Calendar

caldays integrations

Connect caldays to any other app, or use it from your AI client over MCP. caldays serves public holiday data for more than 195 countries. Callers can list the supported countries and their subdivisions, retrieve all holidays for a country and year, check whether a specific date is a public holiday or working day, and read the next upcoming holidays. Each holiday carries its date, local and English name, and whether it is nationwide or regional. No credentials required.

No account neededcaldays.com
4 actions

What the catalog holds today. Ask for anything missing and your agent reads the API documentation and adds it.

Build solutions, not workarounds.

What do you want to automate with caldays?

Ask the assistant

You'll sign in before anything runs. What you typed comes with you.

Connect your AI client

Give your AI client this address.

https://mcp.apiant.ai

One connection does both: ask your client to act in an app once, or have it build an automation that keeps running. Any client that takes a remote MCP server. Nothing to install. Create your free account, then sign in once in your browser.

Set it up in your client
Claude Code

Run this in the directory you want to work in.

claude mcp add --transport http -s project apiant-ai https://mcp.apiant.ai

Start Claude Code there, approve the server, and sign in in the browser page it opens.

Claude Code guide (opens in a new tab)
Claude, web and desktop

Open Customize, then Connectors, then Add custom connector, and paste the address. On Team and Enterprise an owner adds it first.

Setup guide (opens in a new tab)
Cursor

Add the address to your MCP configuration as a server URL. Cursor signs you in in your browser.

Setup guide (opens in a new tab)
Zed

Open Settings, then AI, then MCP Servers, then Add Server, then Add Remote Server.

Setup guide (opens in a new tab)
Codex and the ChatGPT desktop app

Open Settings, then MCP servers, then Add server, and choose Streamable HTTP. From the terminal, Codex takes the address with its own add command and then signs you in.

Setup guide (opens in a new tab)
Any other MCP client

Paste the address where the client asks for a remote MCP server URL, and name the server apiant-ai where it lets you. APIANT's skills reach the client over the same connection.

Setup guide (opens in a new tab)

Popular

caldays with the apps people pair it with most

Pair it

Connect caldays with another app

What your agent can do with caldays

Triggers and actions 4 actions

  • Action
    Get world clock

    Get current local time, DST-correct, for one or more cities and/or IANA time zones.

  • Action
    List countries

    List every country caldays covers, with its 2-letter code.

  • Action
    List holidays for country

    Get all public holidays for a country and year.

  • Action
    List long weekends for country

    List every 3+ day break (weekend + public holiday, plus bridge days worth booking off) for a country in a given year.

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Questions

caldays, answered

Is there a caldays MCP server?

APIANT's MCP server at https://mcp.apiant.ai works with caldays. Add that address to any AI client that takes a remote MCP server and sign in once in your browser. Your client can then run caldays actions on demand, or have APIANT build, test and run automations that use caldays. Nothing to install.

What can your agent do in caldays?

Any of caldays's 4 actions, including Get world clock, List countries, List holidays for country and List long weekends for country. Your agent maps the data both ways and tests every scenario before it ships.

Can I use caldays directly from Claude, ChatGPT or Cursor?

Yes. Connect your AI client to APIANT once and it works with caldays two ways. Ask it to do something in caldays once and it runs that action on the spot. Ask for an automation and your agent builds it, tests every scenario and keeps it running on its own. A one-off action uses your plan's tasks the same way an automation step does.

Do I need to write code against the caldays API?

No. APIANT connects to the caldays API for you. Describe what you want in plain language and your agent builds it on the caldays triggers and actions in the catalog. If you need an endpoint that is not there yet, your agent reads the caldays API documentation and adds it.

Which apps can caldays connect to?

Any app in the catalog; the list on this page pairs caldays with each of them. If the other app is missing, point your agent at its API documentation and it builds the connector.

What happens when something fails?

Your agent works that out for you. It plans the failure paths along with the happy path, then tests every scenario before it ships.

Is there a free plan?

Yes. Every plan includes the agent, including free, and building from your own AI client spends no assistant credits.