Can my AI automatically issue an NFS-e for a specific customer?

Yes! Use the `issue_service_invoice` tool with the Company ID and a JSON payload containing the customer data and service values. Your agent will trigger the issuance process with the relevant municipality.

How do I find the correct IBGE code for a Brazilian city?

You can use the `list_cities` tool to search for municipalities by name or state. The agent will return the official IBGE codes required for fiscal document validation.

Can I retrieve the download link for an invoice PDF?

Yes! Use the `get_service_invoice` tool with the unique Invoice ID. Your agent will return the metadata, including official links to download the PDF and XML versions of the document.

NFe.io MCP Server for OpenAI Agents SDK 10 tools — connect in under 2 minutes

Name: NFe.io
Availability: InStock
Author: Vinkius

openai.github.io/openai-agents-python/mcp

Built by Vinkius GDPR 10 Tools SDK

The OpenAI Agents SDK enables production-grade agent workflows in Python. Connect NFe.io through the Vinkius and your agents gain typed, auto-discovered tools with built-in guardrails — no manual schema definitions required.

Get MCP Server for AI Agents

ASK AI ABOUT THIS MCP SERVER

Open in ChatGPT Open in Claude Open in Perplexity

Vinkius supports streamable HTTP and SSE.

python

import asyncio
from agents import Agent, Runner
from agents.mcp import MCPServerStreamableHttp

async def main():
    # Your Vinkius token — get it at cloud.vinkius.com
    async with MCPServerStreamableHttp(
        url="https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    ) as mcp_server:

        agent = Agent(
            name="NFe.io Assistant",
            instructions=(
                "You help users interact with NFe.io. "
                "You have access to 10 tools."
            ),
            mcp_servers=[mcp_server],
        )

        result = await Runner.run(
            agent, "List all available tools from NFe.io"
        )
        print(result.final_output)

asyncio.run(main())

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Stream every event to Splunk, Datadog, or your own webhook in real-time

* Every MCP server runs on Vinkius-managed infrastructure inside AWS - a purpose-built runtime with per-request V8 isolates, Ed25519 signed audit chains, and sub-40ms cold starts optimized for native MCP execution. See our infrastructure

About NFe.io MCP Server

Connect your AI agents to NFe.io, the leading Brazilian platform for fiscal document automation. This MCP provides 10 tools to manage the full lifecycle of Service Invoices (NFS-e), validate Brazilian municipal codes (IBGE), and monitor corporate metadata for companies integrated into your billing environment.

The OpenAI Agents SDK auto-discovers all 10 tools from NFe.io through native MCP integration. Build agents with built-in guardrails, tracing, and handoff patterns — chain multiple agents where one queries NFe.io, another analyzes results, and a third generates reports, all orchestrated through the Vinkius.

What you can do

Invoice Orchestration — Issue, cancel, and retrieve Service Invoices (NFS-e) for multiple cities across Brazil
Company Management — List and inspect registered companies and their current fiscal configurations
Service Definition — Manage service codes and tax metadata to ensure accurate fiscal reporting
Fiscal Intelligence — Retrieve detailed city capabilities and validate IBGE codes for seamless municipal integration
PDF Retrieval — Generate and retrieve download links for official invoice PDF and XML documents programmatically

The NFe.io MCP Server exposes 10 tools through the Vinkius. Connect it to OpenAI Agents SDK in under two minutes — no API keys to rotate, no infrastructure to provision, no vendor lock-in. Your configuration, your data, your control.

How to Connect NFe.io to OpenAI Agents SDK via MCP

Follow these steps to integrate the NFe.io MCP Server with OpenAI Agents SDK.

Install the SDK

Run pip install openai-agents in your Python environment

Replace the token

Replace [YOUR_TOKEN_HERE] with your Vinkius token from cloud.vinkius.com

Run the script

Save the code above and run it: python agent.py

Explore tools

The agent will automatically discover 10 tools from NFe.io

Why Use OpenAI Agents SDK with the NFe.io MCP Server

OpenAI Agents SDK provides unique advantages when paired with NFe.io through the Model Context Protocol.

Native MCP integration via `MCPServerSse` — pass the URL and the SDK auto-discovers all tools with full type safety

Built-in guardrails, tracing, and handoff patterns let you build production-grade agents without reinventing safety infrastructure

Lightweight and composable: chain multiple agents and MCP servers in a single pipeline with minimal boilerplate

First-party OpenAI support ensures optimal compatibility with GPT models for tool calling and structured output

NFe.io + OpenAI Agents SDK Use Cases

Practical scenarios where OpenAI Agents SDK combined with the NFe.io MCP Server delivers measurable value.

Automated workflows: build agents that query NFe.io, process the data, and trigger follow-up actions autonomously

Multi-agent orchestration: create specialist agents — one queries NFe.io, another analyzes results, a third generates reports

Data enrichment pipelines: stream data through NFe.io tools and transform it with OpenAI models in a single async loop

Customer support bots: agents query NFe.io to resolve tickets, look up records, and update statuses without human intervention

NFe.io MCP Tools for OpenAI Agents SDK (10)

These 10 tools become available when you connect NFe.io to OpenAI Agents SDK via MCP:

cancel_merchandise_invoice

Cancel an issued Merchandise Invoice (NF-e)

cancel_service_invoice

Cancel an issued Service Invoice (NFS-e)

create_company

get_company_details

Get detailed info for a specific company issuer

get_merchandise_invoice

Retrieve details for a specific Merchandise Invoice (NF-e)

get_service_invoice

Retrieve details for a specific Service Invoice (NFS-e)

issue_merchandise_invoice

Issue a Merchandise Invoice (NF-e)

issue_service_invoice

Issue a Service Invoice (NFS-e)

list_companies

List all companies (issuers) registered in your NFe.io account

list_webhooks

List all configured webhooks in NFe.io

Example Prompts for NFe.io in OpenAI Agents SDK

Ready-to-use prompts you can give your OpenAI Agents SDK agent to start working with NFe.io immediately.

"List all active companies in my NFe.io account."

"Check the status of service invoice ID 'inv_nfe_999888'."

"Find the IBGE code for the city of 'São Paulo'."

Troubleshooting NFe.io MCP Server with OpenAI Agents SDK

Common issues when connecting NFe.io to OpenAI Agents SDK through the Vinkius, and how to resolve them.

MCPServerStreamableHttp not found

Ensure you have the latest version: pip install --upgrade openai-agents

Agent not calling tools

Make sure your prompt explicitly references the task the tools can help with.

NFe.io + OpenAI Agents SDK FAQ

Common questions about integrating NFe.io MCP Server with OpenAI Agents SDK.

How does the OpenAI Agents SDK connect to MCP?

Use MCPServerSse(url=...) to create a server connection. The SDK auto-discovers all tools and makes them available to your agent with full type information.