CEQUENS Email API: Inbox placement you can rely on

All conversational channels



Email delivery that reaches inboxes, not spam folders

Send transactional emails and marketing campaigns with 99%+ deliverability. Direct ISP relationships, dedicated IPs, and enterprise infrastructure - integrated in 15 minutes.

Inbox placement that works

99%+ deliverability through direct ISP partnerships, dedicated IPs, and advanced authentication (SPF, DKIM, DMARC).

Hasan Karisik (1600 x 1200 px) (27)

One platform, every channel

Combine email with SMS, WhatsApp, and Voice. One integration, one dashboard, one support team.

Hasan Karisik (1600 x 1200 px) (28)

Built for scale

From thousands to millions daily. Real-time tracking, detailed analytics, webhook notifications included.

Pay as (17)

Integration in minutes

SDKs in 8+ languages, comprehensive documentation, and copy-paste code samples. Start sending in 15 minutes.

Pay as (18)

Complete email infrastructure that scales with you

email

Email Management

Build and send emails your way

Template management with dynamic personalization

Scheduled sending and batch processing

HTML/plain text formatting

List management and segmentation

email 2

Delivery Intelligence

Track performance in real-time

Real-time delivery status tracking

Open and click tracking

Bounce classification and suppression lists

Detailed analytics and reporting

Hasan Karisik (1600 x 1200 px) (11)

Enterprise Security

Protection and compliance built-in

End-to-end encryption

SPF, DKIM, DMARC authentication

Dedicated IP addresses

ISO 27001 and PCI DSS certified

Hasan Karisik (1600 x 1200 px) (8)

Developer Tools

Integrate fast, code less

RESTful API with comprehensive docs

SDKs in Python, PHP, Java, Node.js

Webhook notifications

Sandbox environment for testing

0%

Inbox placement rate

< 0 sec

Average delivery time

0%

Platform uptime

0 min

Average integration time

Built for every email use case

Transactional Emails

Send order confirmations, password resets, and account notifications with sub-second delivery.

Untitled design (19)

Marketing Campaigns

Launch segmented campaigns with template management, scheduled sending, and A/B testing.

Untitled design (17)

Customer Onboarding

Automate welcome sequences, verification emails, and educational drip campaigns.

Untitled design (13)

Critical Alerts

Deliver security alerts, payment confirmations, and system notifications that arrive instantly.

Untitled design (15)-1
For Developers

CEQUENS Email API: Integrate the way that works for you

RESTful API:
Simple HTTP/JSON integration with any development stack.

SMTP Relay:
Drop-in replacement with minimal configuration.

Native SDKs:
Pre-built libraries in 8+ languages for faster development.

Visual Workflow Builder:
No-code email sequences combined with SMS, WhatsApp, and chatbots.

Explore our API
Javascript
Ruby
PHP
Pyton
C#
Java
Go
                        const options = {
  method: 'POST',
  headers: {accept: 'application/json', 'content-type': 'application/json'},
  body: JSON.stringify({senderName: 'Cequens', messageType: 'text', shortURL: false})
};

fetch('https://apis.cequens.com/sms/v1/messages', options)
  .then(response => response.json())
  .then(response => console.log(response))
  .catch(err => console.error(err));
                
                        require 'uri'
require 'net/http'

url = URI("https://apis.cequens.com/sms/v1/messages")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["accept"] = 'application/json'
request["content-type"] = 'application/json'
request.body = "{\"senderName\":\"Cequens\",\"messageType\":\"text\",\"shortURL\":false}"

response = http.request(request)
puts response.read_body
                
                        request('POST', 'https://apis.cequens.com/sms/v1/messages', [
  'body' => '{"senderName":"Cequens","messageType":"text","shortURL":false}',
  'headers' => [
    'accept' => 'application/json',
    'content-type' => 'application/json',
  ],
]);

echo $response->getBody();
                
                        import requests

url = "https://apis.cequens.com/sms/v1/messages"

payload = {
    "senderName": "Cequens",
    "messageType": "text",
    "shortURL": False
}
headers = {
    "accept": "application/json",
    "content-type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)
                
                        using RestSharp;


var options = new RestClientOptions("https://apis.cequens.com/sms/v1/messages");
var client = new RestClient(options);
var request = new RestRequest("");
request.AddHeader("accept", "application/json");
request.AddJsonBody("{\"senderName\":\"Cequens\",\"messageType\":\"text\",\"shortURL\":false}", false);
var response = await client.PostAsync(request);

Console.WriteLine("{0}", response.Content);

                
                        OkHttpClient client = new OkHttpClient();

MediaType mediaType = MediaType.parse("application/json");
RequestBody body = RequestBody.create(mediaType, "{\"senderName\":\"Cequens\",\"messageType\":\"text\",\"shortURL\":false}");
Request request = new Request.Builder()
  .url("https://apis.cequens.com/sms/v1/messages")
  .post(body)
  .addHeader("accept", "application/json")
  .addHeader("content-type", "application/json")
  .build();

Response response = client.newCall(request).execute();
                
                        package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://apis.cequens.com/sms/v1/messages"

	payload := strings.NewReader("{\"senderName\":\"Cequens\",\"messageType\":\"text\",\"shortURL\":false}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("accept", "application/json")
	req.Header.Add("content-type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}
                

One platform. All your communication needs.

Why manage multiple vendors? Combine Email, SMS, WhatsApp, Voice, and AI chatbots through one integration.

One Platform

Single integration for email, SMS, WhatsApp, Voice, and chatbots. Track every interaction across all channels in one unified dashboard.

One Team

24/7 technical support across your entire communication stack. No vendor finger-pointing - just fast, knowledgeable assistance.

One Bill

Consolidated billing with volume discounts across all channels. Simpler procurement, clearer budgeting, better pricing.

Ready to improve your email deliverability?

1
phone-book@2x

Sign Up

Create your account and get instant API credentials.

2
gear@2x

Integrate

Use our SDKs and documentation to integrate in minutes.

3
email@3x

Start Sending

Deploy to production with enterprise support backing you.

Book a Demo

Discover how our solutions have transformed businesses and facilitated seamless connections

Koinz

“ We are tech-based startup in the food industry, and are always looking for partnerships that can provide us with the needed agility, dependability, and quality of service that helps us grow in an extremely competitive and demanding market. Working with CEQUENS has been super fulfilling and rewarding for us.”

Muhammed Sayed.

Muhammed Sayed

Marketing Manager

Decathlon

“ As a communication-driven team in Decathlon, our mission is to spread our message to communities. By utilizing CEQUENS's SMS API solutions, we were able to connect with existing customers and onboard new customers rapidly and efficiently, inviting them to be part of the Decathlon experience with one click.”

Carole Nady.

Carole Nady

Head - Digital Marketing

Madar

“ Through CEQUENS’s solutions we were able to engage with our customers across their channel of preference, providing them with a convenient and reliable suite of solutions to deal with queries, pricing, delivery, and complaints. We look forward to working on more marketing strategies with their solutions.”

Ayman Shamout.

Ayman Shamout

CEO

Frequently asked questions

Discover FAQs for SMS API: Get answers on services, features, pricing, and more. Our FAQ section clarifies common queries. For extra help, contact our support team.

Most developers complete integration within 15-30 minutes using our SDKs and documentation. Our technical support team is available 24/7 to assist.

Yes. We support custom domains with full authentication setup (SPF, DKIM, DMARC) to maintain your brand identity and maximize deliverability.

We maintain industry-leading deliverability rates above 99% through direct ISP relationships, dedicated IPs, and advanced reputation management.

Pay-as-you-go pricing based on email volume with discounts for higher tiers. Enterprise plans include dedicated resources and custom SLAs.

Yes. Our SMTP relay works as a drop-in replacement for your existing email infrastructure with minimal configuration changes.

CEQUENS Email API infrastructure is ISO 27001 and PCI DSS certified, with GDPR compliance and regional data residency options.

Yes. Real-time open tracking, click tracking, and detailed analytics are included with all plans.