Bring Invoicing
to OpenAI Agents SDK
Create your Vinkius account to connect InvoiceXpress (Online Invoicing) to OpenAI Agents SDK and start using all 16 AI tools in minutes. Fully managed, enterprise secure, and ready to use without writing a single line of code. No hosting, no server setup — just connect and start using.
GDPR Free for SubscribersCompatible with every major AI agent and IDE
Gemini
What is the 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.
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
How it works
- Subscribe to this server
- Enter your InvoiceXpress Account Name and API Key
- Start managing your certified billing from Claude, Cursor, or any MCP-compatible client
Who is this for?
- Small Business Owners in Portugal — monitor outstanding invoices and manage client balances through natural conversation
- Freelancers & Service Providers — list and retrieve invoice PDFs for clients without leaving your development or design environment
- Accounting & Ops Teams — audit fiscal documents and ensure VAT compliance across the entire invoicing system
Built-in capabilities (16)
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
Precisas sempre de um ID de taxa legal (consulta a ferramenta list_taxes previamente). Criar um novo artigo ou serviço para ser faturado
Pesquisar um cliente pelo nome empresarial
Obter detalhes completos de um cliente pelo seu ID
Obter todos os detalhes e o link PDF de uma fatura
Obter detalhes de um artigo ou serviço pelo seu ID
Listar todos os clientes registados no InvoiceXpress
Listar todas as notas de crédito (devolução / acerto)
Listar todos os orçamentos emitidos de forma paginada
Listar guias de transporte
Listar todas as faturas emitidas
Listar todos os artigos e serviços configurados no InvoiceXpress
Listar todos os recibos de pagamento de clientes
Listar as séries de faturas ativas, ex: FT 2026/
Listar as taxas de IVA e isenções ativas na conta
Só os parâmetros enviados serão substituídos, os restantes mantêm-se inalterados. Atualizar os dados demográficos de um cliente existente
Why OpenAI Agents SDK?
The OpenAI Agents SDK auto-discovers all 16 tools from InvoiceXpress (Online Invoicing) through native MCP integration. Build agents with built-in guardrails, tracing, and handoff patterns. chain multiple agents where one queries InvoiceXpress (Online Invoicing), another analyzes results, and a third generates reports, all orchestrated through Vinkius.
- —
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
InvoiceXpress (Online Invoicing) in OpenAI Agents SDK
Why run InvoiceXpress (Online Invoicing) with Vinkius?
The InvoiceXpress (Online Invoicing) connection runs on our fully managed, secure cloud infrastructure. We handle the hosting, maintenance, and security so you don't have to deal with servers or code. All 16 tools are ready to work instantly without any complex setup.
You stay in complete control of your data. Your AI only accesses the information you approve, keeping your sensitive passwords and private details completely safe. Plus, with automatic optimizations, your AI works faster and more efficiently.
* Every connection is hosted and maintained by Vinkius. We handle the security, updates, and infrastructure so you don't have to write code or manage servers. See our infrastructure
Over 4,000 integrations ready for AI agents
Explore a vast library of pre-built integrations, optimized and ready to deploy.
Connect securely in under 30 seconds
Generate tokens to authenticate and link external services in a single step.
Complete visibility into every agent action
Audit live requests, latency, success rates, and active security compliance policies.
Optimize spending and track token ROI
Analyze real-time token consumption and cost metrics detailed by connection.
Explore our live AI Agents Analytics dashboard to see it all working
This dashboard is included when you connect InvoiceXpress (Online Invoicing) using Vinkius. You will never be left in the dark about what your AI agents are doing with your tools.
InvoiceXpress (Online Invoicing) and 4,000+ other AI tools. No hosting, no code, ready to use.
Professionals who connect InvoiceXpress (Online Invoicing) to OpenAI Agents SDK through Vinkius don't need to write code, manage servers, or worry about security. Everything is pre-configured, secure, and runs automatically in the background.
Raw MCP | Vinkius | |
|---|---|---|
| Ready-to-use MCPs | Find and configure each manually | 4,000+ MCPs ready to use |
| Connection Setup | Manual coding & server setup | 1-click instant connection |
| Server Hosting | You host it yourself (needs 24/7 uptime) | 100% hosted & managed by Vinkius |
| Security & Privacy | Stored in plaintext config files | Bank-grade encrypted vault |
| Activity Visibility | Blind execution (no logs or tracking) | Live dashboard with real-time logs |
| Cost Control | Runaway AI token spend risk | Automatic budget limits |
| Revoking Access | Must delete files or code to stop | 1-click disconnect button |
How Vinkius secures
InvoiceXpress (Online Invoicing) for OpenAI Agents SDK
Every request between OpenAI Agents SDK and InvoiceXpress (Online Invoicing) is protected by our secure gateway. We automatically keep your sensitive data private, prevent unauthorized access, and let you disconnect instantly at any time.
Frequently asked questions
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.
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.
Can I use multiple MCP servers in one agent?
Yes. Pass a list of MCPServerSse instances to the agent constructor. The agent can use tools from all connected servers within a single run.
Does the SDK support streaming responses?
Yes. The SDK supports SSE and Streamable HTTP transports, both of which work natively with Vinkius.
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.
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