isHoliday

Returns all holidays that fall on a given date, optionally restricted to one country. Requires a date. For a full year's calendar use /v2/holidays.

SERVERAPI Ninjas SOURCEhttps://mcp.api-ninjas.com/mcp

Low RISK CLASS

Category Read

Parameters 21 required

Recommended Allowedsee the rule below

Registry record Grade D, identity unverified Pull the record →

This record as markdown: /tools/com-api-ninjas-mcp/isholiday.md

WHAT IT DOES

What isHoliday does on API Ninjas

AI agents call isHoliday to retrieve information from API Ninjas without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

Parameter	Type	Required	Description
`date`	string	Yes	Date in YYYY-MM-DD format (e.g. 2025-12-25). Note: dates in future calendar years are for premium subscribers only.
`country`	string	—	Country name or ISO 3166-2 country code (preferred). If not specified, holidays from all countries are returned.

Parameters from the server's own tool schema.

RISK

Why isHoliday is rated Low

Even though isHoliday only reads data, uncontrolled read access leaks sensitive information and racks up API costs: an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs isHoliday safely

PolicyLayer is an MCP gateway: it sits between your AI agents and API Ninjas, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For isHoliday, this is the rule to start with:

isHoliday Allowed

isHoliday is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "isHoliday": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect API Ninjas, apply this rule, and every isHoliday call is checked against it from then on.

FAQ

Questions about isHoliday

What does the isHoliday tool do? +

Returns all holidays that fall on a given date, optionally restricted to one country. Requires a date. For a full year's calendar use /v2/holidays. It is categorised as a Read tool in the API Ninjas MCP Server, which means it retrieves data without modifying state.

What parameters does isHoliday accept? +

isHoliday accepts 2 parameters: date, country. Required: date. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on isHoliday? +

Register the API Ninjas MCP server in PolicyLayer and add a rule for isHoliday: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches API Ninjas. Nothing to install.

What risk level is isHoliday? +

isHoliday is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit isHoliday? +

Yes. Add a rate_limit block to the isHoliday rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block isHoliday completely? +

Set action: deny in the PolicyLayer policy for isHoliday. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides isHoliday? +

isHoliday is provided by the API Ninjas MCP server (https://mcp.api-ninjas.com/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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