Connector Builder feature limits
When designing your connector, keep in mind the following limitations on Connector Builder features.
There's a limit of 50 test connections per org.
There's no limit on the number of flows per org.
Flows in Connector Builder don't count against the overall active flow limit per org on the Workflows platform. See Workflows system limits.
Connector Builder does support the following authentication methods:
OAuth 2.0 Authorization Code grant type
OAuth 2.0 Client Credential grant type
Generic header-based authentication, such as an API key or a combination of an application key and an API key
The following features and capabilities aren't supported:
Non-standard OAuth grant types
Connections to on-premises services