Gateway
Each API is a public path on this gateway. Calls are forwarded to a provider (using its keys from Connections) or to a URL, falling back along the list.
Incoming webhooks
Give a provider a gateway address for its callbacks. The gateway checks the signature with the secret kept here, then forwards the event to your own service, which never needs the secret.
Global limits
0 means no limit. An API can set its own per-key limit.