Can I see the signed PDF of an invoice through my agent?

Yes. Use the `get_invoice` tool with a specific Invoice ID. Your agent will return all document details along with a permalink to the signed PDF, allowing you to view or share the official fiscal document instantly.

How do I find a client by their company name?

The `find_client` tool allows you to search for a client directly by their business name. This is perfect for locating a client profile when you don't have their numerical ID handy.

Can I list the VAT rates available in my account?

Absolutely. Use the `list_taxes` tool to enumerate all VAT rates and exemptions configured in your InvoiceXpress account. Your agent will show the official AT mapping, which is essential before creating new items or invoices.

InvoiceXpress (Online Invoicing) MCP Server for Pydantic AI 16 tools — connect in under 2 minutes

Name: InvoiceXpress (Online Invoicing)
Availability: InStock
Author: Vinkius

ai.pydantic.dev/mcp

Built by Vinkius GDPR 16 Tools SDK

Pydantic AI brings type-safe agent development to Python with first-class MCP support. Connect InvoiceXpress (Online Invoicing) through Vinkius and every tool is automatically validated against Pydantic schemas. catch errors at build time, not in production.

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 pydantic_ai import Agent
from pydantic_ai.mcp import MCPServerHTTP

async def main():
    # Your Vinkius token. get it at cloud.vinkius.com
    server = MCPServerHTTP(url="https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp")

    agent = Agent(
        model="openai:gpt-4o",
        mcp_servers=[server],
        system_prompt=(
            "You are an assistant with access to InvoiceXpress (Online Invoicing) "
            "(16 tools)."
        ),
    )

    result = await agent.run(
        "What tools are available in InvoiceXpress (Online Invoicing)?"
    )
    print(result.data)

asyncio.run(main())

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* 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 InvoiceXpress (Online Invoicing) MCP Server

Connect your InvoiceXpress account to any AI agent and take full control of your certified invoicing and client management in Portugal through natural conversation.

Pydantic AI validates every InvoiceXpress (Online Invoicing) tool response against typed schemas, catching data inconsistencies at build time. Connect 16 tools through Vinkius and switch between OpenAI, Anthropic, or Gemini without changing your integration code. full type safety, structured output guarantees, and dependency injection for testable agents.

What you can do

Client Management — List all registered clients and retrieve detailed fiscal data including NIF/NIPC identifiers, addresses, and contact histories directly from your agent
Invoice Lifecycle — Browse issued invoices and receipts, and access detailed line items and tax breakdowns for each document securely
Estimate & Quotes — List and retrieve estimates and pro-forma invoices to monitor your sales pipeline and pending business proposals
Item Inventory — Manage your catalog of faturable articles and services, including unit prices and associated VAT rates (IVA)
Fiscal Compliance — Audit tax rates and exemptions active in your account to ensure mapping with official AT (Autoridade Tributária) tables
Digital Delivery — Access permalinks to signed PDF documents for easy sharing and visual verification of fiscal items

The InvoiceXpress (Online Invoicing) MCP Server exposes 16 tools through the Vinkius. Connect it to Pydantic AI 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 InvoiceXpress (Online Invoicing) to Pydantic AI via MCP

Follow these steps to integrate the InvoiceXpress (Online Invoicing) MCP Server with Pydantic AI.

Install Pydantic AI

Run pip install pydantic-ai

Replace the token

Replace [YOUR_TOKEN_HERE] with your Vinkius token

Run the agent

Save to agent.py and run: python agent.py

Explore tools

The agent discovers 16 tools from InvoiceXpress (Online Invoicing) with type-safe schemas

Why Use Pydantic AI with the InvoiceXpress (Online Invoicing) MCP Server

Pydantic AI provides unique advantages when paired with InvoiceXpress (Online Invoicing) through the Model Context Protocol.

Full type safety: every MCP tool response is validated against Pydantic models, catching data inconsistencies before they reach your application

Model-agnostic architecture. switch between OpenAI, Anthropic, or Gemini without changing your InvoiceXpress (Online Invoicing) integration code

Structured output guarantee: Pydantic AI ensures tool results conform to defined schemas, eliminating runtime type errors

Dependency injection system cleanly separates your InvoiceXpress (Online Invoicing) connection logic from agent behavior for testable, maintainable code

InvoiceXpress (Online Invoicing) + Pydantic AI Use Cases

Practical scenarios where Pydantic AI combined with the InvoiceXpress (Online Invoicing) MCP Server delivers measurable value.

Type-safe data pipelines: query InvoiceXpress (Online Invoicing) with guaranteed response schemas, feeding validated data into downstream processing

API orchestration: chain multiple InvoiceXpress (Online Invoicing) tool calls with Pydantic validation at each step to ensure data integrity end-to-end

Production monitoring: build validated alert agents that query InvoiceXpress (Online Invoicing) and output structured, schema-compliant notifications

Testing and QA: use Pydantic AI's dependency injection to mock InvoiceXpress (Online Invoicing) responses and write comprehensive agent tests

InvoiceXpress (Online Invoicing) MCP Tools for Pydantic AI (16)

These 16 tools become available when you connect InvoiceXpress (Online Invoicing) to Pydantic AI via MCP:

create_client

Se não for fornecido um NIF, usa o valor Consumer (ou similar requerido pelo portal). Registar um novo cliente no InvoiceXpress com dados fiscais completos

create_item

Precisas sempre de um ID de taxa legal (consulta a ferramenta list_taxes previamente). Criar um novo artigo ou serviço para ser faturado

find_client

Pesquisar um cliente pelo nome empresarial

get_client

Obter detalhes completos de um cliente pelo seu ID

get_invoice

Obter todos os detalhes e o link PDF de uma fatura

get_item

Obter detalhes de um artigo ou serviço pelo seu ID

list_clients

Listar todos os clientes registados no InvoiceXpress

list_credit_notes

Listar todas as notas de crédito (devolução / acerto)

list_estimates

Listar todos os orçamentos emitidos de forma paginada

list_guides

Listar guias de transporte

list_invoices

Listar todas as faturas emitidas

list_items

Listar todos os artigos e serviços configurados no InvoiceXpress

list_receipts

Listar todos os recibos de pagamento de clientes

list_sequences

Listar as séries de faturas ativas, ex: FT 2026/

list_taxes

Listar as taxas de IVA e isenções ativas na conta

update_client

Só os parâmetros enviados serão substituídos, os restantes mantêm-se inalterados. Atualizar os dados demográficos de um cliente existente

Example Prompts for InvoiceXpress (Online Invoicing) in Pydantic AI

Ready-to-use prompts you can give your Pydantic AI agent to start working with InvoiceXpress (Online Invoicing) immediately.

"List the last 5 invoices from InvoiceXpress"

"Search for a client named 'TechPorto'"

"What are the active VAT rates in my account?"

Troubleshooting InvoiceXpress (Online Invoicing) MCP Server with Pydantic AI

Common issues when connecting InvoiceXpress (Online Invoicing) to Pydantic AI through the Vinkius, and how to resolve them.

MCPServerHTTP not found

Update: pip install --upgrade pydantic-ai

InvoiceXpress (Online Invoicing) + Pydantic AI FAQ

Common questions about integrating InvoiceXpress (Online Invoicing) MCP Server with Pydantic AI.

How does Pydantic AI discover MCP tools?

Create an MCPServerHTTP instance with the server URL. Pydantic AI connects, discovers all tools, and generates typed Python interfaces automatically.

Does Pydantic AI validate MCP tool responses?

Yes. When you define result types as Pydantic models, every tool response is validated against the schema. Invalid data raises a clear error instead of silently corrupting your pipeline.

Can I switch LLM providers without changing MCP code?

Absolutely. Pydantic AI abstracts the model layer. your InvoiceXpress (Online Invoicing) MCP integration works identically with OpenAI, Anthropic, Google, or any supported provider.