Shopify CLI App Commands failing

Extensions
1

commands like “app dev”, “app config link“ are failing . Giving 500 Internal Server Error.

– The App Management GraphQL API responded unsuccessfully with the HTTP status 500 and.
– Partner app dev dashboard isn’t accessible

CleanShot 2026-01-07 at 12.51.05
CleanShot 2026-01-07 at 12.51.051563×899 101 KB

2

Hi @Mujtaba_Rafid_Rumi - Can you share:

  1. Your CLI version (shopify version)

  2. The full CLI error output including the Request ID

  3. What type of app/ app extension you’re building

Those details will allow me to take a look in our legs and see what the root cause might be - thanks!

3

– Shopify Version: shopify/cli/3.84.1
– Full CLI error output :

The App Management GraphQL API responded unsuccessfully with the HTTP status 500 and errors:               │
│                                                                                                             │
│  "Internal Server Error"                                                                                    │
│                                                                                                             │
│  Request ID: 0cdd466f-45ec-4a3f-932b-0278821efe46-1767776863

App Extension : Theme APP Extension

4

I pulled the logs for the request ID you shared and found a possible cause - the CLI can’t find a valid extension specification for an extension type called “mcp”.

It looks like your app has an extension referencing “mcp” somewhere in your configuration, but that’s not a valid extension type. The CLI is trying to process it and failing because there’s no specification registered for it.

Check your extensions/ directory for any TOML files that have something like type = "mcp". You’ll need to either remove that extension or change it to a valid extension type like ui_extension, function, flow_action, etc.

If you were trying to build something MCP-related, you’d be looking at the Storefront MCP server or Dev MCP server docs instead, which don’t use the extension system.

If you’re still stuck, can you share the contents of your shopify.extension.toml file(s) from your extensions/ directory? Feel free to redact any sensitive info - I’m mainly looking at the extension type and handle values to confirm what’s going on.