How to Use the Unit & FX Calculator MCP in OpenAI Agents SDK

Q: Can I run multiple conversions at once using Unit & FX Calculator with OpenAI Agents SDK?

Yep. The batchconvert function lets you pass values, source units, and target units for several items in one deterministic pass. This is much faster than calling the conversion tool multiple times.

Q: Will the Unit & FX Calculator help me avoid hallucinating exchange rates with OpenAI Agents SDK?

Yes. The getrate tool uses a live Frankfurter API feed, giving you the exact current rate. This stops your agent from guessing or mixing up currency data.

Get precise units and live currency rates using the OpenAI Agents SDK.

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Connect Unit & FX Calculator MCP to OpenAI Agents SDK

Create your Vinkius account to connect Unit & FX Calculator 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 Unit & FX Calculator with OpenAI Agents SDK

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Deterministic Math with MCP Server

Need to convert physical measurements? Don't risk mixing up metric and imperial systems. You call `convert_unit` and it deterministically converts values—like turning km/h into mph—using mathjs. It handles the math so you don't have to worry about rounding or wrong formulas. We also use `batch_convert`, which is perfect when you need to convert multiple units in one shot, saving several API calls and making your agent run cleaner.

Live Exchange Rates for OpenAI Agents SDK

Dealing with international transactions? The `get_rate` tool fetches the precise foreign exchange rate between any two currencies using a cached Frankfurter API. This isn't an estimate; it gives you the current, exact rate needed for your agent to process payments or reports. Because this tool caches rates for one hour, your agents get speed without sacrificing accuracy. It keeps your calls efficient while ensuring financial data is spot-on.

Robust Data Validation via MCP Server

The agent needs reliable numbers, period. This server forces mathematical conversions and rate fetching to be deterministic processes. Your agent client can trust that the output from tools like `convert_unit` won't include any hallucinated data or mixed-up units. When you pass a value, source unit, and target unit for conversion via `batch_convert`, it just spits out an exact number. This guardrail function makes your production agent system much safer.

Setup guide

Set up Unit & FX Calculator 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 Unit & FX Calculator tools at runtime.
3

Create your Agent

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

Run the agent

Call Runner.run(agent, prompt) to execute. The agent invokes the appropriate Unit & FX Calculator 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="Unit & FX Calculator Agent",
            instructions="You have access to Unit & FX Calculator 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 Unit & FX Calculator MCP in OpenAI Agents SDK

The OpenAI Agents SDK lets you treat the unit calculation and currency lookup as simple, auto-discovered tools. Your agent determines when it needs a conversion or a rate, calls the appropriate tool (`convert_unit` or `get_rate`), and uses the result to complete its task.

Yep. The `batch_convert` function lets you pass values, source units, and target units for several items in one deterministic pass. This is much faster than calling the conversion tool multiple times.

It primarily touches Measurement (for physical conversions) and Currency (for exchange rates). The server reads these types to perform its math, ensuring your agent handles both types correctly.

Absolutely. Because it provides deterministic conversion and live rate fetching, it's built for reliable, deployed products. It keeps rates cached to improve performance while maintaining accuracy.

Yes. The `get_rate` tool uses a live Frankfurter API feed, giving you the exact current rate. This stops your agent from guessing or mixing up currency data.

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