Supabase•3mo ago

mcp with claude code

Hi guys , im following the supabase docs for getting the mcp installed in claude code https://supabase.com/docs/guides/getting-started/mcp?queryGroups=os&os=wsl#claude-code but i keep getting the error [ERROR] MCP server "supabase" Connection failed: spawn wsl ENOENT im using WSL ubuntu to use claude code node version -18.19.1 npx version 9.2.0 and this is how my .mcp.json file looks like

{
  "mcpServers": {
    "supabase": {
      "command": "wsl",
      "args": [
        "npx",
        "-y",
        "@supabase/mcp-server-supabase@latest",
        "--access-token",
        "123faketoken"
      ]
    }
  }
}

{
  "mcpServers": {
    "supabase": {
      "command": "wsl",
      "args": [
        "npx",
        "-y",
        "@supabase/mcp-server-supabase@latest",
        "--access-token",
        "123faketoken"
      ]
    }
  }
}

32 Replies

inder•3mo ago

~~A solution mentioned in this github discussion is to remove @latest from the end. Simply @supabase/mcp-server-supabase~~ This is a different error

I goon to clippyOP•3mo ago

I’ll give it a try just one more question. I’m running Claude code using WSL with ubuntu when trying to set up the MCP should I keep the command as WSL? A Linux base system before so I’m unsure how this would work thanks

inder•3mo ago

Not completely sure but I think if you're running from within wsl ubuntu, then you can simply write it this way.

{
  "mcpServers": {
    "supabase": {
      "command": "npx",
      "args": [
        "-y",
        "@supabase/mcp-server-supabase@latest",
        "--access-token",
        "123faketoken"
      ]
    }
  }
}

{
  "mcpServers": {
    "supabase": {
      "command": "npx",
      "args": [
        "-y",
        "@supabase/mcp-server-supabase@latest",
        "--access-token",
        "123faketoken"
      ]
    }
  }
}

I goon to clippyOP•3mo ago

holy, this worked so it was just bad command

I goon to clippyOP•3mo ago

i didnt get an error this time

inder•3mo ago

Yes, the first one will work if you run from windows

I goon to clippyOP•3mo ago

thank you for your help ❤️

ShubhamSingh047•2mo ago

Guys i am able to connect to superbase but when i am asking claude to do somathing its saying could not access giving error:- Error: {"error":{"name":"Error","message":"Unauthorized. Please provide a valid access token to the MCP server via the --access-token flag or SUPABASE_ACCESS_TOKEN."}} but i am prety much sure i am giving a valid token ??

inder•2mo ago

Can you use supabase cli with the token you have right now?

ShubhamSingh047•2mo ago

i have not actully install superbase locally when i am trying to do so i am getting :- npm WARN deprecated node-domexception@1.0.0: Use your platform's native DOMException instead npm ERR! code 1 npm ERR! path /Users/shubhamsingh/.npm-global/lib/node_modules/supabase npm ERR! command failed npm ERR! command sh -c node scripts/postinstall.js npm ERR! node:internal/process/esm_loader:34 npm ERR! internalBinding('errors').triggerUncaughtException( npm ERR! ^ npm ERR! Installing Supabase CLI as a global module is not supported. npm ERR! Please use one of the supported package managers: https://github.com/supabase/cli#install-the-cli npm ERR! npm ERR! (Use node --trace-uncaught ... to show where the exception was thrown) npm ERR! npm ERR! Node.js v20.11.1 npm ERR! A complete log of this run can be found in: /Users/shubhamsingh/.npm/_logs/2025-07-05T18_40_25_619Z-debug-0.log ~/Des/plans2pick_be_lates   1 ✘ 5s 12:10:27 AM @inder

inder•2mo ago

Are you sure access token is being passed to mcp server?

ShubhamSingh047•2mo ago

actully its working on my local and showing list of projects as well but with mcp i am not sure what is the issue ! i have copied the secreate key and pasted as well can we connect ?? @inder

inder•2mo ago

Sorry I can't, you can post your queries here secret key or access token? there is a difference between the two

ShubhamSingh047•2mo ago

sorry i mean access token !

ShubhamSingh047•2mo ago

from here

ShubhamSingh047•2mo ago

i think the location .mcp.json should be diffent but in officail doc its was suggested to keep in root of the project !

inder•2mo ago

Maybe try this https://docs.anthropic.com/en/docs/claude-code/mcp#project-scope

ShubhamSingh047•2mo ago

already added my calude is not able to access the mcp access token !

ShubhamSingh047•2mo ago

for mac is the set up any differnt ?? i have done the set up for figma mcp as well never felt any issue !

inder•2mo ago

I don't think there would be any difference between the setup. Its just running a command with some args. Try running claude with --debug flag. Maybe there is something in there

ShubhamSingh047•2mo ago

i dont know its routing again to this issue Now let me test the connection: ⎿ Error: {"error":{"name":"Error","message":"Unauthorized. Please provide a valid access token to the MCP server via the --access-token flag or SUPABASE_ACCESS_TOKEN."}} tried using env varible as well no help using cli a access token create automatically in my superbase cli_shubhamsingh@Shubhams-MacBook-Air-2.local_1751741057

inder•2mo ago

I didn't understand

ShubhamSingh047•2mo ago

when i run ❯ npx supabase bootstrap in my cli i saw a entry created in my access tokens

inder•2mo ago

Have you tried using cursor? supabase mcp with cursor

ShubhamSingh047•2mo ago

nope i use claude may there might be an issue with claude only

inder•2mo ago

Yes, that's what I was thinking. Trying with some other AI will confirm that. I think vscode too now supports mcp

I goon to clippyOP•2mo ago

@ShubhamSingh047 can you run me the steps that you did to connect the mcp Im using claude code and was able to set it up pretty easily so i might be able to help

cazza•2mo ago

I have tried for hours to get the MCP working in Claude Code, only now to find this thread! I was super hopeful this different way of writing the mcp server would work but it hasn't.... any further ideas? This is a windows (not wsl) terminal.

I goon to clippyOP•2mo ago

You need to run it in the same terminal space as Claude code, so you wouldn't be able to use windows here 😦

I goon to clippyOP•2mo ago

just follow the same steps as you would in the guide https://supabase.com/docs/guides/getting-started/mcp#claude-code

Model context protocol (MCP) | Supabase Docs

Connect your AI tools to Supabase using MCP

I goon to clippyOP•2mo ago

but change the command to match the one above. and it should work

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