KosmoKrator

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Invoice Ninja MCP Integration for LangGraph

Connect Invoice Ninja to LangGraph through the local KosmoKrator MCP gateway with scoped tools, credentials, and write policy.

8 functions 6 read 2 write API token auth
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Connect Invoice Ninja to LangGraph

Run KosmoKrator integration calls from LangGraph nodes while preserving local credentials and permissions.

Use a graph node that calls the KosmoKrator CLI for deterministic steps or an MCP client for dynamic tool selection. The gateway is local, scoped to this integration, and starts with --write=deny so LangGraph can inspect read-capable tools without receiving write access by default.

Invoice Ninja MCP Config for LangGraph

Headless CLI calls fit repeatable graph edges; MCP fits exploratory agent nodes.

{
  "mcpServers": {
    "kosmokrator-invoiceninja": {
      "type": "stdio",
      "command": "kosmo",
      "args": [
        "mcp:serve",
        "--integration=invoiceninja",
        "--write=deny"
      ]
    }
  }
}

Run the Gateway Manually

kosmokrator mcp:serve --integration=invoiceninja --write=deny

Why Use KosmoKrator Here

Scoped tools

Expose only Invoice Ninja instead of a broad multi-service tool list.

Local credentials

Reuse credentials already configured for the KosmoKrator CLI and Lua runtime.

Write policy

Start read-only, then opt into ask or allow for trusted workspaces.

Invoice Ninja Tools Visible to LangGraph

LangGraph sees stable MCP tool names generated from the Invoice Ninja integration catalog.

MCP toolSource functionTypeDescription
integration__invoiceninja__invoiceninja_list_invoices invoiceninja.invoiceninja_list_invoices Read List invoices from Invoice Ninja. Supports filtering by client, status, and date range with pagination.
integration__invoiceninja__invoiceninja_get_invoice invoiceninja.invoiceninja_get_invoice Read Get a single invoice from Invoice Ninja by ID. Returns full invoice details including line items, client info, and payment status.
integration__invoiceninja__invoiceninja_create_invoice invoiceninja.invoiceninja_create_invoice Write Create a new invoice in Invoice Ninja. Requires a client_id and at least one line item. Supports custom due dates, partial deposits, and notes.
integration__invoiceninja__invoiceninja_list_clients invoiceninja.invoiceninja_list_clients Read List clients from Invoice Ninja. Supports filtering by name, email, and ID number with pagination.
integration__invoiceninja__invoiceninja_create_client invoiceninja.invoiceninja_create_client Write Create a new client in Invoice Ninja. Provide name and at least one contact with an email address.
integration__invoiceninja__invoiceninja_list_products invoiceninja.invoiceninja_list_products Read List products from Invoice Ninja. Supports filtering by product key, custom value, and text search with pagination.
integration__invoiceninja__invoiceninja_list_payments invoiceninja.invoiceninja_list_payments Read List payments from Invoice Ninja. Supports filtering by client, invoice, status, and date range with pagination.
integration__invoiceninja__invoiceninja_get_current_user invoiceninja.invoiceninja_get_current_user Read Get the profile of the currently authenticated Invoice Ninja user. Useful for verifying connection details and account information.

Related Invoice Ninja Pages

Invoice Ninja CLIUse direct JSON commands instead of MCP discovery. Invoice Ninja MCPFull gateway reference and MCP tool names. KosmoKrator for LangGraphClient-level gateway setup.