Describe the Bug
I’m experiencing an issue where Cursor is listening on port 8545, which conflicts with my testing setup and disrupts my workflow. Even when I start Cursor with --disable-extensions, it still occupies the port:
❯cursor --disable-extensions
❯ lsof -i :8545
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
reth 26650 igor 29u IPv4 0xa7bd3386efa157e6 0t0 TCP *:8545 (LISTEN)
Cursor 29005 igor 59u IPv4 0xd101beb9f7abd39c 0t0 TCP localhost:8545 (LISTEN)
As you can see, both reth and Cursor are competing for the same port. Any suggestions on how to prevent Cursor from using port 8545?
Steps to Reproduce
Steps to reproduce:
1. Start Cursor with disabled extensions:
c --disable-extensions
2. Check which processes are listening on port 8545:
lsof -i :8545
3. Observe that Cursor is listening on port 8545 alongside other processes (like reth), causing port conflicts during testing.
Operating System
MacOS
Current Cursor Version (Menu → About Cursor → Copy)
Version: 1.2.2
Commit: faa03b17cce93e8a80b7d62d57f5eda6bb6ab9f0
Date: 2025-07-07T06:08:52.104Z (3 days ago)
Browser: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Cursor/1.2.2 Chrome/132.0.6834.210 Electron/34.5.1 Safari/537.36
Does this stop you from using Cursor
No - Cursor works, but with this issue