How to Use the Focus NFe MCP in Google ADK

Q: Can I restrict which Focus NFe tools are exposed to my Google ADK agent?

Yes, you can use the toolnames filter when initializing the toolset. If you only want your agent to check statuses, you can expose consultdocument and hide the emission tools.

Connect Google ADK enterprise agents directly to the Focus NFe billing engine.

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Connect Focus NFe MCP to Google ADK

Create your Vinkius account to connect Focus NFe to Google ADK 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 Focus NFe with Google ADK

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Run enterprise tax workflows via Google ADK

The `emit_nfe` and `emit_nfse` tools connect your Gemini-powered enterprise agents to Brazilian tax authorities. This MCP Server lets your agents execute these tools to issue invoices directly from your existing Google Cloud infrastructure. Because Gemini handles long contexts, your agent can analyze massive ERP spreadsheets or BigQuery tables, extract transaction details, and map them to tax payloads. The agent then calls the emission tools to process thousands of invoices in sequence.

Track and download authorized tax XMLs

The `consult_document` tool keeps your cloud database updated by letting your agent track invoice status. When SEFAZ approves the document, the agent triggers `download_xml` to fetch the authorized file. The agent can write this raw XML data directly into Google Cloud Storage or update your BigQuery billing tables. This eliminates manual data entry and ensures your financial records match official government registries.

Automate cancellation requests directly from ERP data

The `cancel_document` tool voids the corresponding invoice when a sales order is flagged as canceled in your database. Your agent drafts the legal justification based on the order history and submits it to the tax authorities. This automation prevents costly accounting mismatches by ensuring cancelled orders are immediately voided in the government database, avoiding unnecessary tax liabilities.

Setup guide

Set up Focus NFe MCP in Google ADK

Prerequisites

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

1

Install Google ADK

Run pip install google-adk to install the Agent Development Kit. MCP support is included via the McpToolset class.
2

Connect via SSE transport

Use McpToolset.from_server() with SseServerParams pointing to your Vinkius endpoint. Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com.
3

Create an LlmAgent

Pass the returned mcp_tools list directly to LlmAgent(tools=mcp_tools). The ADK maps each MCP tool to a native Gemini function call — no manual schema definitions required.
4

Run with any Gemini model

The agent works with any Gemini model (gemini-2.0-flash, gemini-2.5-pro, etc.). Copy the full example on the right to get started with Focus NFe tools in your ADK agent.

agent.py

from google.adk.agents import LlmAgent
from google.adk.tools.mcp_tool.mcp_toolset import McpToolset
from google.adk.tools.mcp_tool.mcp_session_manager import SseServerParams

# Connect to the MCP via SSE
mcp_tools, exit_stack = await McpToolset.from_server(
    connection_params=SseServerParams(
        url="https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    )
)

# Create your agent with auto-discovered tools
agent = LlmAgent(
    name="Focus NFe_agent",
    model="gemini-2.0-flash",
    instruction="You have access to Focus NFe tools via MCP.",
    tools=mcp_tools,
)

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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 Focus NFe. 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 Focus NFe MCP in Google ADK

Use McpToolset with the server parameters pointing to your Vinkius HTTP endpoint. Pass this toolset to your LlmAgent instance, and the Gemini model will instantly gain access to tools like `emit_nfe` and `download_xml`.

Yes, you can use the tool_names filter when initializing the toolset. If you only want your agent to check statuses, you can expose `consult_document` and hide the emission tools.

Yes, the framework supports both. For cloud-deployed enterprise agents, the streamable HTTP transport for this MCP Server is the recommended approach to keep your agents connected without managing local processes.

The agent determines the invoice type based on the transaction metadata. It invokes `emit_nfe` for physical products and `emit_nfse` for services, automatically routing the data through the MCP Server to the correct state or municipal endpoints.

We encrypt every transaction in transit between your Google Cloud environment and the tax endpoints. Vinkius runs the server in zero-trust, ephemeral sandboxes, meaning your sensitive financial figures and corporate identifiers are never cached or logged.

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