MCP server - Connect button

Support Bug Reports
1

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

Cursor plugins does not load anymore, connect button won’t appear even after cursor reload windows/restart, laptop restart. Looks like an issue with oauth, colleagues don’t have the issue so this is something conflicting on my computer.

2026-04-06 17:28:47.193 [info] [V2] Handling CreateClient action
2026-04-06 17:28:47.193 [info] [V2 FSM] connection:connect_start: conn=idle,auth=unknown → conn=connecting,auth=unknown
2026-04-06 17:29:05.260 [info] [V2] Handling ReloadClient action
2026-04-06 17:29:05.261 [info] [V2 FSM] connection:connect_start: conn=idle,auth=unknown → conn=connecting,auth=unknown
2026-04-06 17:29:08.284 [info] Using redirect URL
2026-04-06 17:29:09.283 [info] Using redirect URL
2026-04-06 17:29:09.283 [info] Using redirect URL
2026-04-06 17:29:10.275 [info] Saving PKCE code verifier
2026-04-06 17:29:15.309 [error] Failed to reload client: Aborted Aborted
2026-04-06 17:29:20.306 [info] MCP OAuth redirect to authorization
2026-04-06 17:29:32.345 [info] Stored server URL for OAuth flow
2026-04-06 17:29:32.345 [info] OAuth provider needs auth callback during connection
2026-04-06 17:29:32.346 [info] Connect failed after auth_required; returning needsAuth (streamableHttp)
2026-04-06 17:31:45.767 [info] [V2] Handling DeleteClient action, reason: config_server_removed
2026-04-06 17:31:46.805 [info] [V2] Handling LogoutServer action
2026-04-06 17:31:46.806 [info] Clearing stored OAuth data
2026-04-06 17:31:51.779 [info] [V2] Handling CreateClient action
2026-04-06 17:31:51.780 [info] [V2 FSM] connection:connect_start: conn=idle,auth=unknown → conn=connecting,auth=unknown
2026-04-06 17:32:50.974 [info] Successfully cleared OAuth tokens
2026-04-06 17:32:50.974 [info] [V2] Removing client, reason: logout_server

Steps to Reproduce

wont reproduce

Expected Behavior

The connect button should appear to authenticate in MintMCP

Screenshots / Screen Recordings

Screenshot 2026-04-06 at 5.40.15 PM.png
Screenshot 2026-04-06 at 5.40.15 PM.png1280×2070 457 KB

Operating System

MacOS

Version Information

latest version

Does this stop you from using Cursor

No - Cursor works, but with this issue

4

Hi @julien-alpaca Thanks for reporting. As a first troubleshooting step can you try disabling the plugin, re-enabling, and then going through the authentication flow and logging in? Let me know if that doesn’t solve it and we’ll go through some next steps!

7

Hi

Have the same issue, don’t have connect button for mcp with oauth

8

Which MCP server? If you toggle it off and then back on, do you see the Connect Button again?

9

same issue

disable/enable not work

uninstall/install not work

uninstall cursor, delete ~/.cursor, install cursor not work

10

Hi @ConnorLH Just circling back here, do you still see this issue in the latest Cursor version after updating?

11

The error stills persist, trying to connect to dart mcp:

Available commands:

analyze Analyze Dart code in a directory.

compile Compile Dart to various formats.

create Create a new Dart project.

devtools Open DevTools (optionally connecting to an existing application).

doc Generate API documentation for Dart projects.

fix Apply automated fixes to Dart source code.

format Idiomatically format Dart source code.

info Show diagnostic information about the installed tooling.

pub Work with packages.

run Run a Dart program.

test Run tests for a project.

Run “dart help ” for more information about a command.

See dart: The Dart command-line tool for detailed documentation.

undefined

2026-05-23 12:20:08.218 [warning] Connection failed: MCP error -32000: Connection closed

2026-05-23 12:20:08.218 [warning] [V2 FSM] connection:connect_failure: conn=connecting,auth=unknown → conn=failed,auth=unknown

2026-05-23 12:20:08.218 [info] CreateClient completed, connected: false, statusType: error

2026-05-23 12:25:03.058 [info] [V2] Handling DeleteClient action, reason: server_disabled

2026-05-23 12:25:03.377 [info] [V2] Handling CreateClient action

2026-05-23 12:25:03.377 [info] [V2 FSM] connection:connect_start: conn=idle,auth=unknown → conn=connecting,auth=unknown

2026-05-23 12:25:03.747 [error] Could not find a command named “mcp-server”.

Usage: dart <command|dart-file> [arguments]

Global options:

-v, --verbose Show additional command output.

--version               Print the Dart SDK version.

--enable-analytics      Enable analytics.

--disable-analytics     Disable analytics.

--suppress-analytics    Disallow analytics for this \`dart \*\` run without changing the analytics configuration.

-h, --help Print this usage information.

Available commands:

analyze Analyze Dart code in a directory.

compile Compile Dart to various formats.

create Create a new Dart project.

devtools Open DevTools (optionally connecting to an existing application).

doc Generate API documentation for Dart projects.

fix Apply automated fixes to Dart source code.

format Idiomatically format Dart source code.

info Show diagnostic information about the installed tooling.

pub Work with packages.

run Run a Dart program.

test Run tests for a project.

Run “dart help ” for more information about a command.

See dart: The Dart command-line tool for detailed documentation.

undefined

2026-05-23 12:25:03.772 [warning] Connection failed: MCP error -32000: Connection closed

2026-05-23 12:25:03.772 [warning] [V2 FSM] connection:connect_failure: conn=connecting,auth=unknown → conn=failed,auth=unknown

2026-05-23 12:25:03.772 [info] CreateClient completed, connected: false, statusType: error

12

Hi @Carlos_Eduardo1 Thanks for the logs. The key error is:

Could not find a command named "mcp-server"

This means Cursor is launching dart, but the Dart SDK being used does not include the MCP server command yet. Please update Dart/Flutter to the latest stable version, then restart Cursor and try reconnecting the MCP server.

It’s also worth checking that Cursor is using the same Dart install you updated. You can verify with:

dart --version
which dart
dart mcp-server

If dart mcp-server still fails in the terminal after updating, the SDK on your PATH is still too old or not the expected install.