Click on the Server icon at the top left of the Agent UI and "Add Device" under Devices. Or in Live View click on the Edit icon at the bottom right and "Add New Device"
Choose from the available list. To start the wizard, which walks you through discovering devices on the local network and uses the Agent camera database to connect to your camera click on "IP Camera Wizard". If you have an ONVIF compatible camera click on "ONVIF". If you have an RTSP or MJPEG or other URL already for your camera click on Video Source or if you are adding an audio source like a local USB microphone or other network audio source click on "Audio Source".
Configuration
The second step when adding a new device is to setup some basic features. If you check "Alerts" Agent will setup your camera with a simple motion detector so it's ready to raise Alert events. To record when Agent detects motion check the "Record on Detect" option. If you have a high resolution camera you can check "Resize" to reduce the resolution of it and save some CPU usage. "Record Raw" means that Agent will record the stream directly from the camera to disk without encoding it which can dramatically reduce resource usage. Raw Record is only available for network video sources (not USB cameras or other local devices like Desktop streams). All of these options can be edited later.
Using the Wizard
Start by typing the name of your camera manufacturer. Agent will provide suggestions. Click on a suggestion to select it. If your manufacturer isn't known or isn't listed you can choose "Unlisted" or if the model isn't listed you can choose <Manufacturer>: Unlisted. Agent will use this to narrow down the addresses it will try to get a video connection (using just Unlisted may take a while as Agent has a database of tens of thousands of cameras).
Next enter your camera username and password. These should be the details you enter into the web or app interface to login to your camera (not your iSpyConnect.com login details!)
Enter the Channel (usually 0 for IP cameras but if you have a DVR with multiple cameras attached to it this might be a different number)
Next you will need to find or enter the Network Address of your camera. Agent can discover local addresses automatically. There's usually not a lot of information available about the devices from the network scan unfortunately so this might take a bit of trial and error. Click on the Device name to open the address up in a web browser (if you're on the same network Agent is running on) and if it's your IP camera click "Use" next to it. Alternatively you can enter your network address manually. This should be formatted like http://IP-ADDRESS:PORT or https://WEB-ADDRESS:PORT if you are adding a camera from an internet address. Click the icon to make Agent re-scan your network for devices.
Tip: It's important to setup your IP cameras with static IP addresses on your local network. If the IP address changes then Agent won't be able to connect to it. You can usually do this via your router configuration. There's a good guide for this here
When you have selected an address Agent will use the information you provided to scan the camera for available video endpoints. The ones it finds are provided in a list. Click "Use" to select it and finish adding the camera.
Tip: Try to choose an IP Camera option (instead of MJPEG or JPEG). IP Camera options frequently have audio and better framerates.
If nothing is found double check the details you entered are correct. You may need to contact the manufacturer and ask them how to connect directly to their camera video streams and then add a device using "Video Source" and manually configure the video stream URL instead of using the Wizard, or if it supports ONVIF then add it as an ONVIF device instead.