The following headers are included in every response: Header Description ratelimit-limit Maximum requests per second ratelimit-remaining Remaining requests in current second ratelimit-reset Seconds until rate limit resets ratelimit-daily-limit Maximum daily requests ratelimit-daily-remaining Remaining daily requests ratelimit-daily-reset Seconds until daily limit resets const response = await fetch('https://api.emailit.com/v2/emails', { method: 'POST', headers: { 'Authorization': 'Bearer em_test_51RxCWJ...vS00p61e0qRE', 'Content-Type': 'application/json' }, body: JSON.stringify({ from: 'Your Company ', to: ['recipient1@example.com', 'recipient2@example.com'], subject: 'Hello World', html: '

Welcome!

Thanks for signing up.

', tracking: { loads: true, clicks: true } }) }); const result = await response.json(); 'https://api.emailit.com/v2/emails', CURLOPT_RETURNTRANSFER => true, CURLOPT_ENCODING => '', CURLOPT_MAXREDIRS => 10, CURLOPT_TIMEOUT => 30, CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1, CURLOPT_CUSTOMREQUEST => 'POST', CURLOPT_POSTFIELDS => json_encode([ 'from' => 'Your Company ', 'to' => ['recipient1@example.com', 'recipient2@example.com'], 'subject' => 'Hello World', 'html' => '

Welcome!

Thanks for signing up.

', 'tracking' => [ 'loads' => true, 'clicks' => true ] ]), CURLOPT_HTTPHEADER => [ 'Authorization: Bearer em_test_51RxCWJ...vS00p61e0qRE', 'Content-Type: application/json' ], ]); $response = curl_exec($curl); $err = curl_error($curl); curl_close($curl); if ($err) { echo "cURL Error #:" . $err; } else { $result = json_decode($response, true); print_r($result); } import requests response = requests.post( 'https://api.emailit.com/v2/emails', headers={ 'Authorization': 'Bearer em_test_51RxCWJ...vS00p61e0qRE', 'Content-Type': 'application/json' }, json={ 'from': 'Your Company ', 'to': ['recipient1@example.com', 'recipient2@example.com'], 'subject': 'Hello World', 'html': '

Welcome!

Thanks for signing up.

', 'tracking': { 'loads': True, 'clicks': True } } ) result = response.json() print(result) require 'net/http' require 'json' uri = URI('https://api.emailit.com/v2/emails') http = Net::HTTP.new(uri.host, uri.port) http.use_ssl = true request = Net::HTTP::Post.new(uri) request['Authorization'] = 'Bearer em_test_51RxCWJ...vS00p61e0qRE' request['Content-Type'] = 'application/json' request.body = { from: 'Your Company ', to: ['recipient1@example.com', 'recipient2@example.com'], subject: 'Hello World', html: '

Welcome!

Thanks for signing up.

', tracking: { loads: true, clicks: true } }.to_json response = http.request(request) result = JSON.parse(response.body) puts result package main import ( "bytes" "encoding/json" "fmt" "net/http" ) func main() { url := "https://api.emailit.com/v2/emails" data := map[string]interface{}{ "from": "Your Company ", "to": []string{"recipient1@example.com", "recipient2@example.com"}, "subject": "Hello World", "html": "

Welcome!

Thanks for signing up.

", "tracking": map[string]bool{ "loads": true, "clicks": true, }, } jsonData, _ := json.Marshal(data) req, _ := http.NewRequest("POST", url, bytes.NewBuffer(jsonData)) req.Header.Set("Authorization", "Bearer em_test_51RxCWJ...vS00p61e0qRE") req.Header.Set("Content-Type", "application/json") client := &http.Client{} resp, _ := client.Do(req) defer resp.Body.Close() var result map[string]interface{} json.NewDecoder(resp.Body).Decode(&result) fmt.Println(result) } use reqwest; use serde_json::{json, Value}; #[tokio::main] async fn main() -> Result<(), Box> { let client = reqwest::Client::new(); let response = client .post("https://api.emailit.com/v2/emails") .header("Authorization", "Bearer em_test_51RxCWJ...vS00p61e0qRE") .header("Content-Type", "application/json") .json(&json!({ "from": "Your Company ", "to": ["recipient1@example.com", "recipient2@example.com"], "subject": "Hello World", "html": "

Welcome!

Thanks for signing up.

", "tracking": { "loads": true, "clicks": true } })) .send() .await?; let result: Value = response.json().await?; println!("{:?}", result); Ok(()) } import java.net.http.HttpClient; import java.net.http.HttpRequest; import java.net.http.HttpResponse; import java.net.URI; import java.net.http.HttpRequest.BodyPublishers; public class SendEmail { public static void main(String[] args) throws Exception { HttpClient client = HttpClient.newHttpClient(); String jsonBody = """ { "from": "Your Company ", "to": ["recipient1@example.com", "recipient2@example.com"], "subject": "Hello World", "html": "

Welcome!

Thanks for signing up.

", "tracking": {"loads": true, "clicks": true} } """; HttpRequest request = HttpRequest.newBuilder() .uri(URI.create("https://api.emailit.com/v2/emails")) .header("Authorization", "Bearer em_test_51RxCWJ...vS00p61e0qRE") .header("Content-Type", "application/json") .POST(BodyPublishers.ofString(jsonBody)) .build(); HttpResponse response = client.send(request, HttpResponse.BodyHandlers.ofString()); System.out.println(response.body()); } } using System; using System.Net.Http; using System.Text; using System.Threading.Tasks; using Newtonsoft.Json; public class SendEmail { public static async Task Main() { using (var client = new HttpClient()) { client.DefaultRequestHeaders.Add("Authorization", "Bearer em_test_51RxCWJ...vS00p61e0qRE"); var data = new { from = "Your Company ", to = new[] { "recipient1@example.com", "recipient2@example.com" }, subject = "Hello World", html = "

Welcome!

Thanks for signing up.

", tracking = new { loads = true, clicks = true } }; var json = JsonConvert.SerializeObject(data); var content = new StringContent(json, Encoding.UTF8, "application/json"); var response = await client.PostAsync( "https://api.emailit.com/v2/emails", content); var result = await response.Content.ReadAsStringAsync(); Console.WriteLine(result); } } } curl -X POST https://api.emailit.com/v2/emails \ -H "Authorization: Bearer em_test_51RxCWJ...vS00p61e0qRE" \ -H "Content-Type: application/json" \ -d '{ "from": "Your Company ", "to": ["recipient1@example.com", "recipient2@example.com"], "subject": "Hello World", "html": "

Welcome!

Thanks for signing up.

", "tracking": { "loads": true, "clicks": true } }' const response = await fetch('https://api.emailit.com/v2/emails', { method: 'POST', headers: { 'Authorization': 'Bearer em_test_51RxCWJ...vS00p61e0qRE', 'Content-Type': 'application/json' }, body: JSON.stringify({ from: 'hello@yourdomain.com', to: 'user@example.com', template: 'welcome_email', variables: { name: 'John Doe', company: 'Acme Inc', activation_url: 'https://example.com/activate?token=abc123' } }) }); const result = await response.json(); curl -X POST https://api.emailit.com/v2/emails \ -H "Authorization: Bearer em_test_51RxCWJ...vS00p61e0qRE" \ -H "Content-Type: application/json" \ -d '{ "from": "hello@yourdomain.com", "to": "user@example.com", "template": "welcome_email", "variables": { "name": "John Doe", "company": "Acme Inc", "activation_url": "https://example.com/activate?token=abc123" } }' const response = await fetch('https://api.emailit.com/v2/emails', { method: 'POST', headers: { 'Authorization': 'Bearer em_test_51RxCWJ...vS00p61e0qRE', 'Content-Type': 'application/json' }, body: JSON.stringify({ from: 'invoices@yourdomain.com', to: 'customer@example.com', subject: 'Your Invoice #12345', html: '

Please find your invoice attached.

', attachments: [ { filename: 'invoice-12345.pdf', content: 'JVBERi0xLjQKJcOkw7zDqc...', // base64 encoded content_type: 'application/pdf' } ] }) }); const result = await response.json(); curl -X POST https://api.emailit.com/v2/emails \ -H "Authorization: Bearer em_test_51RxCWJ...vS00p61e0qRE" \ -H "Content-Type: application/json" \ -d '{ "from": "invoices@yourdomain.com", "to": "customer@example.com", "subject": "Your Invoice #12345", "html": "

Please find your invoice attached.

", "attachments": [ { "filename": "invoice-12345.pdf", "content": "JVBERi0xLjQKJcOkw7zDqc...", "content_type": "application/pdf" } ] }' const response = await fetch('https://api.emailit.com/v2/emails', { method: 'POST', headers: { 'Authorization': 'Bearer em_test_51RxCWJ...vS00p61e0qRE', 'Content-Type': 'application/json' }, body: JSON.stringify({ from: 'reminders@yourdomain.com', to: 'user@example.com', subject: 'Appointment Reminder', html: '

Your appointment is tomorrow at 2 PM.

', scheduled_at: 'tomorrow at 9am' }) }); const result = await response.json(); curl -X POST https://api.emailit.com/v2/emails \ -H "Authorization: Bearer em_test_51RxCWJ...vS00p61e0qRE" \ -H "Content-Type: application/json" \ -d '{ "from": "reminders@yourdomain.com", "to": "user@example.com", "subject": "Appointment Reminder", "html": "

Your appointment is tomorrow at 2 PM.

", "scheduled_at": "2026-01-10T09:00:00Z" }' { "object": "email", "id": "em_abc123xyz789def456ghi012jkl345", "ids": { "recipient1@example.com": "em_abc123xyz789def456ghi012jkl345", "recipient2@example.com": "em_def456abc789ghi012jkl345mno678" }, "token": "abc123xyz789", "message_id": "", "from": "hello@yourdomain.com", "to": ["recipient1@example.com", "recipient2@example.com"], "cc": ["cc@example.com"], "bcc": ["bcc@example.com"], "subject": "Hello World", "status": "pending", "scheduled_at": null, "created_at": "2026-01-08T12:00:00.123456Z", "tracking": { "loads": true, "clicks": true } } { "object": "email", "id": "em_abc123xyz789def456ghi012jkl345", "token": "abc123xyz789", "message_id": "", "from": "hello@yourdomain.com", "to": ["user@example.com"], "subject": "Appointment Reminder", "status": "scheduled", "scheduled_at": "2026-01-10T09:00:00.000Z", "created_at": "2026-01-08T12:00:00.123456Z", "tracking": { "loads": true, "clicks": true } } { "error": "Validation failed", "validation_errors": [ "Missing required field: from", "Invalid to email address at index 0: invalid-email" ] } { "error": "Template not found", "details": "Template 'welcome_email' not found or not published" } { "error": "Message too large", "details": "Message size (45MB) exceeds maximum allowed size of 40MB" } { "error": "From/Sender domain is not valid or not verified", "details": "The domain from email address 'sender@unverified.com' is not verified in your workspace" } { "error": "Rate limit exceeded", "message": "Too many requests. Maximum 10 messages per second allowed.", "limit": 10, "current": 11, "retry_after": 1 } html pre.shiki code .sN7LL, html code.shiki .sN7LL{--shiki-default:#9D7CD8;--shiki-default-font-style:italic}html pre.shiki code .sd1Qi, html code.shiki .sd1Qi{--shiki-default:#BB9AF7}html pre.shiki code .sAklC, html code.shiki .sAklC{--shiki-default:#89DDFF}html pre.shiki code .sEsAJ, html code.shiki .sEsAJ{--shiki-default:#BB9AF7;--shiki-default-font-style:italic}html pre.shiki code .s3R4Z, html code.shiki .s3R4Z{--shiki-default:#7AA2F7}html pre.shiki code .sgJMe, html code.shiki .sgJMe{--shiki-default:#9ABDF5}html pre.shiki code .sPY7s, html code.shiki .sPY7s{--shiki-default:#9ECE6A}html pre.shiki code .syYvs, html code.shiki .syYvs{--shiki-default:#73DACA}html pre.shiki code .sySf4, html code.shiki .sySf4{--shiki-default:#0DB9D7}html pre.shiki code .sJ0GE, html code.shiki .sJ0GE{--shiki-default:#41A6B5}html pre.shiki code .sOJ5S, html code.shiki .sOJ5S{--shiki-default:#FF9E64}html pre.shiki code .sE3pS, html code.shiki .sE3pS{--shiki-default:#C0CAF5}html .default .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html pre.shiki code .sT800, html code.shiki .sT800{--shiki-default:#E0AF68}html pre.shiki code .su0L4, html code.shiki .su0L4{--shiki-default:#7DCFFF}html pre.shiki code .sGX4V, html code.shiki .sGX4V{--shiki-default:#A9B1D6}html pre.shiki code .s6cf3, html code.shiki .s6cf3{--shiki-default:#89DDFF;--shiki-default-font-style:italic}html pre.shiki code .sbD-w, html code.shiki .sbD-w{--shiki-default:#51597D;--shiki-default-font-style:italic}