How to Use the PIS/COFINS Tax Calculator MCP in Mastra AI

Build resilient, automated PIS/COFINS tax workflows that never fail using Mastra AI.

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MCP Servers — Included with Plan

Connect PIS/COFINS Tax Calculator MCP to Mastra AI

Create your Vinkius account to connect PIS/COFINS Tax Calculator to Mastra AI — we handle the hosting, security, and runtime updates so you don't have to. No server setup required.

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Setup PIS/COFINS Tax Calculator with Mastra AI

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Claude

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Automate Regime Selection

This MCP provides the core logic for your automated tax workflows. Start by building a process that pulls quarterly financials from your ERP, then feeds the gross revenue and deductible costs into `evaluate_regime_comparison`. Mastra’s engine ensures this job runs reliably. The tool returns the optimal tax regime. Your workflow can then create a ticket, send a Slack notification, or update a record in your accounting system. The entire analysis runs without any manual intervention.

Conditional Tax Filing Logic

Here's the kicker: you can build branching logic based on tax outputs. A single workflow can use `calculate_cumulative_tax` for one subsidiary and `calculate_non_cumulative_tax` for another, all based on the regime decision from the previous step. Set a rule that if the calculated tax liability exceeds a certain threshold, the workflow requires human approval before proceeding. Mastra handles the state, the retries, and the notifications, so your process is completely bulletproof.

Reliable Reporting with this Mastra AI MCP Server

Bottom line, tax calculations have to be correct and they have to run on time. This MCP server handles the complex Brazilian tax rules so you don't have to. Your job is to define the workflow. Connect Mastra AI to this MCP once. From there, you can build any number of financial automation jobs that run on a schedule or trigger from an event. It's how you move tax compliance from a manual checklist to a fully automated system.

Setup guide

Set up PIS/COFINS Tax Calculator 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 PIS/COFINS Tax Calculator 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: "piscofins-tax-calculator-mcp-client",
  servers: {
    "piscofins-tax-calculator-mcp": {
      url: new URL(
        "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
      ),
    },
  },
});

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

const result = await agent.generate(
  "List recent PIS/COFINS Tax Calculator 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 PIS/COFINS 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 PIS/COFINS Tax Calculator MCP in Mastra AI

You instantiate the MCPClient in your Mastra AI code with this MCP's URL. Then, you can call its tools directly within your workflow steps to perform tax calculations as part of a larger automated process.

Mastra AI's workflow engine handles this. You can configure automatic retries with exponential backoff for the step that fetches data. The call to the PIS/COFINS Tax Calculator will only happen after the data is successfully retrieved.

Absolutely. A typical workflow would be: Step 1, get financial data. Step 2, call the `evaluate_regime_comparison` tool. Step 3, use conditional logic to send a Slack or email notification with the result.

The cumulative tool calculates tax as a straight percentage of gross revenue. The non-cumulative tool has a higher rate but allows you to deduct credits from certain purchases and expenses, often resulting in a lower net tax.

Your data is only used for the immediate calculation. Financial inputs, such as revenue figures and cost data, are processed ephemerally by the MCP server and are not stored. The connection between your Mastra AI agent and the MCP is secure.

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