How to Use the Nager.Date MCP in Mastra AI

Q: How do I build conditional branches in Mastra AI based on Nager.Date data?

You write a step that calls isholidaytoday and use Mastra's routing engine to branch your workflow. If the step returns true, you can route the process to a pause state; if false, you proceed with immediate dispatch.

Build automated, resilient holiday-aware workflows in Mastra AI using global calendar data.

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Connect Nager.Date MCP to Mastra AI

Create your Vinkius account to connect Nager.Date to Mastra AI and route execution through our secure gateway. The platform manages server hosting, runtime updates, and security layers. Configuration requires no manual server provisioning.

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Setup Nager.Date with Mastra AI

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Automated billing retries in Mastra AI

Your agent executes `is_holiday_today` to determine if a failed payment occurred on a bank holiday. Mastra AI then branches the workflow, delaying the retry attempt until the next business day instead of spamming the user. This logic uses `get_country_details` to verify banking hours across different jurisdictions. You prevent unnecessary card declines and customer support tickets by adjusting your retry intervals dynamically.

Multi-step logistics routing with this MCP Server

Your agent runs `get_next_holidays` to map out transit paths for time-sensitive cargo. Mastra AI coordinates the shipping steps, automatically rerouting packages through alternative hubs if a primary port is closed. If the API call fails, Mastra's built-in retry engine handles the timeout without crashing your pipeline. The agent continues checking `get_public_holidays` for each transit country to guarantee on-time arrivals.

Global operational health checks

Your agent triggers `get_next_holidays_worldwide` to generate weekly operational reports for international teams. Mastra AI schedules these tasks, running the checks in the background and alerting managers about upcoming office closures. The system relies on `list_available_countries` to maintain an accurate directory of regional offices. This ensures your operations team never gets caught off guard by regional events they weren't tracking.

Setup guide

Set up Nager.Date MCP in Mastra AI

Prerequisites

Node.js 18+ and a TypeScript project
@mastra/mcp + @mastra/core packages
Active Vinkius subscription with a valid endpoint token

1

Install dependencies
Run npm install @mastra/mcp @mastra/core plus your preferred model provider (e.g. @ai-sdk/openai).
2

Configure the MCPClient
Create an MCPClient with your Vinkius endpoint as a URL object. Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com.
3

Discover and inject tools
Call mcpClient.listTools() and spread the result into your agent's tools object. All Nager.Date tools become native Mastra tools.
4

Run with any model
Swap openai("gpt-4o") for any AI SDK-compatible provider. Call agent.generate() and the agent routes tool calls through MCP automatically.

agent.ts

import { MCPClient } from "@mastra/mcp";
import { Agent } from "@mastra/core/agent";
import { openai } from "@ai-sdk/openai";

const mcpClient = new MCPClient({
  id: "nagerdate-mcp-client",
  servers: {
    "nagerdate-mcp": {
      url: new URL(
        "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
      ),
    },
  },
});

const agent = new Agent({
  name: "Nager.Date Agent",
  model: openai("gpt-4o"),
  instructions: "You have access to Nager.Date tools.",
  tools: {
    ...(await mcpClient.listTools()),
  },
});

const result = await agent.generate(
  "List recent Nager.Date transactions"
);
console.log(result.text);

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Common questions about Nager.Date MCP in Mastra AI

You instantiate the client, fetch the tool list using the standard MCP protocol, and spread them into your agent's tool configuration. The agent can then call `get_public_holidays` to make decisions during execution.

Yes, Mastra AI has a built-in workflow engine that automatically retries failed calls to `get_next_holidays` with exponential backoff. This keeps your automated shipping pipelines running even if the public API experiences temporary downtime.

You write a step that calls `is_holiday_today` and use Mastra's routing engine to branch your workflow. If the step returns true, you can route the process to a pause state; if false, you proceed with immediate dispatch.

No. The server relies on the official public database to return dates. For custom corporate holidays, you must combine this toolset with your own internal database inside the workflow.

The server only transmits standard ISO country codes and year parameters. No user identifiers, session tokens, or private transaction records are processed or exposed during calendar queries.

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