The Vimeo API is available to all Vimeo plans and users and does not require payment to access. However, some features require a paid account. Learn more at 'Compare Vimeo plans'.
On a technical level, any server or client connected to the internet and capable of making standard HTTP requests can use the Vimeo API. Once you have created an API app and a valid auth token, you can use any REST client to make requests, from command-line curl to advanced debugging tools like Postman.
Developers will also need to be familiar with the features and capabilities available on Vimeo. In general, the Vimeo API can only perform actions that can be done on the vimeo.com website.