Trouble Installing HubSpot-MCP via Smithery CLI – Multiple Errors & 500 Internal Server Error

[Parvind]

Hi all,

I’ve been trying for the past two days to get the mcp-hubspot app installed using Smithery CLI, and I keep running into issues that are blocking progress. Here’s a breakdown of what I’ve encountered so far in case anyone else has been through this—or better yet, found a fix.

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Latest Error:

When I run the following command: npx -y @smithery/cli@latest install mcp-hubspot --client claude

I get this:: ✖ Failed to install mcp-hubspot
Error: Package resolution failed with status 500: Internal server error

This seems to be a backend issue—possibly with the package registry or Smithery service—but I haven’t found any documentation or status updates confirming this.

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Other Issues Faced Previously

1. Smithery CLI glitches

   The install command doesn’t always resolve dependencies smoothly, especially when scoped packages or custom clients like --client claude are involved.

2. HubSpot CMS compatibility issues

   Even when I managed to install other packages, I ran into version mismatches or incomplete configurations that required manually editing theme.json, fields.json, and other project scaffolding files.

3. Lack of documentation

   There’s very little documentation or step-by-step guidance for MCP-related packages or Smithery workflows beyond simple use cases. Advanced setups with custom clients or integrations (e.g., Claude, GPTs, etc.) are totally absent.

4. Ambiguous errors from CLI

   Most CLI errors aren’t descriptive and don’t provide actionable feedback, making troubleshooting extremely difficult. Even adding --debug doesn’t help much beyond a stack trace.

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Ask:

Has anyone in the community successfully installed mcp-hubspot using Smithery CLI recently? If so:

• What command did you use?

• Which Node/npm version are you on?

• Any tweaks to .env or file structure?

• Did you face and resolve this 500 error?

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I’d really appreciate any insights. It’s a promising setup, but these issues make onboarding extremely frustrating.

Thanks in advance,

Parvind Dutta

Founder, MapleSage

LinkedIn

[BérangèreL]

Hi @Parvind, I hope that you are well!

Thank you for reaching out to the HubSpot Community!

I'd like to share these resources for information on the topic:

- The HubSpot MCP Server - available in Public Beta
- Enable your agent to see and interact with data in HubSpot

Regarding the 4 points you mentioned above, I'd like to thank you for this valuable feedback!
And I'd recommend sharing it via the HubSpot Developer Feedback form.

I'd love to put you in touch with our Top Experts: Hi @Anton, @zach_threadint and @Teun do you have suggestions to help @Parvind, please?

Have a fantastic day and thanks so much in advance for your help!
Bérangère