Lightning-Fast, AI-Powered Email API for Scalable and Reliable Email Delivery

35B+
Emails/Month
3s
Delivery Speed
99%
Inbox Placement Rate
Customer Engagement Platform | Netcore Cloud
Trusted by 6500+ brands |
Recognized by
G2 Leader

G2 Leader in Email API
(2025)

Gartner

Featured in Gartner Voice
of Customer

Forrester

Named in Forrester
Email Wave Report

Google

Premium partner
Google Cloud

Meta

Meta
Partner

Built for Scale. Optimized for Engagement.
Backed by Expert Support.
Blazing-Fast, AI-Driven Email Delivery

Deliver 35 B+ emails monthly with <3s delivery and 95% inbox placement. Let Raman, our homegrown AI engine, optimize your delivery in real-time with Predictive Engagement, Adaptive Throughput and Send-Time Optimization

Advanced Analytics and Real-Time Monitoring

Track every mail stream in real-time with predictive alerts, inbox monitoring, and deep performance insights.

Beyond Delivery: AMP, BIMI, and Email Annotations

Create app-like email experiences, build brand trust, and drive up to 5x engagement - right inside the inbox.

Flexible, Developer-Friendly Integration

Plug and play in minutes with SMTP or RESTful API. Build, send, and scale with complete control and zero friction.

Send at scale with the developer-first email platform

Enterprise-Grade Infrastructure Backed by Google Cloud

Netcore Infrastructure
  • 01 Google Cloud Platform
  • 02 Global Edge Delivery
  • 03 99.99% Uptime SLA
  • 04 Real-time Failover
Built on industry-leading GCP infrastructure for high performance and scalability.
Netcore Integration
RESTful APIs
SMTP Relay
SDKs Available
Easy integration with minimal effort. Plug into your application seamlessly.
Netcore Security
ISO/IEC 27001:2013
SOC 2 Certified
GDPR Compliant
Enterprise-grade security with complete compliance coverage.

Connect with the Tools You Already Use

Netcore Email API fits right into your marketing and development stack. From CRM tools to
ecommerce platforms, integrations are plug-and-play.
Everything Marketer and Developer Needs — and More
Python
import requests
import json

url = "https://emailapi.netcorecloud.net/v5/mail/send"

payload = {
    "from": {
        "email": "[email protected]",
        "name": "Flight confirmation"
    },
    "subject": "Your Barcelona flight e-ticket : BCN2118050657714",
    "content": [
        {
            "type": "html",
            "value": "Hello Lionel, Your flight for Barcelona is confirmed."
        }
    ],
    "personalizations": [
        {
            "to": [
                {
                    "email": "[email protected]",
                    "name": "Lionel Messi"
                }
            ]
        }
    ]
}

headers = {
    "api_key": "",
    "Content-Type": "application/json"
}

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

print(response.status_code)
print(response.text)


            
  curl --request POST \
  --url https://emailapi.netcorecloud.net/v5/mail/send \
  --header 'api_key: ' \
  --header 'Content-Type: application/json' \
  --data '{
    "from": {
      "email": "[email protected]",
      "name": "Flight confirmation"
    },
    "subject": "Your Barcelona flight e-ticket : BCN2118050657714",
    "content": [
      {
        "type": "html",
        "value": "Hello Lionel, Your flight for Barcelona is confirmed."
      }
    ],
    "personalizations": [
      {
        "to": [
          {
            "email": "[email protected]",
            "name": "Lionel Messi"
          }
        ]
      }
    ]
  }'
const https = require('https');

const data = JSON.stringify({
  from: {
    email: '[email protected]',
    name: 'Flight confirmation'
  },
  subject: 'Your Barcelona flight e-ticket : BCN2118050657714',
  content: [
    {
      type: 'html',
      value: 'Hello Lionel, Your flight for Barcelona is confirmed.'
    }
  ],
  personalizations: [
    {
      to: [
        {
          email: '[email protected]',
          name: 'Lionel Messi'
        }
      ]
    }
  ]
});

const options = {
  hostname: 'emailapi.netcorecloud.net',
  path: '/v5/mail/send',
  method: 'POST',
  headers: {
    'api_key': '',
    'Content-Type': 'application/json',
    'Content-Length': data.length
  }
};

const req = https.request(options, (res) => {
  let body = '';

  res.on('data', (chunk) => {
    body += chunk;
  });

  res.on('end', () => {
    console.log('Response:', body);
  });
});

req.on('error', (e) => {
  console.error('Request error:', e);
});

req.write(data);
req.end();
require 'uri'
require 'net/http'
require 'openssl'
require 'json'

url = URI("https://emailapi.netcorecloud.net/v5/mail/send")

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

request = Net::HTTP::Post.new(url)
request["api_key"] = ""
request["Content-Type"] = "application/json"

payload = {
  from: {
    email: "[email protected]",
    name: "Flight confirmation"
  },
  subject: "Your Barcelona flight e-ticket : BCN2118050657714",
  content: [
    {
      type: "html",
      value: "Hello Lionel, Your flight for Barcelona is confirmed."
    }
  ],
  personalizations: [
    {
      to: [
        {
          email: "[email protected]",
          name: "Lionel Messi"
        }
      ]
    }
  ]
}

request.body = payload.to_json

response = http.request(request)
puts response.body
package main

import (
    "bytes"
    "encoding/json"
    "fmt"
    "io"
    "net/http"
)

func main() {
    url := "https://emailapi.netcorecloud.net/v5/mail/send"

    payload := map[string]interface{}{
        "from": map[string]string{
            "email": "[email protected]",
            "name":  "Flight confirmation",
        },
        "subject": "Your Barcelona flight e-ticket : BCN2118050657714",
        "content": []map[string]string{
            {
                "type":  "html",
                "value": "Hello Lionel, Your flight for Barcelona is confirmed.",
            },
        },
        "personalizations": []map[string][]map[string]string{
            {
                "to": {
                    {
                        "email": "[email protected]",
                        "name":  "Lionel Messi",
                    },
                },
            },
        },
    }

    jsonData, err := json.Marshal(payload)
    if err != nil {
        fmt.Println("Error marshaling JSON:", err)
        return
    }

    req, err := http.NewRequest("POST", url, bytes.NewBuffer(jsonData))
    if err != nil {
        fmt.Println("Error creating request:", err)
        return
    }

    req.Header.Set("api_key", "")
    req.Header.Set("Content-Type", "application/json")

    client := &http.Client{}
    res, err := client.Do(req)
    if err != nil {
        fmt.Println("Error sending request:", err)
        return
    }
    defer res.Body.Close()

    body, err := io.ReadAll(res.Body)
    if err != nil {
        fmt.Println("Error reading response:", err)
        return
    }

    fmt.Println("Status:", res.Status)
    fmt.Println("Response:", string(body))
}

<?php

$curl = curl_init();

curl_setopt_array($curl, array(
  CURLOPT_URL => "https://emailapi.netcorecloud.net/v5/mail/send",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => "{\"from\":{\"email\":\"[email protected]\",\"name\":\"Flight confirmation\"},\"subject\":\"Your Barcelona flight e-ticket : BCN2118050657714\",\"content\":[{\"type\":\"html\",\"value\":\"Hello Lionel, Your flight for Barcelona is confirmed.\"}],\"personalizations\":[{\"to\":[{\"email\":\"[email protected]\",\"name\":\"Lionel Messi\"}]}]}",
  CURLOPT_HTTPHEADER => array(
    "api_key: <Your API Key>",
    "content-type: application/json"
  ),
));
$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

                                    
HttpResponse<String> response = Unirest.post("https://emailapi.netcorecloud.net/v5/mail/send")
  .header("api_key", "<Your API Key>")
  .header("content-type", "application/json")
  .body("{\"from\":{\"email\":\"[email protected]\",\"name\":\"Flight confirmation\"},\"subject\":\"Your Barcelona flight e-ticket : BCN2118050657714\",\"content\":[{\"type\":\"html\",\"value\":\"Hello Lionel, Your flight for Barcelona is confirmed.\"}],\"personalizations\":[{\"to\":[{\"email\":\"[email protected]\",\"name\":\"Lionel Messi\"}]}]}")
  .asString();
using RestSharp;
var client = new RestClient("https://emailapi.netcorecloud.net/v5/mail/send");

var request = new RestRequest(Method.POST);
request.AddHeader("api_key", "");
request.AddHeader("Content-Type", "application/json");

var payload = new
{
    from = new
    {
        email = "[email protected]",
        name = "Flight confirmation"
    },
    subject = "Your Barcelona flight e-ticket : BCN2118050657714",
    content = new[]
    {
        new
        {
            type = "html",
            value = "Hello Lionel, Your flight for Barcelona is confirmed."
        }
    },
    personalizations = new[]
    {
        new
        {
            to = new[]
            {
                new
                {
                    email = "[email protected]",
                    name = "Lionel Messi"
                }
            }
        }
    }
};

request.AddJsonBody(payload);

IRestResponse response = client.Execute(request);

// Output the response
Console.WriteLine("Status Code: " + response.StatusCode);
Console.WriteLine("Response: " + response.Content);
  wget --quiet \
  --header="api_key: " \
  --header="Content-Type: application/json" \
  --post-data='{
    "from": {
      "email": "[email protected]",
      "name": "Flight confirmation"
    },
    "subject": "Your Barcelona flight e-ticket : BCN2118050657714",
    "content": [
      {
        "type": "html",
        "value": "Hello Lionel, Your flight for Barcelona is confirmed."
      }
    ],
    "personalizations": [
      {
        "to": [
          {
            "email": "[email protected]",
            "name": "Lionel Messi"
          }
        ]
      }
    ]
  }' \
  --output-document=- \
  https://emailapi.netcorecloud.net/v5/mail/send
var data = JSON.stringify({
"from": {
  "email": "[email protected]",
  "name": "Flight confirmation"
},
"subject": "Your Barcelona flight e-ticket : BCN2118050657714",
"content": [
 {
    "type": "html",
    "value": "Hello Lionel, Your flight for Barcelona is confirmed."
  }
],
 "personalizations": [
 {
    "to": [
      {
        "email": "[email protected]",
        "name": "Lionel Messi"
        }
    ]
  }
 ]
});
var xhr = new XMLHttpRequest();
xhr.withCredentials = true;

xhr.addEventListener("readystatechange", function () {
 if (this.readyState === this.DONE) {
  console.log(this.responseText);
}
});
xhr.open("POST", "https://emailapi.netcorecloud.net/v5/mail/send");
xhr.setRequestHeader("api_key", "");
xhr.setRequestHeader("content-type", "application/json");

xhr.send(data);

Integrate and deliver emails in minutes with Netcore's RESTful APIs, SMTP relay, and SDKs, supporting your preferred programming languages. Our comprehensive documentation and quickstart guides ensure a seamless setup experience.

Our customer's success writes our story

AJIO Achieves 42% Conversion Uplift and 4x Higher Engagement with Netcore’s Email Innovation

Read full case study

Axis Max Life Insurance Achieves 93% Call Pickup Rate & 90% Policy Issuance Success with Netcore’s AMP Email Innovation

Read full case study

Cleartrip achieves a 410% increase in clicks with dynamic mailers powered by Netcore’s AMP for email

Read full case study

Bigbasket leverages Netcore’s email marketing and AI engine to achieve a 159% uplift in engagement and reactivate 20% of dormant users

Read full case study

ACT Fibernet achieves a whopping 7X uplift in CRP lead generation with Netcore’s AMP emails and AI-powered email marketing

Read full case study

Sercanto increases its inbox placement rate to 90% and drives up revenue by 10% with the Netcore Cloud email API

Read full case study

Truecaller’s email series, delivered through Netcore, witnessed 47% engagement and increased adoption of their improved iOS App

Read full case study

UK's leading online dating platform HubPeople achieves a staggering 78% increase in email engagement

Read full case study

How Netcore Cloud Helped Farmison & Co Drive 300% Growth in Conversion Through Smarter Email Marketing

Read full case study

SoftSages Achieves Over 50% Increase in Key KPIs with Netcore

Read full case study

Diamond Candles Boosts Email Engagement by 31% with Netcore's Inbox Commerce

Read full case study

Tobi Achieved a 94X Surge in Engagement with Affinity-Based Segmentation

Read full case study

Global Airport Parking Achieved a 200% Increase in Revenue with Netcore

Read full case study

Spinning Success: O!Millionaire’s 8X Click Rate Boost with Netcore Cloud’s Personalized and Engaging Approach

Read full case study

Polaris Bank increases clicks by 10% and decreases unsubscribes by 20% using Netcore’s AI-driven email marketing platform

Read full case study

Netcore helps Gulf News streamline their newsletters to increase deliverability & conversion, as well as improve advertisers’ ROI

Read full case study

Netcore Cloud’s AI-powered emails help R&B Fashion grow their online presence to keep pace with the brand’s growth across 6 countries

Read full case study

FAQs

What is Email API? Dropdown Arrow
APIs or Application Programming Interfaces are interfaces that help add new features to your existing applications without additional maintenance. You can add email-sending capabilities to your applications or websites with email-sending API. The emails can be triggered based on specific schedules or sent once an action on the web interface triggers an email.
How to send email using API? Dropdown Arrow
Email API allows you to send emails to your recipients using your sending domain. You would need an API Key to authenticate your API requests. Each API request will enable you to send an email to single or multiple recipients.
How to integrate Email API in PHP? Dropdown Arrow
There are two ways in which we can do the email integration with Netcore API:
● Netcore public Email API - It is an open API for public usage that can directly integrate into the user application.
● SDK - An SDK is a set of tools provided by the vendor for easy setup and working with an external API. Netcore provides SDKs for most of the popular programming languages, including PHP.
To use either integration, you need to have an API Key to authenticate your API requests. Each API call will enable you to send an email to a single or multiple recipients.
What is API vs SMTP email? Dropdown Arrow
SMTP (Simple Mail Transfer Protocol) is a standard protocol for sending emails between servers, acting like a postal service for email. API (Application Programming Interface) for email is a more modern, flexible method that allows applications to directly interact with an email service provider to send, track, and manage emails with more features and automation.
Ready to Build Smarter Emails?

Start sending intelligent, high-performing emails within minutes. Whether you're a marketer or a developer, our platform is made to scale with you.

Unlock unmatched customer experiences,
get started now
Let us show you what's possible with Netcore.