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Messente public API libraries merged into one C# library
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Messente API Library

  • Messente API version: 1.0.2
  • C# package version: 1.0.2

Messente is a global provider of messaging and user verification services. Use Messente API library to send and receive SMS, Viber and WhatsApp messages, blacklist phone numbers to make sure you're not sending any unwanted messages, manage contacts and groups. Messente builds tools to help organizations connect their services to people anywhere in the world.


Install Messente API library via NuGet Package Manager or .NET CLI.

Package Manager

Install-Package com.Messente.Api -Version 1.0.2


dotnet add package com.Messente.Api --version 1.0.2


Messente API has the following features:

Messente API Library provides the operations described below to access the features.


  1. Adds a phone number to the blacklist AddToBlacklist
  2. Deletes a phone number from the blacklist DeleteFromBlacklist
  3. Returns all blacklisted phone numbers FetchBlacklist
  4. Checks if a phone number is blacklisted IsBlacklisted


  1. Adds a contact to a group AddContactToGroup
  2. Creates a new contact CreateContact
  3. Deletes a contact DeleteContact
  4. Lists a contact FetchContact
  5. Lists groups of a contact FetchContactGroups
  6. Returns all contacts FetchContacts
  7. Removes a contact from a group RemoveContactFromGroup
  8. Updates a contact UpdateContact


  1. Retrieves the delivery report for the Omnimessage RetrieveDeliveryReport


  1. Creates a new group with the provided name CreateGroup
  2. Deletes a group DeleteGroup
  3. Lists a group FetchGroup
  4. Returns all groups FetchGroups
  5. Updates a group with the provided name UpdateGroup


  1. Cancels a scheduled Omnimessage CancelScheduledMessage
  2. Sends an Omnimessage SendOmnimessage


Type: HTTP basic authentication

Read the external getting-started article which explains API keys and Sender ID logic.

Getting started: sending an omnimessage

using System;
using System.Diagnostics;
using System.Collections.Generic;
using com.Messente.Api.Api;
using com.Messente.Api.Client;
using com.Messente.Api.Model;

namespace Example
    public class SendOmniMessageExample
        public static void Main()
            // Configure HTTP basic authorization: basicAuth
            Configuration.Default.Username = "<MESSENTE_API_USERNAME>";
            Configuration.Default.Password = "<MESSENTE_API_PASSWORD>";

            List<object> messages = new List<object>();
            var sms = new SMS(sender: "<sender number or name>", text: "Hello SMS!");
            var viber = new Viber(text: "Hello viber!");
            var whatsapp = new WhatsApp(text: new WhatsAppText(body: "Hello WhatsApp!"));

            var apiInstance = new OmnimessageApi();
            var omnimessage = new Omnimessage(to: "<phone_number>", messages: messages);

                // Sends an Omnimessage
                OmniMessageCreateSuccessResponse result = apiInstance.SendOmnimessage(omnimessage);
            catch (Exception e)
                Debug.Print("Exception when calling SendOmnimessage: " + e.Message);




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