Summary
Connects Claude to the Invapi E-Invoicing API for working with European invoice formats. You get conversion between UBL, CII, ZUGFeRD, Excel, and JSON, plus validation against XRechnung 3.0.2 standards. The extraction tools pull structured data from PDF invoices and images, including QR codes. There's also a batch operation that handles up to 100 conversions in one request. Reach for this when you're building accounting workflows, need to parse supplier invoices at scale, or have to output compliant XML for German or EU tax systems. Requires an API key from invapi.org, which operates on a credit system.
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one prompt install →@invapi/mcp-server
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
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Try For Free →Your agent targets a perfect 10 Code Health score. Deterministic. Every commit.
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Get API Key Now →belt cli automatically finds the best tools and skills for your agent. image, video, music, tts...
one prompt install →Configuration
INVAPI_API_KEY*secretYour API key for Invapi
Registryactive
Package@invapi/mcp-server
TransportSTDIO
AuthRequired
UpdatedFeb 22, 2026
