MAC address Vendor Lookup API is available as an extension for MISP – Open Source Threat Intelligence Platform. It allows making instant MAC Vendor Lookup for the MAC address attributes. To get vendor details and other information provided by the API, you only need to hover over the MAC address attribute value.
Download the extension: https://github.com/MISP/misp-modules
and many more...
Our database comes in the following forms: JSON, CSV, XML, Cisco vendorMacs.xml for maximum compatibility and fast integration into existing systems. The API version is also available.