EventStore – Get detailed information about persistent subscription

I was recently working on a connection issue with Eventstore and persistent subscriptions, when I came across a helpful url that gives more detail about the persistent subscription.
EventStore Persistent Subscriptions Dashboard

With chrome open to the persistent subscription dashboard, then open the chrome dev tools, you will see a bunch of calls to a “/subscriptions” endpoint.
Chrome Dev Tools
This endpoint loads all of the information seen on the screen for each persistent subscription you have defined.
[
  {
    "links": [
      {
        "href": "http://localhost:2113/subscriptions/%24ce-Foo/FooSubscription/info",
        "rel": "detail"
      }
    ],
    "eventStreamId": "$ce-Foo",
    "groupName": "FooSubscription",
    "parkedMessageUri": "http://localhost:2113/streams/%24persistentsubscription-%24ce-Foo::FooSubscription-parked",
    "getMessagesUri": "http://localhost:2113/subscriptions/%24ce-Foo/FooSubscription/1",
    "status": "Live",
    "averageItemsPerSecond": 0.0,
    "totalItemsProcessed": 6928,
    "lastProcessedEventNumber": 1061119,
    "lastKnownEventNumber": 1061128,
    "connectionCount": 3,
    "totalInFlightMessages": 0
  }
]
As you can see the response object has some basic information, however the “links” collection provides another url, “/info” for the specific persistent subscription.
{
	"links": [{
		"href": "http://localhost:2113/subscriptions/%24ce-Foo/FooSubscription/info",
		"rel": "detail"
	},
	{
		"href": "http://localhost:2113/subscriptions/%24ce-Foo/FooSubscription/replayParked",
		"rel": "replayParked"
	}],
	"config": {
		"resolveLinktos": true,
		"startFrom": -1,
		"messageTimeoutMilliseconds": 30000,
		"extraStatistics": false,
		"maxRetryCount": 10,
		"liveBufferSize": 500,
		"bufferSize": 500,
		"readBatchSize": 20,
		"preferRoundRobin": true,
		"checkPointAfterMilliseconds": 2000,
		"minCheckPointCount": 10,
		"maxCheckPointCount": 1000,
		"maxSubscriberCount": 0,
		"namedConsumerStrategy": "RoundRobin"
	},
	"eventStreamId": "$ce-Employee",
	"groupName": "EmployeeSvc",
	"status": "Live",
	"averageItemsPerSecond": 0.0,
	"parkedMessageUri": "http://localhost:2113/streams/%24persistentsubscription-%24ce-Foo::FooSubscription-parked",
	"getMessagesUri": "http://localhost:2113/subscriptions/%24ce-Foo/FooSubscription/1",
	"totalItemsProcessed": 6928,
	"countSinceLastMeasurement": 0,
	"lastProcessedEventNumber": 1061119,
	"lastKnownEventNumber": 1061128,
	"readBufferCount": 0,
	"liveBufferCount": 500,
	"retryBufferCount": 0,
	"totalInFlightMessages": 0,
	"connections": [{
		"from": "10.1.1.101:50753",
		"username": "admin",
		"averageItemsPerSecond": 0.0,
		"totalItemsProcessed": 35,
		"countSinceLastMeasurement": 0,
		"extraStatistics": [],
		"availableSlots": 10,
		"inFlightMessages": 0
	},
	{
		"from": "10.1.1.102:5169",
		"username": "admin",
		"averageItemsPerSecond": 0.0,
		"totalItemsProcessed": 35,
		"countSinceLastMeasurement": 0,
		"extraStatistics": [],
		"availableSlots": 10,
		"inFlightMessages": 0
	},
	{
		"from": "10.1.1.103:55791",
		"username": "admin",
		"averageItemsPerSecond": 0.0,
		"totalItemsProcessed": 36,
		"countSinceLastMeasurement": 0,
		"extraStatistics": [],
		"availableSlots": 10,
		"inFlightMessages": 0
	}]
}
Opening the “/info” link provides you with the full persistent subscription configuration, current metrics and what was helpful to me was a collection of the current connections.