Use InvoiceCave in Claude Desktop
102 MCP tools, one config snippet, 30 seconds. Once connected, Claude can create invoices, record payments, send reminders, and run reports — all from a normal conversation.
Get your API key
Sign in to your InvoiceCave account and head to Settings → Security. Click Generate API Key, name it "Claude Desktop", and copy the ic_… value. You won't be able to see it again — paste it somewhere safe.
Open Claude Desktop config
In Claude Desktop, open Settings → Developer → Edit Config. The file lives at:
- macOS:
~/Library/Application Support/Claude/claude_desktop_config.json - Windows:
%APPDATA%\Claude\claude_desktop_config.json
Add InvoiceCave to mcpServers
Paste this into the mcpServers object (replace ic_your_api_key with your real key):
{
"mcpServers": {
"invoicecave": {
"url": "https://www.invoicecave.com/api/mcp/mcp",
"headers": {
"Authorization": "Bearer ic_your_api_key"
}
}
}
}"invoicecave": {...} entry inside the existing "mcpServers" object — don't replace the file.Restart and test
Quit Claude Desktop completely (Cmd+Q on Mac, right-click tray icon → Quit on Windows). Re-launch.
Click the 🔌 plug icon next to the message input — you should see invoicecave listed with all 102 tools available.
Try a prompt:
Prompts to try first
Type any of these into Claude and watch it execute via the 102-tool MCP layer.
“Create a $5,000 invoice for Acme Corp using the modern template, due Net 30, and email it.”
“Set up a $2,500/month retainer for Globex starting January 1.”
“Show me my profit and loss for Q4, broken down by currency.”
“Send overdue reminders to every customer with balance > 30 days late.”
“Convert the latest quote for Initech into a Draft invoice.”
“Apply the configured late fee to every invoice past 45 days due.”
Want to try it without Claude Desktop?
Same 102 tools work in Claude Code (CLI) and Cursor.