Cobalt

There is a better alternative for other platforms but it is only for private servers (and limited versions) available at Sinum

Private server for latest does not work because of EOS (I believe added in S22 or something?)

SSL Bypass for Fortnite.
Hopefully when I have a lot of time I'll make a new SSL Bypass with a BUNCH of features.

How to change the port or IP

Go to settings.h and change URL_HOST and URL_PORT to what you want.

How to enable hybrid

Go to settings.h and change the variable CobaltUsage to ECobaltUsage::Hybrid.

There is no public way to launch latest anymore without the anticheat!

OUTDATED: You can literally open the game with a proxy open now lol, but I'll keep this here

Recording requests on latest

Download LawinServerV1 and run install_packages.bat and then start.bat.

In Cobalt, change the mode to hybrid (tutorial) and make sure URL_HOST is 127.0.0.1 (localhost) and URL_PORT is 3551 (default LawinServerV1 port) in settings.h.

How to have Fiddler open and connect to XMPP and matchmaker

Thanks Lawin for this method.
Go to the CloudStorage folder in your LawinServerV1 and open DefaultEngine.ini and change it to

[OnlineSubsystemMcp.Xmpp]
ServerAddr="ws://xmpp-service-prod.ol.epicgames.com"
Protocol=ws
bUseSSL=false

[OnlineSubsystemMcp.Xmpp Prod]
ServerAddr="ws://xmpp-service-prod.ol.epicgames.com"
Protocol=ws
bUseSSL=false

Put this into your FiddlerScript.

import Fiddler;

class Handlers
{
    static function OnBeforeRequest(oSession: Session) {
        if (oSession.hostname.StartsWith("xmpp-service")) 
        {
            oSession.oRequest.headers.UriScheme = "https";
        }
        if (oSession.hostname.StartsWith("fortnite-matchmaking")) 
        {
            oSession.oRequest.headers.UriScheme = "https";
        }
        if (oSession.hostname.StartsWith("fortnite-mm")) 
        {
            oSession.oRequest.headers.UriScheme = "https";
        }
    }
        
    static function OnBeforeResponse(oSession: Session) {
        oSession.utilReplaceInResponse("wss://", "ws://");
    }
}

Credits

Memcury - https://github.com/kem0x/Memcury
Neonite++ for the signatures and curl hook - https://github.com/PeQuLeaks/NeonitePP-Fixed/tree/1.4