Self-hosted, MCP-native invoicing. Clients, invoices, estimates, time, expenses and Stripe payments, with a built-in MCP server so Claude Code, Codex, Cursor and other agents can do the billing work w
Invoicing for your business and the agents that work for it.
Billr is the billing workspace you run for your own business: clients, invoices, estimates, engagements, time, expenses, payments and reports. It is also an MCP server, so a coding agent can do the same work with a scoped key you can revoke, and every document it touches stays in an application a person can open.
Prefer not to run it yourself? billr.cc is the hosted version of Billr.
Billr is self-hosted invoicing built for working with agents. You run it on your own computer or server, you and your agents bill your clients from it, and the only outside people who ever see it are those clients, on the invoice and estimate pages Billr sends them.
- One owner. The first person to sign up owns the installation, and sign-up closes behind them. - Your Stripe account. Card payments go straight to the Stripe account whose keys you put in the environment. Nothing sits in the middle and nothing is added on top of Stripe's fee. - Your database. Everything lives in a Supabase project you control: on your laptop, on your own server, or managed. - Your agents. Claude Code, Codex, Cursor and any MCP client connect by URL to /api/mcp on your installation.
You need Node.js 22 or newer, Docker (running) and the Supabase CLI 2.67.1 or newer.
Open http://localhost:3000 and sign up: that account owns this Billr. Create a business, add a client, create an invoice and download its PDF.
From the project README.
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