[BUG] Claude Desktop: Cannot remove LOCAL DEV MCP connectors — server rejects legacy -1p-internal IDs

Note: This is a Claude Desktop issue, not Claude Code. Filing here as there is no public issue tracker for Claude Desktop.

Bug Description

LOCAL DEV MCP connectors with legacy -1p-internal IDs (gcal-1p-internal, gdrive-1p-internal, gmail-1p-internal) cannot be removed from Claude Desktop. The server-side /mcp/logout/ endpoint rejects these IDs with a validation error.

Steps to Reproduce

1. Open Claude Desktop → Settings → Connectors
2. Scroll to the LOCAL DEV section where gcal, gdrive, gmail entries appear
3. Click Configure on any entry (e.g., gcal)
4. Click Uninstall → Confirm "Disconnect"
5. Two red error banners appear:

• **"Invalid server ID format. Expected UUID or mcpsrv_ tagged ID."*
• "Failed to disconnect from server"

Error Details (from DevTools Console)

Failing API call:

POST https://claude.ai/api/organizations/{org_id}/mcp/logout/gcal-1p-internal → 400 (Bad Request)

Server response:

{
  "type": "error",
  "error": {
    "type": "invalid_request_error",
    "message": "Invalid server ID format. Expected UUID or mcpsrv_* tagged ID.",
    "details": {
      "error_visibility": "user_facing",
      "error_code": "invalid_server_id"
    }
  },
  "request_id": "req_011CXVsj13SWTz4S1cBzua1N"
}

Additional console error (separate issue):

Error invoking remote method 'isStartupOnLoginEnabled': Result from method "isStartupOnLoginEnabled" in interface "Startup" failed to pass validation

Root Cause Analysis

The connectors were originally created with -1p-internal suffixed IDs (e.g., gcal-1p-internal). The server's /mcp/logout/ endpoint now validates that IDs must be UUIDs or mcpsrv_* tagged format. The legacy -1p-internal IDs fail this validation, making these connectors permanently stuck — they cannot be deleted through the UI.

Troubleshooting Already Attempted

All of the following were performed with Claude Desktop fully quit. None resolved the issue:

1. Verified claude_desktop_config.json is empty ({})
2. Deleted Local Storage (LevelDB), Session Storage
3. Full Electron cache/storage wipe: Cache, Code Cache, GPUCache, DawnGraphiteCache, blob_storage, WebStorage, Cookies, Preferences, DIPS, SharedStorage, Network Persistent State, TransportSecurity, Trust Tokens
4. Cleared ~/Library/Caches/com.anthropic.claudefordesktop/

Result: Entries persist after all local data is cleared, confirming they are stored server-side.

Expected Behavior

Clicking Uninstall/Disconnect should successfully remove the LOCAL DEV connector entries.

Actual Behavior

Removal fails with "Invalid server ID format" error. Entries remain permanently and cannot be removed.

Environment

• Claude Desktop version: 1.1.886
• OS: macOS 26.2 (Build 25C56)
• Architecture: Apple Silicon (arm64)

Suggested Fix

The /mcp/logout/ endpoint's ID validation should accept the same formats that were used to create these connectors, including the legacy -1p-internal format. Alternatively, a migration should convert these IDs to the new format.