Source checked: 2026-07-24 Official source: https://docs.windsurf.com/windsurf/cascade/mcp
Use the complete Secure server address shown by Core during onboarding, including ?setup_attempt=.... Outside onboarding, use https://core.gradien.ai/mcp/continuity.
Add Core
- Open Cascade.
- Select the MCPs icon in the top-right corner, or open Windsurf Settings, Cascade, MCP Servers.
- Choose Add custom MCP server.
- Enter
Coreand paste the complete Core address. - Save, then approve Core in the browser.
- Refresh the MCP list or restart Windsurf if the tools do not appear.
For manual configuration, preserve existing servers in ~/.codeium/windsurf/mcp_config.json and use Windsurf's remote serverUrl form:
{
"mcpServers": {
"core": {
"serverUrl": "<secure-server-address>"
}
}
}
Use Streamable HTTP and OAuth. Do not add a connector key unless the current Windsurf release cannot complete OAuth and the user deliberately chooses that fallback.