diff --git a/Assets/Stash/Scripts/Core/StashConstants.cs b/Assets/Stash/Scripts/Core/StashConstants.cs
index 9af78c3..f26b93f 100644
--- a/Assets/Stash/Scripts/Core/StashConstants.cs
+++ b/Assets/Stash/Scripts/Core/StashConstants.cs
@@ -15,6 +15,7 @@ public class StashConstants
         public const string CustomLogin = "/sdk/custom_login/approve_with_jwt";
         public const string LoginAppleGameCenter = "/sdk/custom_login/approve_apple_game_center";
         public const string LoginGooglePlayGames = "/sdk/custom_login/google_play";
+        public const string LoginFacebook = "/sdk/custom_login/facebook_auth";
         
     }
 }
diff --git a/Assets/Stash/Scripts/Core/StashCustomLogin.cs b/Assets/Stash/Scripts/Core/StashCustomLogin.cs
index 8fa2b7e..35db36d 100644
--- a/Assets/Stash/Scripts/Core/StashCustomLogin.cs
+++ b/Assets/Stash/Scripts/Core/StashCustomLogin.cs
@@ -22,6 +22,7 @@ public static class StashCustomLogin
     /// <param name="playerId">Player identification, that will be used to identify purchases.</param>
     /// <param name="idToken">Valid identification token (OICD) of the player.</param>
     /// <param name="profileImageUrl">URL to the player's profile image/avatar to be displayed during login and on web shop.</param>
+    /// <param name="environment">Stash API environment (Defaults to Test).</param>
     /// <returns>Returns a confirmation response, or throws StashAPIRequestError if fails.</returns>
     public static async Task<LinkResponse> CustomLogin(string code, string playerId, string idToken, string profileImageUrl, StashEnvironment environment = StashEnvironment.Test)
     {
@@ -146,6 +147,7 @@ public static async Task<LinkResponse> LinkAppleGameCenter(string code, string p
     /// <param name="code">Stash code challenge from the deeplink.</param>
     /// <param name="playerId">Player identification, that will be used to identify purchases.</param>
     /// <param name="authCode">The authorization code generated using RequestServerSideAccess</param>
+    /// <param name="environment">Stash API environment (Defaults to Test).</param>
     /// <returns>A LinkResponse object.</returns>
     public static async Task<LinkResponse> LinkGooglePlayGames(string code, string playerId, string authCode, StashEnvironment environment = StashEnvironment.Test)
     {
@@ -186,5 +188,58 @@ public static async Task<LinkResponse> LinkGooglePlayGames(string code, string p
             throw new StashRequestError(result.StatusCode, result.Data);
         }
     }
+    
+    
+    
+    /// <summary>
+    /// Logs in to stash web shop via Facebook account.
+    /// Requires valid access token generated from Facebook login.
+    /// </summary>
+    /// <param name="code">Stash code challenge from the deeplink.</param>
+    /// <param name="playerId">Player identification, that will be used to identify purchases.</param>
+    /// <param name="appId">Facebook app id.</param>
+    /// <param name="accessToken">Facebook access token.</param>
+    /// <param name="environment">Stash API environment (Defaults to Test).</param>
+    /// <returns>A LinkResponse object.</returns>
+    public static async Task<LinkResponse> LinkFacebook(string code, string playerId, string appId, string accessToken, StashEnvironment environment = StashEnvironment.Test)
+    {
+        // Create the request body with the challenge and internal user id
+        var requestBody = new LoginFacebook()
+        {
+            code = code,
+            appId = appId,
+            inputToken = accessToken,
+            user = new LoginFacebook.User()
+            {
+                id = playerId
+            }
+        };
+    
+        // Set the URL for the link account endpoint
+        string requestUrl = environment.GetRootUrl() + StashConstants.LoginGooglePlayGames;
+        // Make a POST request to link the access token
+        Response result = await RestClient.Post(requestUrl, JsonUtility.ToJson(requestBody));
+    
+        // Check the response status code
+        if (result.StatusCode == 200)
+        {
+            try
+            {
+                Debug.Log("[RESPONSE RAW] " + result.Data);
+                LinkResponse resultResponse = JsonUtility.FromJson<LinkResponse>(result.Data);
+                return resultResponse;
+            }
+            catch
+            {
+                // Throw an error if there is an issue parsing the response data
+                throw new StashParseError(result.Data);
+            }
+        }
+        else
+        {
+            // Throw an error if the API request was not successful
+            throw new StashRequestError(result.StatusCode, result.Data);
+        }
+    }
 }
 }
\ No newline at end of file
diff --git a/Assets/Stash/Scripts/Models/LoginFacebook.cs b/Assets/Stash/Scripts/Models/LoginFacebook.cs
new file mode 100644
index 0000000..511595f
--- /dev/null
+++ b/Assets/Stash/Scripts/Models/LoginFacebook.cs
@@ -0,0 +1,19 @@
+using System;
+
+namespace Stash.Models
+{
+    [Serializable]
+    public class LoginFacebook
+    {
+        public string code;
+        public string appId;
+        public string inputToken;
+        public User user;
+        
+        [Serializable]
+        public class User
+        {
+            public string id;
+        }
+    }
+}
\ No newline at end of file
diff --git a/Assets/Stash/Scripts/Models/LoginFacebook.cs.meta b/Assets/Stash/Scripts/Models/LoginFacebook.cs.meta
new file mode 100644
index 0000000..78e0374
--- /dev/null
+++ b/Assets/Stash/Scripts/Models/LoginFacebook.cs.meta
@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: fb30523338f04d0c896357585ab7b49b
+timeCreated: 1721813988
\ No newline at end of file