APIs for Developers

Integrate document generation and electronic signature into your applications in just a few lines of code.

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DocX API

Generate professional PDF documents from Word templates (.docx). Ideal for quotes, invoices, contracts and all your business documents.

Customizable Word templates
JSON data merging
High-quality PDF export
Factur-X support (PDF/A-3)
Response time < 2s

curl -X POST https://docx.layerone.fr/render \
  -H "X-API-Key: your_api_key" \
  -F "[email protected]" \
  -F 'data={"client": "Acme Corp", "total": "€1500"}' \
  -o document.pdf

Documentation

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Sign API

Get your documents electronically signed. eIDAS compliant, with complete audit trail and automatic notifications.

Legal electronic signature (eIDAS)
Multi-signers
Automatic email notifications
Complete audit trail
Real-time webhooks

curl -X POST https://sign.layerone.fr/api/v1/documents \
  -H "X-API-Key: your_api_key" \
  -F "[email protected]" \
  -F 'signers=[{"email": "[email protected]"}]'

Documentation