Consistent error with a missing "content" array

[bmeyer99]

I am able to install just fine however when Cline attempts to utilize the MCP it consistently receives the following response, no matter which tool is attempted.

Error Error executing MCP tool: [ { "code": "invalid_type", "expected": "array", "received": "undefined", "path": [ "content" ], "message": "Required" } ]

[raayraay69]

Ya mine is saying:

Error executing MCP tool: [ { "code": "invalid_type", "expected": "array", "received": "undefined", "path": [ "content" ], "message": "Required" } ]

[slgray]

same error here.

[jmanhype]

same here it might not work guys

[simpl1g]

Not working for me in Cline, however it works fine via insector https://mcp.so/server/inspector, probably it can be a problem in Cline itself

[egoist]

it also doesn't work with the official js sdk, the returned result is {result: {toolResult:{content: []}}}, but the required format is {content}

[juzarantri]

@bmeyer99 @raayraay69 did you guys managed to resolve the issue?

[JeffParkes]

I too am getting this using Roo Code (formerly Roo Cline):

Error executing MCP tool:
[
  {
    "code": "invalid_type",
    "expected": "array",
    "received": "undefined",
    "path": [
      "content"
    ],
    "message": "Required"
  }
]

Seems the request is malformed because RooCode is able to CURL the endpoint with the same token provided in the MCP server settings and get responses for things like zone_list and also make changes

[cmsparks]

This is relevant to the local stdio based server. We are now maintaining the remote MCP server, which shouldn't have this issue.