diff --git a/readme.md b/readme.md
index 72f11516..4d46df65 100644
--- a/readme.md
+++ b/readme.md
@@ -104,7 +104,12 @@ If you don't want to expose your Keel service - I would recommend using [https:/
 Since only the owners of docker registries can control webhooks - it's sometimes convenient to use
 polling. Be aware that registries can be rate limited so it's a good practice to set up reasonable polling intervals.
 
-
+```
+keel.sh/trigger=poll
+keel.sh/pollSchedule=@every 1m
+keel.sh/registryUsername=username_secret_ref
+keel.sh/registryPassword=password_secret_ref
+```
 
 ### Step 2: Kubernetes
 
diff --git a/registry/registry.go b/registry/registry.go
index 11470cdf..f6ec9a9f 100644
--- a/registry/registry.go
+++ b/registry/registry.go
@@ -11,12 +11,15 @@ var (
 	ErrTagNotSupplied = errors.New("tag not supplied")
 )
 
+// Repository - holds repository related info
 type Repository struct {
 	Name string
-	Tags []string
+	Tags []string // available tags
 }
 
 type Client interface {
+	Get(opts Opts) (*Repository, error)
+	Digest(opts Opts) (digest string, err error)
 }
 
 func New() *DefaultClient {