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JustInvoice MCP server

Create and manage invoices with JustInvoice API

JustInvoice is not a separate install. One Activepieces MCP server exposes it alongside 760+ other apps, behind a single URL.

Start building See the JustInvoice integration
Tools
6
Works with
Any MCP client
Auth
API key
License
MIT, open source
Updated
August 2026

About the JustInvoice MCP server

Connect JustInvoice once in Activepieces and every action it ships becomes a tool your assistant can call, behind the same server URL as the rest of your apps. Your agent reaches JustInvoice and 760+ other apps over a single connection, on our cloud or a self-hosted install.

Tools

JustInvoice tools your AI can run

Once connected, your assistant can call any of these JustInvoice actions by asking in plain language.

  • Create Invoice

    Creates a new invoice in JustInvoice

    14 fields

  • Get Invoice

    Gets detailed information about a specific invoice

    1 field

  • Mark Invoice Final

    Marks an invoice currently in draft as final and ready to accept payment

    1 field

  • Mark Invoice Cancelled

    Marks an invoice currently in final as cancelled

    1 field

  • Mark Invoice Paid

    Marks an existing final invoice as paid

    1 field

  • Delete Invoice

    Permanently deletes an invoice

    1 field

JustInvoice MCP, answered.

No. That is the point of it. One Activepieces server exposes JustInvoice alongside every other piece you connect, so your client keeps a single connection.

Yes. Activepieces is open source and free to start, and the MCP server is included on every plan, from the free cloud tier to any self-hosted deployment.

Connect JustInvoice in Activepieces, enable the server under Settings → MCP Server, then paste your server URL into your client config. It authenticates over OAuth on first use.

It can call 6 tools, including Create Invoice, Get Invoice, Mark Invoice Final, and chain them with steps in other apps inside the same run.

Connections use OAuth2 with limited scopes and are stored under 256-bit encryption, with no API to read them back, so an agent gets scoped access rather than your keys.