@arjunyel

Connectors are documented here: https://fusionauth.io/docs/v1/tech/connectors/

Machine to machine auth is the client credentials grant: https://fusionauth.io/docs/v1/tech/oauth/#example-client-credentials-grant

Does 100 Machine To Machine Auth mean you can have 100 API entities?

Yes, that is correct.

While we continue to improve FusionAuth (and will always have a free community edition), if you are interested in paying for a specific feature to be built, we're happy to chat. Please contact us and we'll be happy to discuss costs and timelines.