MCP connector for Claude

InvoiceXpress

Read invoices, credit notes, clients, items and receivables from an InvoiceXpress account: list and filter documents, see what is unpaid or overdue per client, and total sales by month and client. Read-only; nothing is issued, changed or sent.

Add it to Claude

1. Create an account and add credits at https://openjack.dev; copy your connection key.
2. In Claude, open Settings → Connectors → Add custom connector and paste https://invoicexpress.openjack.dev/mcp.
3. Click Connect. You will be asked for the connection key and your InvoiceXpress credentials.

How your data is handled

Your InvoiceXpress credentials are validated once, then stored encrypted with a key that only the token issued to your Claude account can unwrap. Disconnecting the connector in Claude revokes that token. The connector keeps no logs and no cache, and stores none of the data it passes to Claude. Every tool is read-only.