AWS Cognito MCP Server

Implementation Reference

• index.ts:795-846 (handler)

  The handler function for the 'resend_confirmation_code' tool. It creates a CognitoUser instance for the given username and calls resendConfirmationCode to send a new confirmation code via email or other delivery method.

      async ({ username }) => {
          return new Promise((resolve, reject) => {
              const cognitoUser = new CognitoUser({
                  Username: username,
                  Pool: userPool
              });
  
              cognitoUser.resendConfirmationCode((err, result) => {
                  if (err) {
                      reject({
                          content: [
                              {
                                  type: "text" as const,
                                  text: `Failed to resend confirmation code: ${err.message}`,
                              },
                              {
                                  type: "text" as const,
                                  text: `Error code: ${(err as any).code || 'Unknown'}`,
                              }
                          ]
                      });
                      return;
                  }
  
                  resolve({
                      content: [
                          {
                              type: "text" as const,
                              text: "Confirmation code resent successfully",
                          },
                          {
                              type: "text" as const,
                              text: `Username: ${username}`,
                          },
                          {
                              type: "text" as const,
                              text: `Delivery method: ${result?.CodeDeliveryDetails?.DeliveryMedium || 'Unknown'}`,
                          },
                          {
                              type: "text" as const,
                              text: `Destination: ${result?.CodeDeliveryDetails?.Destination || 'Unknown'}`,
                          },
                          {
                              type: "text" as const,
                              text: `Time: ${new Date().toISOString()}`,
                          }
                      ]
                  });
              });
          });
      }
  )

• index.ts:792-794 (schema)

  Zod schema for input validation, requiring a 'username' string.

  {
      username: z.string()
  },

• index.ts:790-791 (registration)

  Registration of the tool with MCP server using server.tool(), specifying name, schema, and handler.

  server.tool(
      "resend_confirmation_code",