Answer
Yes, Panasonic provides SDKs for recorders.
That technical information is available from the following URL.
https://bizpartner.panasonic.net/public/resource-finder/file?field_product_category_tid%5B0%5D=2025&category=2025&sort_by=title&sort_order=ASC&combine_keyword=key_develop_sdki-pro.com/global/en/surveillance/database/i-pro-device-integration/camera-integration-ps-api