Notion MCP Server

Implementation Reference

• src/lib/mcp-server.ts:597-628 (registration)

  Registration of the 'get-user' MCP tool, including inline Zod input schema and the handler function that delegates to NotionService.retrieveUser(user_id) and formats the JSON response or error.

  this.server.tool(
    "get-user",
    {
      user_id: z.string().describe("The ID of the user to retrieve"),
    },
    async ({ user_id }) => {
      try {
        const result = await this.notionService.retrieveUser(user_id);
        return {
          content: [
            {
              type: "text",
              text: JSON.stringify(result, null, 2),
            },
          ],
        };
      } catch (error) {
        console.error("Error in get-user tool:", error);
        return {
          content: [
            {
              type: "text",
              text: `Error: Failed to retrieve Notion user - ${
                (error as Error).message
              }`,
            },
          ],
          isError: true,
        };
      }
    }
  );

• src/lib/notion.ts:292-300 (helper)

  The NotionService.retrieveUser method, which implements the core logic by calling the Notion SDK's client.users.retrieve with the provided user_id.

  async retrieveUser(userId: string) {
    try {
      return await this.client.users.retrieve({
        user_id: userId,
      });
    } catch (error) {
      this.handleError(error);
    }
  }