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Deepthi
Level 1
Apr 29, 2026 11:37 AM UTC
Solved

Unable to connect claude desktop to Marketo engage

Hi Team,

I am unable to connect Claude to Marketo MCP server.

This command didn’t work, the error I get is can’t connect to MCP server.

 

{
  "mcpServers": {
    "marketo": {
      "type": "http",
      "url": "https://marketo-mcp.adobe.io/mcp",
      "headers": {
        "X-Marketo-Client-Id": "YOUR-CLIENT-ID",
        "X-Marketo-Client-Secret": "YOUR-CLIENT-SECRET",
        "X-Marketo-Munchkin-Id": "YOUR-MUNCHKIN-ID"
      }
    }
  }
}

 

Kindly help with the issue.

 

Thanks,

Deepthi.

ManishRohilla
ManishRohillaAccepted solution
Level 2
Jun 9, 2026 8:38 PM UTC

Hey Deepthi, I hit this same wall during the beta. Building on Sanford's point, there are really two separate things here:

  1. The access one already flagged: The MCP server's still closed beta, so until your instance is added you'll get that connection error no matter how clean the config looks. The support ticket is the right call.
  2. The other is Claude desktop specific: That "type": "http" block in the docs won't work with Claude desktop. Claude desktop's config is built for local servers, so for a remote one you have to bridge it with mcp-remote through npx, passing your Client ID, Secret and Munchkin ID as header arguments.

I wrote the whole thing up after I got it working, in case it saves you the headache: https://marketing-automation.ca/en-us/blog/connecting-ai-to-marketo-what-everyone-setting-this-up-should-know-first/. Feel free to give a shoutout if you’re in the beta and still facing issues, I’ll be happy to help!

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8 replies

SanfordWhiteman
User Group Leader
SanfordWhitemanUser Group Leader
User Group Leader
Apr 29, 2026 3:53 PM UTC

You did create and fill in actual API credentials, right?

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    DeepthiGo1
    Level 2
    Apr 29, 2026 4:07 PM UTC

    Hi Sanford,

     

    Yes created API user and got these values:

    • Client ID
    • Client Secret
    • Munchkin Account ID

    Followed instructions as mentioned here: MCP Server | Adobe Marketo Engage

     

    Thanks,

    Deepthi.

    Translate
    SanfordWhiteman
    User Group Leader
    SanfordWhitemanUser Group Leader
    User Group Leader
    Apr 30, 2026 3:22 AM UTC

    Don’t have anyone who both approved (internally) and got into the Beta!

    Translate
    DeepthiGo1
    Level 2
    Apr 30, 2026 4:50 AM UTC

    Hi Sanford,

     

    Please guide me how should I proceed, should I raise a support ticket with Marketo to add to beta.

     

    Thanks,

    Deepthi.

    Translate
    SanfordWhiteman
    User Group Leader
    SanfordWhitemanUser Group Leader
    User Group Leader
    Apr 30, 2026 5:28 AM UTC

    Yes.

    Translate
    adesrala1
    Adobe Champion
    adesrala1Adobe Champion
    Adobe Champion
    Jun 8, 2026 7:23 PM UTC

    In case this is still open, another option is to reach out to your Marketo CSM. They can help confirm whether your instance has been enabled for the MCP beta and guide you through the onboarding process.

    You can also submit the beta access request form here:

    https://forms.cloud.microsoft/Pages/ResponsePage.aspx?id=Wht7-jR7h0OUrtLBeN7O4Y-uSf63sAxCmWyqMJg8eMFUMVZSVExSNDA3T0I4SEcwRDFSVTBGWU01Uy4u&origin=QRCode

    If you're not yet enrolled in the beta, that could be the reason the MCP server connection is failing.

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    Found this helpful? Mark the thread as solved so other community members can quickly locate the answer.
    ManishRohilla
    ManishRohillaAccepted solution
    Level 2
    Jun 9, 2026 8:38 PM UTC

    Hey Deepthi, I hit this same wall during the beta. Building on Sanford's point, there are really two separate things here:

    1. The access one already flagged: The MCP server's still closed beta, so until your instance is added you'll get that connection error no matter how clean the config looks. The support ticket is the right call.
    2. The other is Claude desktop specific: That "type": "http" block in the docs won't work with Claude desktop. Claude desktop's config is built for local servers, so for a remote one you have to bridge it with mcp-remote through npx, passing your Client ID, Secret and Munchkin ID as header arguments.

    I wrote the whole thing up after I got it working, in case it saves you the headache: https://marketing-automation.ca/en-us/blog/connecting-ai-to-marketo-what-everyone-setting-this-up-should-know-first/. Feel free to give a shoutout if you’re in the beta and still facing issues, I’ll be happy to help!

    Translate
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