product · inferred from evidence
Notion-Version header
A required header for Notion API requests, specifying the API version.
- AxiosError: Request failed with status code 401 (Notion MCP not sending the Authorization header)
Fixes the Notion MCP server 401ing because it never attaches the Authorization header. Use when the token is valid via curl but the server sends requests without it. Not for misquoted headers or unshared pages.