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Participant
September 6, 2026

connection with chat gpt

  • September 6, 2026
  • 3 replies
  • 227 views

Adobe for ChatGPT is installed and authenticated successfully, and Adobe tools are exposed to ChatGPT. However, every actual Adobe tool call fails before execution with:

MCP streamable transport probe failed with HTTP 403 from adobe.io

Endpoint:
https://photoshop-mcp-service.adobe.io/v3-creativity-b8f2a/mcp

Tested with Adobe Firefly image generation and Adobe initialization. The same error occurs consistently.

I have already reconnected the Adobe plugin, reauthorized the Adobe account, changed plugin settings, and tested again. The tools remain visible, but execution is blocked by the MCP transport 403.

Environment:

  • ChatGPT Plus
  • Adobe Firefly Pro Plus
  • Personal Adobe account
  • Japan

This appears to occur at the Adobe/ChatGPT MCP transport layer before the requested Adobe operation is executed.

Please investigate the authorization/transport configuration for the Adobe for ChatGPT MCP endpoint.

    3 replies

    Participant
    September 11, 2026

    I can also reproduce this issue on September 11, 2026, while trying to use the Adobe integration in ChatGPT with my Lightroom Cloud library.

    - Lightroom Web works normally with the same Adobe account, and I can access my cloud photo library there.
    - Adobe for ChatGPT is installed and authenticated, and ChatGPT can see the Adobe tool definitions.
    - Actual tool calls fail before the Lightroom operation begins, with the following error:

    MCP streamable transport probe failed with HTTP 403 from adobe.io

    Endpoint:
    https://photoshop-mcp-service.adobe.io/v3-creativity-b8f2a/mcp

    - Disconnecting and reconnecting the Adobe integration has not resolved the issue.
    - My goal is to use ChatGPT to search and organize my Lightroom Cloud photo library.

    The difference between working Lightroom Web access and failing Adobe tool calls may help isolate the issue to the integration's authorization/transport path, although I cannot confirm the root cause.

    Please add this reproduction to the investigation and let us know when a fix or a supported workaround is available. Thank you.

    Ten A
    Community Expert
    Community Expert
    September 7, 2026

    セットアップ出来ていれば以下のようにチャット出来るはずなんですけど、必要な通信がブロックされているとかないですか?

    ここでは、取得に失敗していますが、アカウントへの再接続後の確認では正常に取得できました。

    しかしながら、単純にChatGPTに接続状況を確認するほうが手っ取り早いです。

    @Adobe What tools and capabilities are available for my account?

    まず、こんな感じのプロンプトで確認してください。アカウントに正常に接続できていれば色々と表示されるはずです。

    あと、Design for Adobeの利用に関してはFireflyはほとんど関係なくて、テンプレート等の利用に関連してAdobeExpressもしくはCreativeCloudのサブスクリプションの有無が影響します。

    Participant
    September 6, 2026

    photoshop-mcp-service.adobe.io/.../mcp の403、Pro Plus有効、10,000 credits、ChatGPT側でAdobe tools露出済み、実行だけ全滅。この4点を入れる。