How do I connect my InvoiceXpress account?

You subscribe to the MCP on Vinkius and enter your Account Name and API Key. Once connected, you can use it in any compatible client.

Can I get PDF copies of my invoices?

Yes. You can ask your agent to get the details for a specific invoice, and it will provide a link to the signed PDF.

Does this work with Portuguese tax laws?

Yes. The MCP is specifically designed for InvoiceXpress users in Portugal to manage certified invoicing and VAT compliance.

Can I create new clients through my AI client?

Yes. You can use the create_client capability to register new clients with their fiscal data.

What happens if I don't provide a NIF for a new client?

The capability will default to a Consumer profile to ensure the registration meets the requirements of the portal.

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

Yes. Use the get_invoice capability 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 capability 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 capability 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.

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Connect Invoicexpress Online Invoicing to ChatGPT and Claude

Set it up once and it works in ChatGPT, Claude, Cursor, and any other client you love. It all runs safely in the background, so you can relax and focus on what really matters. Run your entire billing cycle through a chat interface.

Ask AI about this Connector

Developed, maintained, and hosted by Vinkius.

MCP VERIFIED · PRODUCTION READY · VINKIUS GUARANTEED

Waiting for input…

Works with modern AI clients that support MCP, including ChatGPT, Claude, Cursor, and more.

Your AI does the work. We keep it safe and sound.

No other AI tool gives you this. Your workflow runs in the client you already love, your account stays protected, and you decide what the agent can and cannot do. It is the whole reason to make the switch.

Each Connector lives inside our infrastructure, the same place where your workflow runs. The three things below are already part of it, working quietly in the background so you never have to think about them. Nothing to add, nothing to set up, nothing to worry about.

V8 Isolate01

Each Connector runs inside its own sealed environment.

Each Connector runs inside its own sealed V8 runtime — no access to your files, your system, or other servers. A Connector never sees past its own request.

Kill Switch02

One switch stops every agent. Instantly.

One action deactivates every Connector, revokes every token, and ends every session at once. AI Governance keeps the record.

FinOps per User03

Spending limits that pause instead of surprise.

Every user keeps their own connections and credentials, isolated from everyone else. Anything that would cross your spending limit is held for your approval, not billed.

Three controls, built into the layer your AI connects through.

Curated set · 16 capabilities

We ship only the actions that matter.

Capability set01 / 04

01-04

4 capabilities in this set.

Part of 16 available through InvoiceXpress.

01
Create item
This capability adds a new product or service to your catalog. You'll need to provide a valid tax ID from your tax list.
02
List clients
This capability returns a list of all clients currently registered in your InvoiceXpress account.
03
List credit notes
This capability retrieves all credit notes used for returns or adjustments.
04
List estimates
Use this to see a paginated list of all issued estimates and quotes.

Capability set02 / 04

05-08

4 capabilities in this set.

Part of 16 available through InvoiceXpress.

05
List receipts
This capability lists all payment receipts issued to your clients.
06
List sequences
This capability shows your active invoice numbering series, such as FT 2026/.
07
List items
This capability pulls your full catalog of billable articles and services.
08
Find client
This capability searches for a specific client using their business name.

Capability set03 / 04

09-12

4 capabilities in this set.

Part of 16 available through InvoiceXpress.

09
Get client
Use this to retrieve complete profile and fiscal data for a client by their ID.
10
Create client
This capability registers a new client with full fiscal details. It defaults to a consumer profile if no NIF is provided.
11
List guides
This capability retrieves your list of transport guides.
12
List taxes
Use this to see all active VAT rates and exemptions configured in your account.

Capability set04 / 04

13-16

4 capabilities in this set.

Part of 16 available through InvoiceXpress.

13
List invoices
This capability returns a list of all invoices you have issued.
14
Update client
Use this to change existing client information. Only the specific fields you provide will be updated.
15
Get item
Use this to get the specific details of a single item or service from your catalog.
16
Get invoice
Use this to pull full details and a direct PDF link for a specific invoice.

Real work

What teams actually run

Quick Client Lookup

Find a client's NIF and address instantly to verify details for a new contract.

Invoice Retrieval

Get a direct link to a signed PDF invoice to email a customer immediately.

Tax Verification

Confirm that the correct VAT rate is assigned to a specific service in your catalog.

Pipeline Review

Check how many estimates are currently pending to gauge upcoming revenue.

Automate a task

Put InvoiceXpress to work on one thing.

Step-by-step automations your AI runs through this Connector: the workflow, the prompts to start with, and the exact capabilities behind each move.

One connector, every AI

InvoiceXpress works with the most popular AI clients.

These are the most popular clients, each with a step-by-step guide: one link, set up once, with governance and visibility built in. And because everything runs on the MCP standard, the same connection also works in any other compatible client — nothing to rebuild.

Building your own app? The connector is yours to use.

You don't need a client to put InvoiceXpress to work: the same hosted connection plugs into your own applications and agent code, with the same governance on every request. Build with it, chat with it — one connection for both.

Observed, not estimated

983ms average. Fast in production.

InvoiceXpress is checked daily against the live service.

Daily averagePeak 1091ms

Oct 3Today

Fastest day: 832ms
Slowest day: 1091ms
14-day trend: Improving-6%

Connect your client

One URL. Every client.

Activate the Connector, copy your link, and paste it into the client you already use. 16 capabilities arrive ready to run.

Preview access · not provider authentication

The vk_preview_* token belongs to Vinkius preview infrastructure. It lets Claude discover and display the capabilities of InvoiceXpress, so you can see the experience inside your AI.

It does not authenticate your account with InvoiceXpress. Actions requiring credentials or live account data may not run until you activate the Connector and authorize the service.

InvoiceXpress Connector

You're all set. Choose your MCP client and follow the setup instructions.

Connector linkhttps://edge.vinkius.com/vk_preview_Y79sWMz83EJs6EOkKf59gGsATmLtyafmTRpGhsg4/mcp

Claude Desktop

Follow the steps below to connect in seconds.

1In Claude Desktop, open Settings → Connectors.
2Click “Add custom connector” and paste the connector link above as the remote MCP server URL.
3Click Add and start a new chat — InvoiceXpress capabilities are ready to use.

Configuration · claude_desktop_config.jsonCopy

{
  "mcpServers": {
    "invoicexpress-online-invoicing-mcp": {
      "url": "https://edge.vinkius.com/vk_preview_Y79sWMz83EJs6EOkKf59gGsATmLtyafmTRpGhsg4/mcp"
    }
  }
}

Claude
ChatGPT
Cursor
VS Code
Windsurf
Claude Code
JetBrains
Cline

Step-by-step instructions for each client are in the guide. How to connect

Guided setup for Claude? Set up InvoiceXpress in Claude and other AIs

See all the AI clients this connector works with ↑

Who it's for

Built for the work InvoiceXpress owners hand off.

This MCP is designed for professionals operating under the Portuguese fiscal system who need to manage billing without switching between multiple apps.

01
Small Business Owners
They use the agent to check client balances and outstanding invoices.
02
Freelancers
They use the agent to grab invoice PDFs to send to clients while working in other capabilities.
03
Accounting Teams
They use the agent to audit VAT compliance and fiscal documents.

FAQ

Questions InvoiceXpress owners ask.

01
How do I connect my InvoiceXpress account?
You subscribe to the MCP on Vinkius and enter your Account Name and API Key. Once connected, you can use it in any compatible client.
02
Can I get PDF copies of my invoices?
Yes. You can ask your agent to get the details for a specific invoice, and it will provide a link to the signed PDF.
03
Does this work with Portuguese tax laws?
Yes. The MCP is specifically designed for InvoiceXpress users in Portugal to manage certified invoicing and VAT compliance.
04
Can I create new clients through my AI client?
Yes. You can use the create_client capability to register new clients with their fiscal data.
05
What happens if I don't provide a NIF for a new client?
The capability will default to a Consumer profile to ensure the registration meets the requirements of the portal.
06
Can I see the signed PDF of an invoice through my agent?
Yes. Use the get_invoice capability 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.
07
How do I find a client by their company name?
The find_client capability 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.
08
Can I list the VAT rates available in my account?
Absolutely. Use the list_taxes capability 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.

Explore

More in Finance Accounting

Connect InvoiceXpress to Claude, Cursor, ChatGPT & more

Your AI does the work. We keep it safe and sound.

Each Connector runs inside its own sealed environment.

One switch stops every agent. Instantly.

Spending limits that pause instead of surprise.

We ship only the actions that matter.

01-04

Create item

List clients

List credit notes

List estimates

05-08

List receipts

List sequences

List items

Find client

09-12

Get client

Create client

List guides

List taxes

13-16

List invoices

Update client

Get item

Get invoice

What teams actually run

Quick Client Lookup

Invoice Retrieval

Tax Verification

Pipeline Review

Building your own app? The connector is yours to use.

InvoiceXpress Connector

Claude Desktop

Small Business Owners

Freelancers

Accounting Teams

How do I connect my InvoiceXpress account?

Can I get PDF copies of my invoices?

Does this work with Portuguese tax laws?

Can I create new clients through my AI client?

What happens if I don't provide a NIF for a new client?

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

How do I find a client by their company name?

Can I list the VAT rates available in my account?

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