Connect Cadus to Claude and ChatGPT

• A Cadus account. Accounts are created in the Cadus app.
• For invoices, Invoicing & Estimates turned on in Cadus Settings, and a client saved in Cadus. To send an invoice, the client needs an email address.
• For jobs, Schedule turned on in Cadus Settings. A job doesn't need a client.

The address to add is:

https://www.cadus.app/mcp

On the Cadus page, sign in with your email link or password, choose what the app can do, and choose Allow. You'll go straight back to the app. To change this later, disconnect the app and connect it again. That's also how an older connection gets new features.

• See your clients and invoices
• Create draft invoices
• Email saved invoices to the address saved for the client
• See your scheduled jobs
• Add jobs to your schedule
• Change your scheduled jobs
• Delete your scheduled jobs

Seeing your clients and invoices is always part of a connection, even if you only use it for jobs. You can turn the rest off when you approve it.

What it can't do

• It can't change your password, move money, or see your connected bank accounts, expenses, or taxes.
• It can only email the address saved for the client. To send somewhere else, change the client's email in Cadus.
• It works with invoices, not estimates.
• It can't see or change a job's work notes or invoice link, and deleting a job never deletes an invoice.
• One connection can start 25 invoice emails in 24 hours.

• Which of my invoices are overdue, and how much is owed on each?
• Find my client Avery Hill and draft an invoice for 2.5 hours of design at $120 an hour, due December 1.
• Email my latest draft invoice to the client with a short thank-you note.
• What jobs do I have this week?
• Add a job for Avery Hill next Tuesday at 9am for two hours. I need to bring a ladder.
• Move my Tuesday job for Avery Hill to Thursday at the same time.
• Delete the job I added for Avery Hill on Thursday.

When you connect, you choose on a Cadus page what the app can do. Cadus enforces that choice on every request, so the app can't use a permission you left off.

Whether the app also stops to ask before each action is the app's decision, not Cadus's. Cadus labels every action that changes your data so Claude knows to ask first, but settings in Claude can allow an action without asking, and ChatGPT follows its own rules. Check how your app behaves before relying on it.

The app prepares a preview first, which sends nothing. To send, it has to repeat the recipient, total, and any note from that preview. Cadus refuses the send if they don't match or the invoice has changed, so a prompt from your app can show what will actually go out. If the invoice was already sent, the preview says so and sending another copy has to be requested. Repeating a send doesn't email your client twice.

Job dates and times use the time zone saved in your Cadus profile, and each reply names it. If you tick a job permission and your device keeps a different US time, the Cadus page offers to switch your saved zone, ticked by default. Switching also changes which day Cadus counts as today.

A new job has to start in the future and within the next year, and a time that daylight saving skips or repeats is refused. To change or delete a job, the app has to name it as it is now, so a mix-up or an out-of-date view is refused. A moved job keeps its length unless the app changes that too.

Deleting a job is permanent. It doesn't delete a linked invoice; to delete both, use the Cadus app. Jobs an app adds or changes act like any others in Cadus, including job notifications on your phone.

A connected app receives what it asks for within the permissions you approve. That can include client names, companies, and email and street addresses; invoice lines, totals, notes, terms, and payment instructions; your business name; and job titles, times, clients, locations, planned work, and equipment. A job's location is often a client's address.

The app's provider handles this under its own terms, which also cover what it keeps after you disconnect. Cadus doesn't receive your conversation, only what the app sends to carry out your request. Read the Privacy Policy for details, including what Cadus keeps.

In the Cadus web workspace, open Settings, find Connected apps, and choose Disconnect. The app loses access on its next request. You can also remove the connector in the app itself, then check Connected apps to confirm it's gone.

Still stuck? Email support@cadus.app with the exact message you saw.