Add your domain to the
Cowork allowlist (mandatory first step)

This is the #1 cause of “plugin won’t connect” errors. Do it first, before anything else.

Cowork sandboxes outbound network calls to a small allowlist. Until your WordPress domain is on that list, every call from the WordPress for Cowork plugin returns blocked-by-allowlist and Claude tells you it can’t reach your site.

Steps

1. Open Claude Desktop on your computer.
2. Click Settings → Cowork → Network → Allowed Domains.
3. Add your WordPress site’s domain. Just the domain — no https://, no path, no trailing slash. Example: yourdomain.com.
4. Fully close and reopen Claude Desktop. The allowlist is cached at session start, so changes don’t take effect mid-session. Quitting from the menu bar / system tray is not enough on some systems — if a restart of Claude Desktop doesn’t help, reboot.

Multiple sites?

Add each WordPress domain you want to manage from Cowork. There’s no per-domain charge — the allowlist is just network plumbing on the Cowork side.

How to confirm it worked

After restarting Claude Desktop, run /wp-status in Cowork. If it returns “Connected as <your-username>”, the allowlist is set correctly. If it still says blocked-by-allowlist, you missed the restart.