Fastbill

Verified Integration

Author: @simply•Category: ServerApplication

GitHub Repository

JSON-RPC 2.0

Protocol Standard

Sub-second

Execution Latency

Active

Operational Status

Client Configuration

— Connect Fastbill to Claude Desktop or Cursor in seconds

{
  "mcpServers": {
    "fastbill": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-fastbill"
      ],
      "env": {}
    }
  }
}

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows).

Architecture & Capabilities

System Overview

Integrates the Fastbill API into the Claude Desktop App, enabling AI-driven management of invoices, estimates, customers, and time tracking.

Indexed Date

7/22/2026

License

Open Source

Protocol Layer

stdio / SSE RPC

Frequently Asked Questions

Architecture and operational details for Fastbill

The Fastbill integration connects your Fastbill account directly with the Claude Desktop App, allowing you to manage your Fastbill operations like invoices, customers, quotes, and time tracking using AI-driven commands.

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