For developers

JSON in. Sealed PDF/A-3 out. Done.

One API call replaces your entire document compliance pipeline. No render pipeline to build. No PDF library to maintain. No Factur-X spec to read.

Start Free — 50 docs/month

No credit card required. API key generated immediately on signup.

From JSON invoice to sealed Factur-X in one call

curl

curl -X POST https://api.sealdoc.eu/api/invoices/generate \
  -H "X-Api-Key: sd_live_..." \
  -H "Content-Type: application/json" \
  -d '{
    "profile": "FacturX1Basic",
    "seller": { "name": "Acme B.V.", "vatId": "NL123456789B01" },
    "buyer":  { "name": "Globex GmbH", "vatId": "DE987654321" },
    "lines":  [{ "description": "License", "quantity": 1, "netAmount": 1000.00 }],
    "totals": { "netTotal": 1000.00, "vatTotal": 210.00, "grossTotal": 1210.00 }
  }'
# Response: Factur-X 1.0 BASIC PDF/A-3 with embedded CII XML
# Set "profile": "XRechnungDe" for German federal or large German buyers.

JavaScript

const response = await fetch('https://api.sealdoc.eu/api/invoices/generate', {
  method: 'POST',
  headers: {
    'X-Api-Key': 'sd_live_...',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    profile: 'FacturX1Basic',
    seller: { name: 'Acme B.V.', vatId: 'NL123456789B01' },
    buyer:  { name: 'Globex GmbH', vatId: 'DE987654321' },
    lines:  [{ description: 'License', quantity: 1, netAmount: 1000.00 }],
    totals: { netTotal: 1000.00, vatTotal: 210.00, grossTotal: 1210.00 },
  }),
})
// Response: Factur-X 1.0 BASIC PDF/A-3 with embedded CII XML
const blob = await response.blob()  // PDF/A-3 bytes

Python

import requests

response = requests.post(
    'https://api.sealdoc.eu/api/invoices/generate',
    headers={
        'X-Api-Key': 'sd_live_...',
        'Content-Type': 'application/json',
    },
    json={
        'profile': 'FacturX1Basic',
        'seller': {'name': 'Acme B.V.', 'vatId': 'NL123456789B01'},
        'buyer':  {'name': 'Globex GmbH', 'vatId': 'DE987654321'},
        'lines':  [{'description': 'License', 'quantity': 1, 'netAmount': 1000.00}],
        'totals': {'netTotal': 1000.00, 'vatTotal': 210.00, 'grossTotal': 1210.00},
    },
)
# Response: Factur-X 1.0 BASIC PDF/A-3 with embedded CII XML
pdf_bytes = response.content

Integration options

Three ways in. All EU-sovereign.

Integration	Status	Install
n8n	Live	npm i n8n-nodes-sealdoc
Direct REST API	Live	OpenAPI 3.0 spec
Webhooks	Live	HMAC-signed
Make	Coming soon	-
Zapier	Coming soon	-
Exact Online	Coming soon	-

API guarantees

Idempotency keys on all job endpoints — safe to retry on network failure
OCR is idempotent on born-digital pages — safe to retry
HMAC-signed webhooks with configurable retry policy and exponential backoff
Semantic versioning — no breaking changes without a major version bump
Staging environment at staging-api.sealdoc.eu
Rate limits documented per plan, headers included in every response

Supported output profiles

Select the profile that matches your buyer's requirement.

FacturX1Minimum

FacturX1BasicWL

FacturX1Basic

FacturX1EN16931

FacturX1Extended

XRechnungDe (Enterprise)

Get your API key in 2 minutes

Start Free — 50 docs/month

No credit card required. API key generated immediately on signup.