# Merge Endpoint: POST /v2/pdf/merge Version: 2.0 Security: X-API-Key, api_key ## Query parameters: - `onPage` (integer) Page number on which to place the payment part receipt ## Request fields (multipart/form-data): - `file` (string, required) Base PDF file - `file2` (string, required) PDF file (single page) which should get merged onto the first document