StraySpark - Unreal MCP Server - 200+ AI Tools for UE5 Editor Automation via MCP

Distribution Product Discussion
23

Yes, we actually have many users so far and we’ve asked for real reviews, but most feedback comes through emails. We can’t force anyone to leave public reviews or stars.

Redeeming the code on our website is mainly to get the latest updates, built versions, and related access. Product videos are coming soon.

24

This may be a scam but its hard to tell at this point.

  1. purchased a bundle.
  2. was sent a license link and confirmation.
  3. was provided no tool download.
  4. attempted to login to their installation docs using my license key and it said it was invalid.
  5. attempted to create an account on the site and it would not send me a signup confirmation. So I cannot actually create an account.
  6. Probably just putting in a dispute and getting it refunded back. The process to just get the download seems to scummy for me.
25

codex 能找到mcp，但是实际使用比如创建材质根本用不了。别买了。

26

Sorry for the trouble. Could you please clarify the issue you’re facing? Also, can you send us a quick email here: contact@strayspark.studio with the details so we can check and review it properly? We’ll gladly help you out.

27

Sorry to hear that. We tested it with Codex and it worked very well, including using all the tools and materials features. Could you please share the prompt and response you got so we can review it further and help you better?

28

hello.

This mcp server plugin is amazing. but have a big problem. Everytime the mcp want use the create_user_struct command. the engine crashed.

how can i fix it.

1 Like
29

Thanks for the high praise!

We’ve tracked down this bug and fixed the crash with create_user_struct. The fix will be available in the next version, which is coming out very soon. Stay tuned!

30

Unreal MCP server currently exposes save_level(save_all=true), but it uses FEditorFileUtils::SaveDirtyPackages(...), which can open the modal “Save Content” dialog.

For automation, we need a non-modal way to save all dirty packages or a known list of dirty packages. Right now this seems impossible without a custom Python/C++ workaround, e.g. calling EditorAssetLibrary.save_asset(...) from Python.

Is there a recommended built-in C++ API for saving dirty packages from an editor automation tool without showing any modal UI?

1 Like
31

Hi

You’re right that save_level(save_all=true) could show the Save Content dialog. That was a bug on our side, not an engine limitation, and it’s fixed in the next release. We were calling FEditorFileUtils::SaveDirtyPackages with bPromptUserToSave=true.

To answer the underlying question: yes, there are recommended built-in C++ APIs for non-modal saves.

For saving all dirty packages, you can use the same function with prompting disabled:

FEditorFileUtils::SaveDirtyPackages(
    /*bPromptUserToSave=*/false,
    /*bSaveMapPackages=*/true,
    /*bSaveContentPackages=*/true,
    /*bFastSave=*/false,
    /*bNotifyNoPackagesSaved=*/false,
    /*bCanBeDeclined=*/false);

Alternatively, you can use the scripting-safe wrapper:

UEditorLoadingAndSavingUtils::SaveDirtyPackages(
    bSaveMapPackages,
    bSaveContentPackages);

This is defined in FileHelpers.h and is what the Python unreal.EditorLoadingAndSavingUtils calls map to, so you should get the same behavior as your Python workaround without leaving C++.

For a known list of packages, use either:

UEditorLoadingAndSavingUtils::SavePackages(
    Packages,
    /*bOnlyDirty=*/true);

or:

FEditorFileUtils::PromptForCheckoutAndSave(
    Packages,
    bCheckDirty,
    /*bPromptToSave=*/false,
    ...);

Despite the name, bPromptToSave=false skips the dialog.

To enumerate dirty packages first, use:

FEditorFileUtils::GetDirtyWorldPackages();
FEditorFileUtils::GetDirtyContentPackages();

As an extra safeguard, you can wrap the save in:

TGuardValue<bool> Guard(GIsRunningUnattendedScript, true);

This helps suppress nested modal UI, such as source-control checkout prompts, and matches what the editor’s own scripting layer does. Running the editor with -unattended has the same global effect.

32

Please can you update the FAB change notes too :slight_smile: I thought it was still v2 haha

I find commenting is still tough, using claude and fable. Fable can create comment blocks but not actually add the comments.

Nice plugin. Very helpful.

1 Like
33

Thanks! Of course, I’ll update the FAB change notes and any related details. And yes, commenting has improved since v3 — I’ll keep working on making block comments easier for AI agents to create. Really appreciate the feedback!

34

Does it have capabilities to run of local LLMs? like Qwen3.6?

1 Like
35

Hi, yes, of course. I tested it with Qwen 3.6, Qwen 3.7, Kimi 2.6, DeepSeek V4 Pro, and Minimax 3, as these are among the best open-source and most affordable models. I’ll try to make some videos showcasing how they perform.

36

Hi! I’m considering Unreal MCP Server v4.5 for a C++ project migrating to final Unreal Engine 5.8, using Codex CLI as the MCP client.

Before purchasing, could you confirm:

  1. Does v4.5 fully support the final UE 5.8 release on Windows?

  2. Can it edit an existing Animation Blueprint and existing State Machine, specifically:

  • add states and transitions;

  • edit transition rules;

  • assign AnimSequences to Sequence Players;

  • add Event Graph nodes/variables;

  • compile, save, run PIE, and take a screenshot?

  1. Can it use an existi

    without modifying source assets?

  2. Can all of the above be executed through run_tool_script as one transaction with rollback on failure?

Thank you!

37

I found out after purchasing that this plugin does not support UE5.8. How can I get a refund?

38

I registered on this companies site to get the documentation and have received so many emails from them.

I have unsubscribed on every single one and even went to the website and unsubscribed there. I STILL get emails and promotional emails.

I’m putting this here to create awareness so the company is forced to fix their unsubscribe process. This is not GDPR compliant at all and illegal.

Product is great, but some really dodgy stuff happening here.

1 Like
39

Sorry about that, and thanks for the heads-up. Wish we’d received an email from you sooner so we could have solved this earlier! What’s your email address? We’ll get this fixed for you right away.

40

(post deleted by author)

41

I can’t write a letter to you , @good_geek21 , it says:

This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

contact@strayspark.studio
host heracles . mxrouting . net [65.109.144.50]
SMTP error from remote mail server after RCPT TO: ____
550-Unauthenticated mail not allowed from this range to protected domain,
550 nonspam senders request whitelisting at esf mxroute com

My question would be:

Do you have a demo video for Exactkey?

Thinking about purchasing but can’t find any videos showing it during usage.
And possibly a trial?

Does it work with blender 5.1 and 5.1+?

Thanks,
Attila