How to Use the Holiday API MCP in Google ADK

Q: How does Google ADK handle errors if the Holiday API returns an unsupported country?

Your agent should first invoke listsupportedcountries to verify the ISO code. If a model tries to query an invalid region, the server returns a standard error that the Gemini model can read and self-correct.

Q: Can I use this server to translate holiday names for local operations?

Yes, use listsupportedlanguages to find the correct locale code. The model can then fetch localized names, which is perfect for generating customer-facing alerts in their preferred language.

Feed real-time global holiday data directly to your Google ADK agents to automate complex shipping schedules in BigQuery.

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Connect Holiday API MCP to Google ADK

Create your Vinkius account to connect Holiday API to Google ADK 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 Holiday API with Google ADK

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Inject holiday data into Google ADK pipelines via MCP Server

The `get_holidays` tool retrieves official calendar closures, allowing your Gemini models to reason over multi-step logistics pipelines. By passing this tool to your agent, you prevent shipping delays caused by unexpected regional closures. Your enterprise agent can pull order dates from BigQuery, check them against local calendars, and write back corrected delivery estimates. This keeps your supply chain data accurate without manual date-checking.

Determine true business days for logistics

Measuring service level agreements across different countries requires the `get_workdays_count` tool to calculate active business days. This is critical for measuring delivery windows when your operations span dozens of countries with varying weekend schedules. Because Gemini handles massive context windows, your agent can analyze years of historical shipping data alongside these real-world holiday constraints through the MCP protocol. The resulting timeline models are grounded in actual operational days rather than simple calendar math.

Predict next available operational dates

To solve the problem of scheduling next-day shipments, the `get_next_workday` tool evaluates regional calendars and returns the precise date operations resume. This eliminates shipping backlogs during long holiday weekends. You can restrict the exposed tools using the tool_names filter on this MCP toolset if you only want your agent to handle date calculations. This keeps the agent focused and reduces token overhead during complex reasoning tasks.

Setup guide

Set up Holiday API MCP in Google ADK

Prerequisites

Python 3.10+ installed
google-adk package (pip install google-adk)
Active Vinkius subscription with a valid endpoint token

1

Install Google ADK

Run pip install google-adk to install the Agent Development Kit. MCP support is included via the McpToolset class.
2

Connect via SSE transport

Use McpToolset.from_server() with SseServerParams pointing to your Vinkius endpoint. Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com.
3

Create an LlmAgent

Pass the returned mcp_tools list directly to LlmAgent(tools=mcp_tools). The ADK maps each MCP tool to a native Gemini function call — no manual schema definitions required.
4

Run with any Gemini model

The agent works with any Gemini model (gemini-2.0-flash, gemini-2.5-pro, etc.). Copy the full example on the right to get started with Holiday API tools in your ADK agent.

agent.py

from google.adk.agents import LlmAgent
from google.adk.tools.mcp_tool.mcp_toolset import McpToolset
from google.adk.tools.mcp_tool.mcp_session_manager import SseServerParams

# Connect to the MCP via SSE
mcp_tools, exit_stack = await McpToolset.from_server(
    connection_params=SseServerParams(
        url="https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    )
)

# Create your agent with auto-discovered tools
agent = LlmAgent(
    name="Holiday API_agent",
    model="gemini-2.0-flash",
    instruction="You have access to Holiday API tools via MCP.",
    tools=mcp_tools,
)

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Common questions about Holiday API MCP in Google ADK

Instantiate McpToolset with StreamableHttpServerParameters pointing to your Vinkius URL. Pass this toolset into your LlmAgent constructor to give Gemini access to tools like `get_next_workday`.

Yes, this MCP Server supports both Stdio and HTTP transports. For cloud-hosted Google Cloud environments, we recommend using the HTTP transport to simplify network routing.

Your agent should first invoke `list_supported_countries` to verify the ISO code. If a model tries to query an invalid region, the server returns a standard error that the Gemini model can read and self-correct.

Yes, use `list_supported_languages` to find the correct locale code. The model can then fetch localized names, which is perfect for generating customer-facing alerts in their preferred language.

The server only processes generic parameters like country codes, start dates, and end dates. Your proprietary BigQuery datasets and customer records never touch the server, maintaining strict data isolation.

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