phpstorm mcp not working

[eondcom]

claude desktop install and setting jetbrains

phpstorm > install mcpserver plugins

시작중...

[kevinquillen]

Same. I have tried several ways, but the error I get in PHPStorm is always: "Element class kotlinx.serialization.json.JsonArray is not a JsonObject". Meanwhile, it works from command line.

[Salomon88]

@kevinquillen @eondcom I just tried to reproduce this issue, but the MCP plugin works fine in PhpStorm with the Claude agent for me. Can you follow the next steps and report back to me with the results?

1. Add following settings to claude_desktop_config.json (claude app should be closed now)

{

  "mcp": {
    "servers": {
      "jetbrains": {
        "command": "npx",
        "args": [
          "-y",
          "@jetbrains/mcp-proxy"
        ]
      }
    }
  },
  "mcpServers": {
    "jetbrains": {
      "command": "npx",
      "args": [
        "-y",
        "@jetbrains/mcp-proxy"
      ]
    }
  }
}

2. If it is possible update PhpStorm to latest stable version
3. Reinstall plugin and restart PhpStorm
4. Disable connection in ai assistant settings like on screenshot

5. Start claude app 6. Try to ask smth in claude. For example `Show current file in jetbrains`

If the issue remains, turn on debug logging as explained in the article and please attach them to this issue

[kevinquillen]

I am trying to add a MCP connection from PHPStorm to Atlassian though - not Claude Desktop. Alternatively, how would I create an MCP server here that points to Atlassian? It just spins and spins and winds up as 'not started'.

[Salomon88]

@kevinquillen I think I understand your issue. This plugin is required when the IDE acts as a server. In your case, however, the IDE is acting as a client, and you're using a different AI Assistant feature that isn't related to this plugin. Could you send a screenshot of your settings?

[kevinquillen]

Its similar to the above, except:

{
  "mcpServers": {
    "atlassian": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote@latest",
        "https://mcp.atlassian.com/v1/sse"
      ]
    }
  }

From the CLI, the npx command works. From the MCP section in PHPStorm (or RustRover etc), it fails with the Kotlin error above. This makes the AI Assistant plugin unable to query Jira.

[Salomon88]

@kevinquillen Please can you attach the full log where error Element class kotlinx.serialization.json.JsonArray is not a JsonObject occurred?
I will file a bug on ai assistant team. Logs you can find in

[Salomon88]

@eondcom Yours issue is in progress and planned to fix in the next stable release