, state, progress, notes, tags and the workflow it came from.
- List Run Steps
Returns the steps of a checklist run
- List Workflows
Returns the checklist workflows in your Manifestly account.
- Run Workflow
Starts a new run of a Manifestly checklist workflow, optionally naming it, scheduling it and assigning the people who take part.
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.