WeFact MCP serverRead-only by default

Ask Claude or ChatGPT about your WeFact invoices.

A hosted MCP server for WeFact. Connect your WeFact account once and let your AI assistant look up customers, invoices, products and subscriptions. Read-only by default: you choose what it may change, down to a single action.

Connect WeFactSee what it can do

Works with Claude, ChatGPT, Cursor and any other remote MCP client.

Your key is encrypted and your data is never stored.Other tools

How it works

  1. Copy your WeFact API key. You'll find it in the settings of WeFact.
  2. Paste it into MCP Hosted. Stored encrypted. Your AI never sees it.
  3. Add the link to Claude. Sign in once and allow access. ChatGPT and Cursor work too.
  4. Just ask. Plain questions in, answers from WeFact out.

Things you can ask

Once WeFact is connected, ask in your own words. Copy a question to try it.

  • “Which invoices are still open, and how much is outstanding in total?”
  • “Show me everything we invoiced to Jansen BV this year.”
  • “Which customers have an active subscription?”
  • “What is the price of our hosting package?”

What your AI assistant can do in WeFact

Read-only by default. When you connect, tick what it may change, down to a single action.

Looks things up

6 tools
list_debtors
Find customers by name, company or debtor code.
get_debtor
Read one customer in full: contact details, address and payment terms.
list_invoices
List invoices with the amount paid and the amount still open.
get_invoice
Read one invoice in full, line by line.
list_products
Look up your products and their prices.
list_subscriptions
See which customers have a subscription and what it bills.

Makes changes

16 tools

Only runs when you allow it for a connection.

create_debtor
Add a customer with their contact details and address.
update_debtor
Change a customer's contact details, address or payment term.
create_invoice
Draft a concept invoice for a customer, line by line.
update_invoice
Change the date, payment term, description or discount of a concept invoice.
delete_invoice
Delete a concept invoice that was never sent.
send_invoice
Send an invoice to the customer by email or Peppol.
send_invoice_reminder
Send a payment reminder for an open invoice.
register_invoice_payment
Register a payment that covers part of an invoice.
mark_invoice_paid
Mark an invoice as paid.
mark_invoice_unpaid
Undo the payment of an invoice.
credit_invoice
Credit an invoice with a credit invoice for the full amount.
create_product
Add a product with its price and VAT code.
update_product
Change a product's name, price or VAT code.
create_subscription
Start a subscription that bills a customer every period.
update_subscription
Change the price, quantity or period of a subscription.
terminate_subscription
End a subscription on a date.

Missing a tool? Let us know

Your data stays secure.

The key to your software is encrypted and never shared with Claude or ChatGPT. You stay in control of which AI assistant gets access to your software.

Your key stays with us

We store your key encrypted and only use it to look up what you ask for. The answers go straight to your AI. We keep no copy and no AI model trains on them.

Your AI gets its own login

You give it permission once, like when you sign in to an app with Google. It never gets your password or your key.

Disconnect in one click

Click Disconnect and we delete your key straight away. From that moment on, your AI can no longer reach your software.

Up and running in three steps

Create an account, connect your tool and paste one URL into Claude, ChatGPT or Cursor. There's no code to write and nothing to install, and you only do it once per tool.

  1. Create an account

    Email code, Google or GitHub.

  2. Connect WeFact

    Paste the API key from WeFact.

  3. Add the URL to your AI client

    Paste this URL as a remote MCP server and sign in once.

Connect WeFact

Rather run it on your own machine?

WeFact also runs on your own machine, started with one npx command. Your API key and your data never pass through our servers.

Buy a license

Pay for the tools you connect.

Hosting, updates and every AI assistant are included. Start with one tool and add more whenever you want.

WeFact MCP serverRead-only by default

€9per month

Per connection · incl. VAT

Connect WeFact
  • We host the server and keep it up to date
  • Works in Claude, ChatGPT, Cursor and any other MCP client
  • Your key is encrypted and your data is never stored
  • Cancel whenever you want

Frequently asked questions

What MCP is, how your data is protected and what your AI can change.

Ask Claude, ChatGPT or another AI assistant about your WeFact administration in plain language: which invoices are still open, what a customer was invoiced this year, who has a subscription or what a product costs. No more clicking through reports. Allow changes, and it can do the routine work in WeFact for you too.

Only what you allow. Every connection is read-only until you tick what it may change: create and edit, send to customers, payments, or delete and cancel, or single actions within them. A WeFact API key cannot be limited, so our server enforces your choice: it refuses every change you did not allow before anything reaches WeFact.

Only your API key, encrypted with AES-256. Invoices and customer details are fetched live when your AI asks for them, passed straight on and never saved. We never share them with anyone, and no AI model trains on them. The key never appears in logs or in the answers your AI assistant receives.

Any client that supports remote MCP servers, such as Claude, ChatGPT and Cursor. You add one URL and sign in once.

No. This is an independent service that connects to the public WeFact API. It is not affiliated with or endorsed by WeFact.