How to Use the Focus NFe MCP in Mastra AI

Q: Can I download the signed XML files directly to my server?

Yes, use the downloadxml tool within your Mastra workflow. The agent retrieves the official XML payload and can write it directly to your cloud storage bucket.

Build resilient, self-healing Brazilian tax workflows with automatic retries using Mastra AI and Focus NFe.

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Connect Focus NFe MCP to Mastra AI

Create your Vinkius account to connect Focus NFe to Mastra AI 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 Mastra AI

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Resilient SEFAZ Submissions with Mastra AI

The `emit_nfe` tool registers product invoices with state tax authorities inside your Mastra AI automated workflows. If SEFAZ returns a transient 503 error, Mastra's built-in engine automatically retries the call with exponential backoff. This setup eliminates manual intervention when government web services experience brief hiccups. Your agent handles the entire lifecycle from initial payload validation to final storage confirmation.

Self-Healing Service Invoice Workflows

The `emit_nfse` tool triggers municipal service invoice creation across thousands of Brazilian cities. Mastra's conditional branching routes the execution path depending on whether the municipal prefeitura accepts the payload immediately. When a city's server rejects an entry, your agent can call `consult_document` to verify if the document was processed anyway. This prevents double-billing and keeps your ERP records aligned.

Managed Cancellations via the MCP Server

The `cancel_document` tool handles official invoice cancellation requests within your backend workflows. You can configure a workflow that triggers this tool automatically if an order is canceled in your CRM. The workflow waits for the official confirmation, then triggers `download_xml` to fetch the updated tax document. Your backend receives the canceled XML file to update your accounting records.

Setup guide

Set up Focus NFe MCP in Mastra AI

Prerequisites

Node.js 18+ and a TypeScript project
@mastra/mcp + @mastra/core packages
Active Vinkius subscription with a valid endpoint token

1

Install dependencies
Run npm install @mastra/mcp @mastra/core plus your preferred model provider (e.g. @ai-sdk/openai).
2

Configure the MCPClient
Create an MCPClient with your Vinkius endpoint as a URL object. Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com.
3

Discover and inject tools
Call mcpClient.listTools() and spread the result into your agent's tools object. All Focus NFe tools become native Mastra tools.
4

Run with any model
Swap openai("gpt-4o") for any AI SDK-compatible provider. Call agent.generate() and the agent routes tool calls through MCP automatically.

agent.ts

import { MCPClient } from "@mastra/mcp";
import { Agent } from "@mastra/core/agent";
import { openai } from "@ai-sdk/openai";

const mcpClient = new MCPClient({
  id: "focus-nfe-mcp-client",
  servers: {
    "focus-nfe-mcp": {
      url: new URL(
        "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
      ),
    },
  },
});

const agent = new Agent({
  name: "Focus NFe Agent",
  model: openai("gpt-4o"),
  instructions: "You have access to Focus NFe tools.",
  tools: {
    ...(await mcpClient.listTools()),
  },
});

const result = await agent.generate(
  "List recent Focus NFe transactions"
);
console.log(result.text);

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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 Mastra AI

Instantiate the MCPClient using your Vinkius HTTP endpoint. After that, pull the tools via mcpClient.listTools() and spread them directly into your Mastra agent definition.

Yes, you can configure Mastra's workflow engine to catch errors from emit_nfe or emit_nfse. It will retry the operation automatically based on your defined backoff strategy.

The server normalizes the payload requirements for different cities. Your Mastra workflows send a standard JSON structure, and the underlying API translates it to match the specific prefeitura rules.

Yes, use the download_xml tool within your Mastra workflow. The agent retrieves the official XML payload and can write it directly to your cloud storage bucket.

Your tax details, customer CPF/CNPJ numbers, and financial values are processed inside secure, isolated V8 instances. This ephemeral execution environment prevents cross-tenant data leaks and leaves no persistent footprint.

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