Is an API Key required for REST Countries?

No. REST Countries is a free and open service. This server works out of the box without any static credentials required.

Can the agent search for countries by currency?

Yes. Use the `get_countries_by_currency` tool providing the currency code (e.g., 'EUR'). Your agent will return all countries using that specific currency instantly.

Is population data included?

Yes. Every country record retrieved by your agent includes the most recent official population count available in the database.

REST Countries MCP Server for Google ADK 6 tools — connect in under 2 minutes

Name: REST Countries
Availability: InStock
Author: Vinkius

google.github.io/adk-docs/tools/mcp-tools

Built by Vinkius GDPR 6 Tools SDK

Google Agent Development Kit (ADK) is Google's framework for building production AI agents. Add REST Countries as an MCP tool provider through Vinkius and your ADK agents can call every tool with full schema introspection.

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Vinkius supports streamable HTTP and SSE.

python

from google.adk.agents import Agent
from google.adk.tools.mcp_tool import McpToolset
from google.adk.tools.mcp_tool.mcp_session_manager import (
    StreamableHTTPConnectionParams,
)

# Your Vinkius token. get it at cloud.vinkius.com
mcp_tools = McpToolset(
    connection_params=StreamableHTTPConnectionParams(
        url="https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp",
    )
)

agent = Agent(
    model="gemini-2.5-pro",
    name="rest_countries_agent",
    instruction=(
        "You help users interact with REST Countries "
        "using 6 available tools."
    ),
    tools=[mcp_tools],
)

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* Every MCP server runs on Vinkius-managed infrastructure inside AWS - a purpose-built runtime with per-request V8 isolates, Ed25519 signed audit chains, and sub-40ms cold starts optimized for native MCP execution. See our infrastructure

About REST Countries MCP Server

Empower your AI agent to orchestrate your entire global research workflow with REST Countries, the authoritative source for geographic and geopolitical data. By connecting REST Countries to your agent, you transform complex demographic searches into a natural conversation. Your agent can instantly search for countries, audit currency distributions, and retrieve language metadata without you ever touching a technical database. Whether you are conducting market expansion research or building global applications, your agent acts as a real-time geographic consultant, ensuring your data is always comprehensive and well-categorized.

Google ADK natively supports REST Countries as an MCP tool provider. declare Vinkius Edge URL and the framework handles discovery, validation, and execution automatically. Combine 6 tools with Gemini's long-context reasoning for complex multi-tool workflows, with production-ready session management and evaluation built in.

What you can do

Country Auditing — Search for any country by its common or official name and retrieve detailed metadata, including capitals and population counts.
Regional Oversight — Browse countries by region or subregion to maintain a clear view of global geographic distributions.
Economic Intelligence — Query countries by currency to understand the reach of specific financial systems instantly.
Linguistic Discovery — Retrieve lists of countries that speak specific languages to assist in localization planning.
Spatial Discovery — Retrieve official flags and geographic coordinates for any country ID to maintain visual and spatial context.

The REST Countries MCP Server exposes 6 tools through the Vinkius. Connect it to Google ADK in under two minutes — no API keys to rotate, no infrastructure to provision, no vendor lock-in. Your configuration, your data, your control.

How to Connect REST Countries to Google ADK via MCP

Follow these steps to integrate the REST Countries MCP Server with Google ADK.

Install Google ADK

Run pip install google-adk

Replace the token

Replace [YOUR_TOKEN_HERE] with your Vinkius token

Create the agent

Save the code above and integrate into your ADK workflow

Explore tools

The agent will discover 6 tools from REST Countries via MCP

Why Use Google ADK with the REST Countries MCP Server

Google ADK provides unique advantages when paired with REST Countries through the Model Context Protocol.

Google ADK natively supports MCP tool servers. declare a tool provider and the framework handles discovery, validation, and execution

Built on Gemini models, ADK provides long-context reasoning ideal for complex multi-tool workflows with REST Countries

Production-ready features like session management, evaluation, and deployment come built-in. not bolted on

Seamless integration with Google Cloud services means you can combine REST Countries tools with BigQuery, Vertex AI, and Cloud Functions

REST Countries + Google ADK Use Cases

Practical scenarios where Google ADK combined with the REST Countries MCP Server delivers measurable value.

Enterprise data agents: ADK agents query REST Countries and cross-reference results with internal databases for comprehensive analysis

Multi-modal workflows: combine REST Countries tool responses with Gemini's vision and language capabilities in a single agent

Automated compliance checks: schedule ADK agents to query REST Countries regularly and flag policy violations or configuration drift

Internal tool platforms: build self-service agent platforms where teams connect their own MCP servers including REST Countries

REST Countries MCP Tools for Google ADK (6)

These 6 tools become available when you connect REST Countries to Google ADK via MCP:

get_all_countries

Get a list of all countries in the world

get_countries_by_currency

List countries that use a specific currency

get_countries_by_language

List countries that speak a specific language

get_countries_by_region

List countries in a specific region or subregion

get_country_by_code

Search for a country by its ISO alpha-2 or alpha-3 code

get_country_by_name

Search for a country by its common or official name

Example Prompts for REST Countries in Google ADK

Ready-to-use prompts you can give your Google ADK agent to start working with REST Countries immediately.

"Search for the country 'Brazil' using REST Countries."

"List all countries in the region 'Europe'."

"Which countries speak 'Spanish'?"

Troubleshooting REST Countries MCP Server with Google ADK

Common issues when connecting REST Countries to Google ADK through the Vinkius, and how to resolve them.

McpToolset not found

Update: pip install --upgrade google-adk

REST Countries + Google ADK FAQ

Common questions about integrating REST Countries MCP Server with Google ADK.

How does Google ADK connect to MCP servers?

Import the MCP toolset class and pass the server URL. ADK discovers and registers all tools automatically, making them available to your agent's tool-use loop.

Can ADK agents use multiple MCP servers?

Yes. Declare multiple MCP tool providers in your agent configuration. ADK merges all tool schemas and the agent can call tools from any server in a single turn.

Which Gemini models work best with MCP tools?

Gemini 2.0 Flash and Pro models both support function calling required for MCP tools. Flash is recommended for latency-sensitive use cases, Pro for complex reasoning.