einvoicewiz

Generate & validate EN 16931 e-invoices (Factur-X, ZUGFeRD, XRechnung); verification certificates

CommunityDegradedAPI key requiredGlobalFreeRead-only

What it can do

    What data it sees

    Do you need an account

    An API key from the service settings is required

    Generate & validate EN 16931 e-invoices (Factur-X, ZUGFeRD, XRechnung); verification certificates

    How to connect

    How to connect einvoicewiz to Claude

    The server address to paste into Claude settings:

    https://einvoicewiz.com/mcp

    1. Open Claude (claude.ai or the desktop app).
    2. Go to Settings → Connectors.
    3. Click Add custom connector.
    4. Paste the server address copied below into Remote MCP server URL and click Add.
    5. In a chat, click + → Connectors and switch the new connector on.

    Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.

    Authorization

    After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.

    How to connect einvoicewiz to ChatGPT

    The server address to paste into ChatGPT settings:

    https://einvoicewiz.com/mcp

    1. Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
    2. Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
    3. Open Settings → Connectors and click Create.
    4. Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
    5. Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
    6. In a new chat open + → Apps/Connectors and enable the connector.

    OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.

    Authorization

    On first use ChatGPT opens the service's sign-in window. Sign in and approve access.

    How to connect einvoicewiz to Cursor

    The server address to paste into Cursor settings:

    https://einvoicewiz.com/mcp

    Fastest: click Open in Cursor below and confirm the prompt.

    Manually:

    1. In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
    2. Paste the JSON copied below into ~/.cursor/mcp.json (per project: .cursor/mcp.json in the repo root).
    3. Save the file. The server appears in the MCP list; authorize it there if asked.

    Authorization

    If the service needs sign-in, an authorize button appears next to the server in the MCP list.

    Server tool list (7)

    Raw names from tools/list. Only developers need these.

    signupCreate an einvoicewiz API key with 20 free credits (no card). The key is shown once — store it.
    check_creditsCredits remaining and calls used for an API key.
    generate_einvoice_xmlInvoice JSON → validated EN 16931 CII XML (1 credit; failures free). profile: "en16931" (Factur-X/ZUGFeRD data, B2B) or "xrechnung" (German public sector; needs invoice.buyer_reference = Leitweg-ID and seller contact_email/contact_phone). Invoice schema: see https://einvoicewiz.com/openapi.json (required: invoice_number, issue_date, currency, seller{name,country}, buyer{name,country}, lines[{name,qty,unit_price,vat_rate}]). Returns {xml, validation, verify:{id,url}, credits_left}. On 422 the body lists the violated rules.
    create_facturx_pdfYour existing PDF invoice + invoice JSON → Factur-X / ZUGFeRD PDF/A-3 with embedded XML (1 credit). pdf_base64: the original PDF, base64-encoded (max 15 MB). Returns {pdf_base64, cert_id, verify_url, credits_left}. The output is validated (EN 16931 + PDF/A-3) before delivery; failures are not charged.
    validate_einvoiceValidate a Factur-X / ZUGFeRD / XRechnung file (PDF or XML, base64) against EN 16931 + KOSIT + PDF/A (1 credit). Returns the rule-level report {result:{status, errors[], warnings[], profile}, verify, credits_left}. verify is set only when the file passed.
    lookup_certificateLook up a verification certificate (EIW-…) — free, no key. Confirms which file hashes passed validation and when.
    which_format_do_i_needDecision helper (free, no key): which e-invoice format a recipient needs and whether a plain PDF is still acceptable.