How to Use the Highnote MCP in OpenAI Agents SDK

Q: How do I use Highnote with the OpenAI Agents SDK to freeze a card?

Your agent would call the updatecardstatus tool with the card's ID and the status 'FROZEN'. You can configure the SDK to require human approval for this specific action, adding a layer of safety.

Q: What's the best way to list Highnote card products with an OpenAI agent?

Just ask the agent to do it. It will identify and use the listcardproducts tool to return a list of available card programs, like 'Consumer' or 'Fleet'.

Build production-grade financial agents with Highnote and the OpenAI Agents SDK, complete with guardrails and full tracing.

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Connect Highnote MCP to OpenAI Agents SDK

Create your Vinkius account to connect Highnote to OpenAI Agents SDK 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 Highnote with OpenAI Agents SDK

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Automate Card Management Safely

Give your agent the tools to manage the entire card lifecycle. It can see available programs with `list_card_products`, find a specific card with `list_payment_cards`, and then pull its full details using `get_payment_card_details`. Here’s the thing: financial operations need oversight. The OpenAI SDK's built-in guardrails let you require human approval before an agent can execute a sensitive action. This means you can prevent an agent from mistakenly using `update_card_status` to freeze an active account without a person signing off on it first.

Get a Full Audit Trail for Every Action

Your agent can now answer complex financial questions. It can pull account balances with `get_financial_account` and comb through spending history using `list_financial_transactions`. Because you're using the OpenAI Agents SDK, every call to this MCP server is automatically logged in your OpenAI dashboard. You get a complete, traceable record of which agent accessed what data, and when. That's your audit trail for compliance, ready with zero extra work.

Connect Agents to Specific Account Holders

Stop guessing at user IDs. Your agent uses `list_account_holders` to find the exact person or business it needs to work with. No more ambiguity. This is perfect for multi-agent systems. A generalist agent can handle the initial user interaction and find the account holder ID. Then, it can hand off to a specialized financial agent that uses the ID to perform specific tasks like checking transaction history with `get_transaction_details`.

Setup guide

Set up Highnote MCP in OpenAI Agents SDK

Prerequisites

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

1

Install the SDK

Run pip install openai-agents to install the OpenAI Agents SDK. The MCP integration is built-in — no extra dependencies needed.
2

Connect via SSE transport

Use MCPServerSse with your Vinkius endpoint URL. Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com. The SDK auto-discovers all Highnote tools at runtime.
3

Create your Agent

Pass the MCP to Agent(mcp_servers=[server]). The agent receives Highnote tools as native definitions — JSON schemas resolve automatically.
4

Run the agent

Call Runner.run(agent, prompt) to execute. The agent invokes the appropriate Highnote tools and returns structured results. Copy the full example on the right to get started.

agent.py

import asyncio
from agents import Agent, Runner
from agents.mcp import MCPServerSse

async def main():
    async with MCPServerSse(
        url="https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    ) as server:
        agent = Agent(
            name="Highnote Agent",
            instructions="You have access to Highnote tools.",
            mcp_servers=[server],
        )
        result = await Runner.run(agent, "List recent transactions")
        print(result.final_output)

asyncio.run(main())

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Common questions about Highnote MCP in OpenAI Agents SDK

Your agent would call the `update_card_status` tool with the card's ID and the status 'FROZEN'. You can configure the SDK to require human approval for this specific action, adding a layer of safety.

Yes. The OpenAI Agents SDK automatically traces every tool call. Any action your agent takes with the Highnote tools, like `list_payment_cards` or `get_transaction_details`, will appear in your dashboard's logs.

It's automatic. When you pass the Highnote MCP Server to the Agent constructor, the SDK introspects the server to find all 11 available tools and their parameters. You don't need to define them manually.

Just ask the agent to do it. It will identify and use the `list_card_products` tool to return a list of available card programs, like 'Consumer' or 'Fleet'.

Yes. Your connection to the Highnote MCP server is authenticated through a single Vinkius token. All data in transit, including card details and transaction history, is encrypted. The OpenAI dashboard provides a full audit trail of data access, but the raw data itself is handled within Vinkius's ephemeral, zero-trust environment.

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