#authentication
2 articles
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Sign in to a remote MCP server in Claude Code: /mcp and claude mcp login
Add a remote server with claude mcp add --transport http, then sign in from /mcp or with claude mcp login. Covers fixed callback ports, pre-registered client IDs and re-auth.
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history.persistence = "none" stops Codex writing chat history; keyring keeps credentials off disk
Two lines in ~/.codex/config.toml: history.persistence = "none" (default save-all) and cli_auth_credentials_store = "keyring" or "ephemeral". What each disables and the trade-offs.