pop-mcp

MCP (Model Context Protocol) server for POP — enabling LLMs to generate, submit, and manage Italian e-invoices (FatturaPA/SdI), Peppol invoices, and PDF invoices directly from AI assistants.

npm: @getpopapi/pop-mcp

What is POP?

POP is a cloud service for electronic invoice generation and delivery, supporting:

• 🇮🇹 Italian e-invoicing (FatturaPA/SdI) — compliant with D.Lgs. 127/2015

• 🇪🇺 Peppol — pan-European cross-border B2B invoicing (UBL 2.1)

• 📄 PDF invoices — branded, with email delivery

• ✅ Validation — fiscal codes, VAT numbers, document pre-submission checks

• 🗄️ Preservation — Italian legal archival (conservazione sostitutiva)

Related MCP server: mcp-fattura-elettronica-it

Tools Available (11 total)

Invoice Creation

Status & Retrieval

Validation & Advanced SdI

Prerequisites

• Node.js >= 18

• A POP license key

• For SdI/Peppol submission: active integration on your POP account (Basic/Growth plan)

Authentication

Get Your License Key

New to POP? Visit popapi.io to create your account and get your license key.

API-only users can activate their account and obtain a license_key with this flow:

1. Open https://popapi.io/otp-login/

2. Enter your email address

3. Receive a one-time password (OTP) by email and enter it

4. Complete the configuration wizard

5. Open https://popapi.io/ → Account > API

6. Copy the default generated license_key

Key Management

• Your account includes one default license_key, visible under Account > API

• You can generate additional keys linked to the same account from that same page

• Every license_key must be treated as a secret credential — do not commit it to source control

Recommended First Steps

1. Get your license_key

2. Test it with GET /account-profile

3. Send one document-generation request with a real payload

4. Add optional delivery integrations only after local generation works

Installation

From npm (recommended)

npm install -g @getpopapi/pop-mcp

From Source

git clone https://github.com/getpopapi/pop-mcp
cd pop-mcp
npm install
npm run build

Configuration

Set your POP license key as an environment variable:

export POP_API_KEY=your_license_key_here

Optional — use the staging environment:

export POP_ENVIRONMENT=staging

Claude Desktop Setup

Add to your claude_desktop_config.json:

If installed from npm:

{
  "mcpServers": {
    "pop": {
      "command": "pop-mcp",
      "env": {
        "POP_API_KEY": "your_license_key_here"
      }
    }
  }
}

If running from source:

{
  "mcpServers": {
    "pop": {
      "command": "node",
      "args": ["/path/to/pop-mcp/dist/cli.js"],
      "env": {
        "POP_API_KEY": "your_license_key_here"
      }
    }
  }
}

Config file locations:

• macOS: ~/Library/Application Support/Claude/claude_desktop_config.json

• Windows: %APPDATA%\Claude\claude_desktop_config.json

• Linux: ~/.config/Claude/claude_desktop_config.json

Remote MCP (HTTP)

pop-mcp is also available as a remote, generic MCP server at:

https://mcp.popapi.io/mcp

This is a shared, multi-tenant endpoint — unlike the stdio path above, it does not read POP_API_KEY from the server's environment. Every request must carry your own POP license key as a Bearer token:

Authorization: Bearer <your_license_key>

Any MCP-speaking HTTP client can connect: Claude (remote connector), the OpenAI Responses API, n8n, MCP Inspector, or a custom integration — not just Claude Desktop. All invoice, status, advanced, and onboarding tools are available; onboarding tools use their own onboarding_token per call and don't require the Bearer key.

Example with MCP Inspector:

npx @modelcontextprotocol/inspector

Configure it to connect to https://mcp.popapi.io/mcp with header Authorization: Bearer <your_license_key>.

Example with curl (tools/list — every request requires the Bearer header, including this one):

curl -X POST https://mcp.popapi.io/mcp \
  -H "Content-Type: application/json" \
  -H "Accept: application/json, text/event-stream" \
  -H "Authorization: Bearer your_license_key_here" \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/list"}'

A missing or malformed Authorization header returns a 401 with error_code: "unauthorized_user" before any POP API call is made. An invalid-but-well-formed key is passed straight through to POP's API and surfaces whatever error POP returns (unauthorized_user, insufficient_level, etc.) — the server does not re-validate keys itself.

This endpoint runs as a Vercel serverless function (api/mcp.ts → src/mcpHandler.ts). To run it locally: npx vercel dev (requires vercel link to the project first).

Tool Reference

The license_key is always injected automatically from POP_API_KEY — never pass it manually.

pop_create_sdi_invoice

Generate an Italian FatturaPA XML document. Optionally submit it to the SdI (Sistema di Interscambio).

MCP inputs:

Integration options for integration.use:

• "sdi-via-pop" or "sdi" — Submit via POP SdI

• "pop-to-webhook" — Deliver to a webhook (requires id)

• "fatture-in-cloud" — Deliver to Fatture in Cloud

API payload sent:

{
  "license_key": "YOUR_LICENSE_KEY",
  "user_agent": "pop-mcp",
  "user_agent_version": "1.0.0",
  "data": { "...invoice fields..." },
  "integration": { "use": "sdi-via-pop", "action": "create" }
}

integration is omitted when submit_to_sdi is false and no override is provided (XML-only generation).

pop_create_peppol_invoice

Generate a Peppol UBL 2.1 document. Optionally submit it to the Peppol network.

MCP inputs:

Integration options for integration.use:

• "peppol-via-pop" or "peppol" — Submit via POP Peppol

• "pop-to-webhook" — Deliver to a webhook (requires id)

API payload sent:

{
  "license_key": "YOUR_LICENSE_KEY",
  "user_agent": "pop-mcp",
  "user_agent_version": "1.0.0",
  "data": { "...invoice fields..." },
  "integration": { "use": "peppol-via-pop", "action": "create" }
}

pop_create_pdf_invoice

Generate a branded PDF invoice. Optionally email it to up to 3 recipients.

MCP inputs:

data.pdf fields:

API payload sent:

{
  "license_key": "YOUR_LICENSE_KEY",
  "user_agent": "pop-mcp",
  "user_agent_version": "1.0.0",
  "data": {
    "...invoice fields...",
    "pdf": {
      "doc_type_title": "Invoice",
      "logo_url": "https://example.com/logo.png",
      "head": { "store_info_address": "Via Roma 1, 00100 Roma IT", "billing": [] },
      "total_tax": "22.00",
      "email_invoice": { "to": ["customer@example.com"] }
    }
  }
}

pop_get_invoice_status

Retrieve the SdI processing status and notifications for a submitted invoice.

MCP inputs:

API payload sent:

{
  "license_key": "YOUR_LICENSE_KEY",
  "integration": { "uuid": "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx" }
}

SdI notification statuses: pending · accepted · rejected · delivery

SdI processing is asynchronous and can take minutes to hours. Retry if no notifications are returned yet.

pop_get_peppol_document

Retrieve a Peppol document from the network by UUID.

MCP inputs:

API payload sent:

{
  "license_key": "YOUR_LICENSE_KEY",
  "integration": { "uuid": "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx", "zone": "IT" }
}

zone is omitted from the payload if not provided.

pop_get_sdi_document

Retrieve an archived SdI (FatturaPA) document from POP storage by UUID.

MCP inputs:

API payload sent:

{
  "license_key": "YOUR_LICENSE_KEY",
  "integration": { "uuid": "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx" }
}

Requires: Basic+ plan with active SdI integration.

pop_verify_sdi_document

Validate an SdI XML document for compliance before submission. Does not submit the document.

MCP inputs:

API payload sent:

{
  "license_key": "YOUR_LICENSE_KEY",
  "skip_business_check": true,
  "integration": { "xml": "<base64-encoded-xml-string>" }
}

Validation checks performed: XML schema conformance · fiscal code format · VAT number validity · required field presence · amount consistency

Requires: Basic+ plan with active SdI integration and registered business.

pop_preserve_document

Archive an SdI document in certified long-term digital storage (conservazione sostitutiva). Italian law requires invoices to be preserved for 10 years.

MCP inputs:

API payload sent:

{
  "license_key": "YOUR_LICENSE_KEY",
  "integration": { "uuid": "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx" }
}

Important: Only call this tool when pop_get_invoice_status returns status RC (Ricevuta di Consegna) or MC (Mancata Consegna). Do not call for statuses NS, EC, SE, or DT.

Requires: Basic+ plan with active SdI integration.

Usage Examples

Generate a Simple Italian Invoice (XML Only)

Ask your AI assistant:

"Create a FatturaPA invoice for 1000€ + 22% VAT to Rossi SRL (VAT IT12345678901, Milan). My company is Bianchi SRL (VAT IT98765432109, Rome), using payment method bank transfer to IBAN IT60X0542811101000000123456."

Submit Invoice to SdI

"Create and submit to SdI an invoice #45 for consulting services, 500€ + 22% VAT to customer Mario Rossi (fiscal code RSSMRA80A01H501U) in Rome."

Check Invoice Status After Submission

"What's the status of SdI invoice with UUID abc123-def456-...?"

Generate PDF with Email Delivery

"Create a PDF invoice for order #123 and email it to customer@example.com."

Verify SdI Document Before Sending

"Verify SdI document with UUID abc123-... for compliance before submission."

Plan Requirements

Testing

MCP Inspector (Interactive)

npm run inspector
# or
npx @modelcontextprotocol/inspector dist/cli.js

Quick Smoke Test

POP_API_KEY=your_key node -e "
import('./dist/cli.js').catch(e => {
  if (e.message.includes('stdin')) process.exit(0);
  console.error(e); process.exit(1);
});
"

Test Tool Schema Listing

echo '{"jsonrpc":"2.0","id":1,"method":"tools/list","params":{}}' | POP_API_KEY=test node dist/cli.js

Development

# Run with auto-reload
npm run dev

# Build
npm run build

# Clean build artifacts
npm run clean

Invoice Data Structure

The data parameter for invoice creation follows the FatturaPA structure:

data
├── id                    Invoice/order ID (numeric)
├── filename              Output filename without extension (e.g. 'IT99900088876_00009')
├── type                  "invoice" | "credit_note"
├── version               "FPR12" | "FPA12"
├── sdi_type              7-char SDI code ('0000000' for private individuals)
├── customer_type         "private" | "company" | "freelance" | "pa"
├── nature                VAT exemption code (required when rate is 0%, e.g. 'N2.1', 'N6.1')
├── transmitter_data
│   ├── transmitter_id    { country_id, id_code }
│   ├── progressive       Transmission progressive ID (e.g. '00001')
│   ├── transmitter_format  "FPR12" | "FPA12"
│   ├── sdi_code          7-char code
│   ├── transmitter_contact { phone, email }
│   └── recipient_pec     PEC email (alternative to sdi_code)
├── transfer_lender       Supplier/seller
│   ├── personal_data     { tax_id_vat: { country_id, id_code, tax_regime }, company_name }
│   ├── place             { address, zip_code, city, province_id, country_id }
│   └── contact           { phone, email }
├── transferee_client     Customer/buyer
│   ├── personal_data     { tax_id_vat, tax_id_code (fiscal code for IT private), company_name }
│   └── place             { address, zip_code, city, province_id, country_id }
├── invoice_body
│   ├── general_data      { doc_type (TD01|TD04), date (YYYY-MM-DD), invoice_number, currency }
│   └── total_document_amount
├── order_items[]
│   ├── description, quantity, unit
│   ├── unit_price, total_price
│   ├── rate              VAT rate as string (e.g. '22.00')
│   ├── total_tax         VAT amount (number)
│   └── item_type         "product" | "shipping" | "fee"
├── payment_data
│   ├── terms_payment     TP01 (instalment) | TP02 (full) | TP03 (advance)
│   ├── payment_details   MP01 (Cash) | MP02 (Check) | MP05 (Bank Transfer) | MP08 (Credit Card) | ...
│   ├── payment_amount
│   ├── beneficiary       Required for MP05 (bank transfer)
│   ├── financial_institution  Required for MP05
│   └── iban              Required for MP05
├── purchase_order_data   (optional) { id, date }
├── connected_invoice_data[]  (required for credit notes) { id, date }
├── overrides             (optional) { language, bollo_force_apply }
└── pdf                   (only for pop_create_pdf_invoice)
    ├── doc_type_title
    ├── logo_url
    ├── head              { store_info_address, billing[], shipping[] }
    ├── total_tax
    ├── email_invoice     { to[] (max 3), from }
    └── footer_text

Error Reference

Related Projects

• n8n-nodes-pop — n8n community nodes for POP

• POP — Official website

• API Documentation — Postman docs

License

MIT © getpopapi