How do I find my Highnote API Key?

Log in to your Highnote dashboard, navigate to **Settings > API**, and you will be able to generate and copy your API key. Make sure to distinguish between Test and Live keys based on your environment.

What environments are supported?

The integration supports both the **Test** (Sandbox) and **Live** (Production) environments. You must specify which one you are connecting to during setup to ensure the correct API endpoints are used.

Can I freeze a card through this integration?

Yes! Use the `update_card_status` tool and set the status to `FROZEN`. This will immediately prevent any new authorizations on that card. You can set it back to `ACTIVE` to unfreeze it.

Is the integration secure for financial data?

Absolutely. The integration uses industry-standard Basic Authentication over HTTPS. Your credentials and financial data are encrypted and stored securely within the Vinkius Cloud infrastructure.

Highnote MCP Server for Google ADK 11 tools — connect in under 2 minutes

Name: Highnote
Availability: InStock
Author: Vinkius

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

Built by Vinkius GDPR 11 Tools SDK

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

Get MCP Server for AI Agents

ASK AI ABOUT THIS MCP SERVER

Open in ChatGPT Open in Claude Open in Perplexity

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="highnote_agent",
    instruction=(
        "You help users interact with Highnote "
        "using 11 available tools."
    ),
    tools=[mcp_tools],
)

Fully ManagedVinkius Servers

60%Token savings

High SecurityEnterprise-grade

IAMAccess control

EU AI ActCompliant

DLPData protection

V8 IsolateSandboxed

Ed25519Audit chain

<40msKill switch

Stream every event to Splunk, Datadog, or your own webhook in real-time

* 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 Highnote MCP Server

Connect your Highnote card platform to any AI agent and take full control of your card issuance, financial accounts, and ledger through natural conversation.

Google ADK natively supports Highnote as an MCP tool provider. declare Vinkius Edge URL and the framework handles discovery, validation, and execution automatically. Combine 11 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

Account Holder Oversight — List and retrieve details for individuals and businesses holding accounts in your program.
Card Management — List virtual and physical cards, monitor their operational status, and freeze or close them directly from the chat.
Financial Account Monitoring — Access real-time balances and metadata for all your financial ledger accounts.
Transaction Tracking — List and inspect recent spending and processing transactions with detailed merchant metadata.
Ledger Insights — Retrieve individual ledger entries for reconciliation and audit purposes.
Program Visibility — List all available card products and programs configured in your Highnote account.

The Highnote MCP Server exposes 11 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 Highnote to Google ADK via MCP

Follow these steps to integrate the Highnote 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 11 tools from Highnote via MCP

Why Use Google ADK with the Highnote MCP Server

Google ADK provides unique advantages when paired with Highnote 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 Highnote

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 Highnote tools with BigQuery, Vertex AI, and Cloud Functions

Highnote + Google ADK Use Cases

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

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

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

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

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

Highnote MCP Tools for Google ADK (11)

These 11 tools become available when you connect Highnote to Google ADK via MCP:

get_api_profile

Retrieve information about the authenticated API user

get_financial_account

Get detailed balance and metadata for a specific financial account

get_payment_card_details

Get detailed information for a specific card

get_transaction_details

Get detailed metadata for a specific transaction

list_account_holders

Use this to find the unique ID for a person or business. List individuals and businesses who hold accounts in Highnote

list_card_products

List the different card programs (e.g., Consumer, Fleet) available in your Highnote account

list_financial_accounts

List all financial accounts and their current balances

list_financial_transactions

List recent spending and processing transactions

list_ledger_entries

Useful for reconciliation. List individual ledger entries for a financial account

list_payment_cards

Monitor card status and expiration details. List virtual and physical cards issued in your program

update_card_status

Valid statuses: ACTIVE, FROZEN, CLOSED. Change the status of a card (e.g., ACTIVE, FROZEN, CLOSED)

Example Prompts for Highnote in Google ADK

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

"List all financial accounts and show their current balances."

"Show the last 5 transactions for card ending in 4492."

"Freeze card ID 'card_992' immediately."

Troubleshooting Highnote MCP Server with Google ADK

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

McpToolset not found

Update: pip install --upgrade google-adk

Highnote + Google ADK FAQ

Common questions about integrating Highnote 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.