AWS Cognito MCP Server

Implementation Reference

• index.ts:123-158 (handler)

  The handler function retrieves the current Cognito user, signs them out using cognitoUser.signOut(), and returns success or no-user messages with details.

  async ({ }) => {
      const cognitoUser = userPool.getCurrentUser();
      if (cognitoUser) {
          const username = cognitoUser.getUsername();
          cognitoUser.signOut();
          return {
              content: [
                  {
                      type: "text" as const,
                      text: "Signed out successfully",
                  },
                  {
                      type: "text" as const,
                      text: `Username: ${username}`,
                  },
                  {
                      type: "text" as const,
                      text: `Time: ${new Date().toISOString()}`,
                  },
                  {
                      type: "text" as const,
                      text: "All tokens have been invalidated",
                  }
              ]
          };
      } else {
          return {
              content: [
                  {
                      type: "text" as const,
                      text: "No user was signed in",
                  }
              ]
          };
      }
  }

• index.ts:121-122 (schema)

  Input schema for the sign_out tool: empty object, indicating no input parameters are required.

  {
  },

• index.ts:119-159 (registration)

  Full registration of the sign_out tool via server.tool(), specifying the name, empty input schema, and inline handler function.

  server.tool(
      "sign_out",
      {
      },
      async ({ }) => {
          const cognitoUser = userPool.getCurrentUser();
          if (cognitoUser) {
              const username = cognitoUser.getUsername();
              cognitoUser.signOut();
              return {
                  content: [
                      {
                          type: "text" as const,
                          text: "Signed out successfully",
                      },
                      {
                          type: "text" as const,
                          text: `Username: ${username}`,
                      },
                      {
                          type: "text" as const,
                          text: `Time: ${new Date().toISOString()}`,
                      },
                      {
                          type: "text" as const,
                          text: "All tokens have been invalidated",
                      }
                  ]
              };
          } else {
              return {
                  content: [
                      {
                          type: "text" as const,
                          text: "No user was signed in",
                      }
                  ]
              };
          }
      }
  )