How to Use the ISS Calculator MCP in AutoGen

Q: How do I load the ISS Calculator in AutoGen?

Install the autogen-extmcp package. Use mcpservertools with your StreamableHttpServerParams to pass the tools to your AssistantAgent.

Deploy AutoGen MCP agent teams that debate and resolve Brazilian tax rules.

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Setup ISS Calculator with AutoGen

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Agents compute exact tax burdens

The `calculate_tax_liability` tool gives your financial agents the ability to run the final numbers on Brazilian service invoices. A billing agent calculates the amount while a compliance agent verifies the math. This MCP prevents single-agent arithmetic errors. Your AutoGen setup forces multiple agents to agree on the final currency figure before approving the invoice draft.

Negotiate municipal tax disputes via MCP

Your legal agent calls `get_applicable_rate` to fetch the baseline percentage for a specific city. It retrieves the exact local tax bracket for the provided service code. If the service happened in a different city than the company headquarters, your agents debate which jurisdiction applies. They query the catalog repeatedly until they reach consensus on the correct rate.

Resolve withholding conflicts automatically

Delegating `check_withholding_status` to a tax agent determines if the buyer needs to retain the ISS. The agent checks federal exceptions against local municipal decrees. A procurement agent might argue against withholding to speed up vendor payment. The tax agent uses the hard API response to override them and enforce legal compliance.

Setup guide

Set up ISS Calculator MCP in AutoGen

Prerequisites

Python 3.10+ installed
autogen-ext[mcp] package
Active Vinkius subscription with a valid endpoint token

1

Install AutoGen with MCP
Run pip install "autogen-ext[mcp]" autogen-agentchat. The MCP extension includes mcp_server_tools for stateless tool access.
2

Fetch tools from the MCP
Call mcp_server_tools(SseServerParams(url=...)) with your Vinkius endpoint. Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com.
3

Run your agent
Pass the tools to AssistantAgent and call agent.run(). The agent invokes ISS Calculator tools and returns structured results.

agent.py

from autogen_ext.tools.mcp import SseServerParams, mcp_server_tools
from autogen_agentchat.agents import AssistantAgent
from autogen_ext.models.openai import OpenAIChatCompletionClient

server_params = SseServerParams(
    url="https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
)

tools = await mcp_server_tools(server_params)

agent = AssistantAgent(
    name="ISS Calculator_assistant",
    model_client=OpenAIChatCompletionClient(model="gpt-4o"),
    tools=tools,
)

result = await agent.run("List recent ISS Calculator data")
print(result.messages[-1].content)

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Prerequisites

Python 3.10+ installed
autogen-ext[mcp] + autogen-agentchat
Active Vinkius subscription with a valid endpoint token

1

Install dependencies
Same packages as above. McpWorkbench is ideal when your agent needs stateful sessions across multiple tool calls.
2

Use McpWorkbench as context manager
Wrap your agent in async with McpWorkbench(...) to maintain shared state and resources. The workbench manages the full MCP session lifecycle.
3

Run with workbench
Pass workbench=workbench to your agent. State is preserved across multiple tool calls within the same session.

agent.py

from autogen_ext.tools.mcp import McpWorkbench, SseServerParams
from autogen_agentchat.agents import AssistantAgent
from autogen_ext.models.openai import OpenAIChatCompletionClient

server_params = SseServerParams(
    url="https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
)

async with McpWorkbench(server_params) as workbench:
    agent = AssistantAgent(
        name="ISS Calculator_assistant",
        model_client=OpenAIChatCompletionClient(model="gpt-4o"),
        workbench=workbench,
    )

    result = await agent.run("List recent ISS Calculator data")
    print(result.messages[-1].content)

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Independent Platform Disclaimer: Vinkius is an independent platform and is not affiliated with, endorsed by, sponsored by, verified by, or otherwise authorized by ISS Calculator. All third-party trademarks, logos, and brand names are the property of their respective owners. Their use on this website is strictly for informational purposes to identify service compatibility and interoperability.

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Common questions about ISS Calculator MCP in AutoGen

Install the autogen-ext[mcp] package. Use mcp_server_tools with your StreamableHttpServerParams to pass the tools to your AssistantAgent.

Any agent equipped with the tool list can trigger a request. They share the results in the group chat to inform the collective decision.

The tools provide objective legal facts. Agents stop hallucinating tax laws and base their arguments on actual municipal rates and withholding mandates.

You must provide the basic LC 116/2003 service codes. The MCP handles the complex mapping of those codes to local city rules.

The system only sees service categories and transaction amounts. AutoGen keeps all sensitive vendor identities and contract terms strictly local to your environment.

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