Who this is for
Developers who use Windsurf and want Cascade to fetch proxy URLs and account details.
What you need
- An IPMusk account with a verified email address.
- An IPMusk API key. Create it in Settings → API keys (/app/settings/api-keys). For typical use tick read and connect. Add support only if the assistant should open tickets, and order only if it should create orders that end in a payment link.
- The key in an environment variable named IPMUSK_API_KEY, for example export IPMUSK_API_KEY="ipm_live_YOUR_KEY" in your shell profile. The examples below read it from there.
- On Windsurf Teams or Enterprise, an admin may need to allow remote MCP servers.
Set it up
In Cascade, click the MCPs icon, then Configure. This opens ~/.codeium/windsurf/mcp_config.json. Add the server.
- Windsurf uses serverUrl, not url, for remote servers.
- Save the file, then click Refresh in the MCPs panel.
{
"mcpServers": {
"ipmusk": {
"serverUrl": "https://ipmusk.com/mcp",
"headers": {
"Authorization": "Bearer ${env:IPMUSK_API_KEY}"
}
}
}
}Check it works
Open the MCPs panel in Cascade. ipmusk should be listed with its tools.
Ask the assistant: Which IPMusk account am I connected as? It should call get_account and answer with your email address.
Try these prompts
- How much IPMusk residential traffic do I have left?
- Get a sticky US proxy URL for 10 minutes and use it in this script.
- List my IPMusk Static ISP proxies and when they expire.
If it fails
- 401 authentication_required: the key is missing, wrong, revoked or expired. Check that IPMUSK_API_KEY is set where the client starts. echo ${#IPMUSK_API_KEY} prints its length without showing the key.
- The server is greyed out: your team admin has not allowed remote MCP servers.
- 403 forbidden on one tool: the key lacks that tool's scope, or your email is not verified. Scopes cannot be added to a key, so create a new key with the scope and swap it in.
- 429 rate_limited: too many calls in one minute (read 60, connect 20, support 30, order 10). Wait a minute and try again.
- Nothing changed after editing: click Refresh, or restart Windsurf.
Remove access
- Revoke the key in Settings → API keys (/app/settings/api-keys). It stops working at once.
- Then delete the ipmusk entry from mcp_config.json and click Refresh.