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 Google ADK 16 tools — connect in under 2 minutes

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

google.github.io/adk-docs/tools/mcp-tools

Built by Vinkius GDPR 16 Tools SDK

Google Agent Development Kit (ADK) is Google's framework for building production AI agents. Add InvoiceXpress (Online Invoicing) as an MCP tool provider through Vinkius and your ADK agents can call every tool with full schema introspection.

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Vinkius supports streamable HTTP and SSE.

python

from google.adk.agents import Agent
from google.adk.tools.mcp_tool import McpToolset
from google.adk.tools.mcp_tool.mcp_session_manager import (
    StreamableHTTPConnectionParams,
)

# Your Vinkius token. get it at cloud.vinkius.com
mcp_tools = McpToolset(
    connection_params=StreamableHTTPConnectionParams(
        url="https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp",
    )
)

agent = Agent(
    model="gemini-2.5-pro",
    name="invoicexpress_online_invoicing_agent",
    instruction=(
        "You help users interact with InvoiceXpress (Online Invoicing) "
        "using 16 available tools."
    ),
    tools=[mcp_tools],
)

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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.

Google ADK natively supports InvoiceXpress (Online Invoicing) as an MCP tool provider. declare Vinkius Edge URL and the framework handles discovery, validation, and execution automatically. Combine 16 tools with Gemini's long-context reasoning for complex multi-tool workflows, with production-ready session management and evaluation built in.

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 Google ADK 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 Google ADK via MCP

Follow these steps to integrate the InvoiceXpress (Online Invoicing) MCP Server with Google ADK.

Install Google ADK

Run pip install google-adk

Replace the token

Replace [YOUR_TOKEN_HERE] with your Vinkius token

Create the agent

Save the code above and integrate into your ADK workflow

Explore tools

The agent will discover 16 tools from InvoiceXpress (Online Invoicing) via MCP

Why Use Google ADK with the InvoiceXpress (Online Invoicing) MCP Server

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

Google ADK natively supports MCP tool servers. declare a tool provider and the framework handles discovery, validation, and execution

Built on Gemini models, ADK provides long-context reasoning ideal for complex multi-tool workflows with InvoiceXpress (Online Invoicing)

Production-ready features like session management, evaluation, and deployment come built-in. not bolted on

Seamless integration with Google Cloud services means you can combine InvoiceXpress (Online Invoicing) tools with BigQuery, Vertex AI, and Cloud Functions

InvoiceXpress (Online Invoicing) + Google ADK Use Cases

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

Enterprise data agents: ADK agents query InvoiceXpress (Online Invoicing) and cross-reference results with internal databases for comprehensive analysis

Multi-modal workflows: combine InvoiceXpress (Online Invoicing) tool responses with Gemini's vision and language capabilities in a single agent

Automated compliance checks: schedule ADK agents to query InvoiceXpress (Online Invoicing) regularly and flag policy violations or configuration drift

Internal tool platforms: build self-service agent platforms where teams connect their own MCP servers including InvoiceXpress (Online Invoicing)

InvoiceXpress (Online Invoicing) MCP Tools for Google ADK (16)

These 16 tools become available when you connect InvoiceXpress (Online Invoicing) to Google ADK 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 Google ADK

Ready-to-use prompts you can give your Google ADK 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 Google ADK

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

McpToolset not found

Update: pip install --upgrade google-adk

InvoiceXpress (Online Invoicing) + Google ADK FAQ

Common questions about integrating InvoiceXpress (Online Invoicing) MCP Server with Google ADK.

How does Google ADK connect to MCP servers?

Import the MCP toolset class and pass the server URL. ADK discovers and registers all tools automatically, making them available to your agent's tool-use loop.

Can ADK agents use multiple MCP servers?

Yes. Declare multiple MCP tool providers in your agent configuration. ADK merges all tool schemas and the agent can call tools from any server in a single turn.

Which Gemini models work best with MCP tools?

Gemini 2.0 Flash and Pro models both support function calling required for MCP tools. Flash is recommended for latency-sensitive use cases, Pro for complex reasoning.