Invapi E-Invoicing

MCP server for the Invapi E-Invoicing API — convert, validate, and extract invoices in UBL, CII, ZUGFeRD, Excel, and more.

Quick Start

npm install -g @invapi/mcp-server

Set your API key (get one at invapi.org):

export INVAPI_API_KEY=your-api-key

Usage

Claude Desktop

Add to claude_desktop_config.json:

{
  "mcpServers": {
    "invapi": {
      "command": "npx",
      "args": ["-y", "@invapi/mcp-server"],
      "env": {
        "INVAPI_API_KEY": "your-api-key"
      }
    }
  }
}

Claude Code

claude mcp add -e INVAPI_API_KEY=xxx invapi -- npx @invapi/mcp-server

Tools

Conversion

Tool	Description
invapi_convert_json_to_ubl	JSON Invoice → UBL XML
invapi_convert_json_to_cii	JSON Invoice → CII XML
invapi_convert_ubl_to_json	UBL XML → JSON Invoice
invapi_convert_cii_to_json	CII XML → JSON Invoice
invapi_convert_json_to_xlsx	JSON Invoices → Excel file
invapi_create_zugferd_pdf	PDF + JSON Invoice → ZUGFeRD PDF
invapi_convert_zugferd_to_json	ZUGFeRD PDF → JSON Invoice

Validation

Tool	Description
invapi_validate_ubl	Validate UBL XML against XRechnung 3.0.2 (EN 16931)
invapi_validate_cii	Validate CII XML against XRechnung 3.0.2 (EN 16931)
invapi_validate_xml	Validate XML with auto-detected format

Extraction

Tool	Description
invapi_extract_invoice	Extract structured invoice data from PDF or image
invapi_extract_qr	Extract QR code data from image

User

Tool	Description
invapi_get_user	Get account info and remaining API credits

Batch

Tool	Description
invapi_batch_convert	Run up to 100 conversion operations in a single request

Development

git clone https://github.com/invapi/invapi-mcp.git
cd invapi-mcp
npm install
npm run dev

License

MIT