Claude + Bill4Time: Connect Your Billing Data to Claude
Bill4Time doesn’t offer a Claude connector, and it hasn’t published an MCP server. It does let you create an API key in its settings in about a minute. Connect that key to Carly, add the Carly connector to Claude, and your time entries, invoices and payments are in the chat.
Where Bill4Time stands with Claude
As of October 16, 2026, there’s no Bill4Time connector in Claude and no official Bill4Time MCP server.
Bill4Time’s public API covers the data a billing partner actually asks about: clients, projects, time entries, expenses, invoices, payments, users, contacts and trust accounting. It’s read-only today, so new entries and invoices still get created in Bill4Time itself. For reporting and chasing money, reading is the part that matters.
How to connect Bill4Time to Claude through Carly
- Create an API key. In Bill4Time, open Settings and go to the API tab. Create a key. You can make more than one, so create one just for Carly.
- Connect Bill4Time in Carly. In Carly, go to Integrations → Connect an API and connect Bill4Time there.
- Add Carly to Claude. Click Get the Carly connector, then Connect, and sign in.
- Ask Claude about your billing. It answers through the Carly connector with live Bill4Time data.
What Claude can do with Bill4Time once Carly is in
- “Which clients have invoices more than 60 days past due, and how much does each one owe?”
- “How many hours did Michael Bennett bill on the Harper Logistics project last week?”
- “Total this month’s billable hours by attorney and compare it with September.”
- “What’s left in trust for the Whitaker estate, and what was the last payment applied?”
With your Gmail or Outlook connected in Carly too, Claude can match a client’s email to their open invoices in one step.
Where Claude stops
Claude answers when you ask. Its scheduled tasks run on a clock, and nothing in Bill4Time can start one. An invoice tipping past 30 days, a client asking what they owe, an attorney who forgot to log Friday’s hours: all of it waits for someone to open a chat.
Carly handles those, in the cloud, on a schedule you set or when an email comes in:
- Every Monday at 8, email each attorney the hours they logged last week, by project.
- On the 1st, list every invoice more than 30 days past due and draft a polite reminder to each client from your own Outlook or Gmail, ready for you to approve.
- When a client emails about their balance, look up their invoices and payments and draft the answer.
- Every Friday at 4, post the week’s billable hours by attorney to the firm’s Slack or Teams.
Carly connects to thousands of apps, so the same workflow can update QuickBooks, add a task in your practice management system, or put a collections call on your calendar. You set it up in plain English. Routine steps run as free Zapier-style workflows; work that needs judgment runs as an AI agent. Free Zapier-style workflows; AI agents from $35/month. Get started with Carly.
Claude alone vs Claude with Carly
| Claude alone | Claude + Carly | |
|---|---|---|
| Bill4Time in Claude | No connector | Through the Carly connector |
| Time, invoices, payments, trust | No | Yes |
| Setup | Nothing official to install | Create a key, connect Carly |
| Weekly hours to each attorney | No | Yes, every Monday |
| Past-due reminders | Only when you ask | Drafted on the 1st |
| Runs with your laptop closed | Scheduled tasks only | Yes, in the cloud |
| Price | Your Claude plan | Free Zapier-style workflows; AI agents from $35/month |
FAQ
Does Claude work with Bill4Time?
Not directly. Bill4Time has no Claude connector and no official MCP server. Connect Bill4Time to Carly with an API key, add the Carly connector to Claude, and Claude can work with your Bill4Time data.
Where do I get a Bill4Time API key?
Settings → API tab. Create a key there. You can create several and give each tool its own.
Can Claude create time entries in Bill4Time?
Not through Bill4Time’s API, which is read-only. Claude and Carly read every entry, invoice and payment; new time still gets entered in Bill4Time.
Can Carly chase overdue invoices for me?
Yes. On a schedule you set, Carly pulls past-due invoices from Bill4Time and drafts a reminder to each client from your own email, so nothing goes out until you approve it.
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