curl --request POST \
--url https://api.sendkit.dev/emails/bulk \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '
{
"emails": [
{
"to": "user@example.com",
"from": "Your Name <hello@yourdomain.com>",
"subject": "Welcome to SendKit",
"html": "<h1>Hello!</h1><p>Welcome aboard.</p>",
"text": "Hello! Welcome aboard.",
"cc": [
"<string>"
],
"bcc": [
"<string>"
],
"reply_to": [
"<string>"
],
"headers": {},
"tags": [
{
"name": "campaign",
"value": "welcome"
}
],
"scheduled_at": "2023-11-07T05:31:56Z",
"attachments": [
{
"filename": "invoice.pdf",
"content": "JVBERi0xLjQKJeLj...",
"content_type": "application/pdf"
}
],
"template": {
"id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
"variables": {}
}
}
]
}
'import requests
url = "https://api.sendkit.dev/emails/bulk"
payload = { "emails": [
{
"to": "user@example.com",
"from": "Your Name <hello@yourdomain.com>",
"subject": "Welcome to SendKit",
"html": "<h1>Hello!</h1><p>Welcome aboard.</p>",
"text": "Hello! Welcome aboard.",
"cc": ["<string>"],
"bcc": ["<string>"],
"reply_to": ["<string>"],
"headers": {},
"tags": [
{
"name": "campaign",
"value": "welcome"
}
],
"scheduled_at": "2023-11-07T05:31:56Z",
"attachments": [
{
"filename": "invoice.pdf",
"content": "JVBERi0xLjQKJeLj...",
"content_type": "application/pdf"
}
],
"template": {
"id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
"variables": {}
}
}
] }
headers = {
"Authorization": "Bearer <token>",
"Content-Type": "application/json"
}
response = requests.post(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'POST',
headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
body: JSON.stringify({
emails: [
{
to: 'user@example.com',
from: 'Your Name <hello@yourdomain.com>',
subject: 'Welcome to SendKit',
html: '<h1>Hello!</h1><p>Welcome aboard.</p>',
text: 'Hello! Welcome aboard.',
cc: ['<string>'],
bcc: ['<string>'],
reply_to: ['<string>'],
headers: {},
tags: [{name: 'campaign', value: 'welcome'}],
scheduled_at: '2023-11-07T05:31:56Z',
attachments: [
{
filename: 'invoice.pdf',
content: 'JVBERi0xLjQKJeLj...',
content_type: 'application/pdf'
}
],
template: {id: '3c90c3cc-0d44-4b50-8888-8dd25736052a', variables: {}}
}
]
})
};
fetch('https://api.sendkit.dev/emails/bulk', options)
.then(res => res.json())
.then(res => console.log(res))
.catch(err => console.error(err));<?php
$curl = curl_init();
curl_setopt_array($curl, [
CURLOPT_URL => "https://api.sendkit.dev/emails/bulk",
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([
'emails' => [
[
'to' => 'user@example.com',
'from' => 'Your Name <hello@yourdomain.com>',
'subject' => 'Welcome to SendKit',
'html' => '<h1>Hello!</h1><p>Welcome aboard.</p>',
'text' => 'Hello! Welcome aboard.',
'cc' => [
'<string>'
],
'bcc' => [
'<string>'
],
'reply_to' => [
'<string>'
],
'headers' => [
],
'tags' => [
[
'name' => 'campaign',
'value' => 'welcome'
]
],
'scheduled_at' => '2023-11-07T05:31:56Z',
'attachments' => [
[
'filename' => 'invoice.pdf',
'content' => 'JVBERi0xLjQKJeLj...',
'content_type' => 'application/pdf'
]
],
'template' => [
'id' => '3c90c3cc-0d44-4b50-8888-8dd25736052a',
'variables' => [
]
]
]
]
]),
CURLOPT_HTTPHEADER => [
"Authorization: Bearer <token>",
"Content-Type: application/json"
],
]);
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
if ($err) {
echo "cURL Error #:" . $err;
} else {
echo $response;
}package main
import (
"fmt"
"strings"
"net/http"
"io"
)
func main() {
url := "https://api.sendkit.dev/emails/bulk"
payload := strings.NewReader("{\n \"emails\": [\n {\n \"to\": \"user@example.com\",\n \"from\": \"Your Name <hello@yourdomain.com>\",\n \"subject\": \"Welcome to SendKit\",\n \"html\": \"<h1>Hello!</h1><p>Welcome aboard.</p>\",\n \"text\": \"Hello! Welcome aboard.\",\n \"cc\": [\n \"<string>\"\n ],\n \"bcc\": [\n \"<string>\"\n ],\n \"reply_to\": [\n \"<string>\"\n ],\n \"headers\": {},\n \"tags\": [\n {\n \"name\": \"campaign\",\n \"value\": \"welcome\"\n }\n ],\n \"scheduled_at\": \"2023-11-07T05:31:56Z\",\n \"attachments\": [\n {\n \"filename\": \"invoice.pdf\",\n \"content\": \"JVBERi0xLjQKJeLj...\",\n \"content_type\": \"application/pdf\"\n }\n ],\n \"template\": {\n \"id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n \"variables\": {}\n }\n }\n ]\n}")
req, _ := http.NewRequest("POST", url, payload)
req.Header.Add("Authorization", "Bearer <token>")
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))
}HttpResponse<String> response = Unirest.post("https://api.sendkit.dev/emails/bulk")
.header("Authorization", "Bearer <token>")
.header("Content-Type", "application/json")
.body("{\n \"emails\": [\n {\n \"to\": \"user@example.com\",\n \"from\": \"Your Name <hello@yourdomain.com>\",\n \"subject\": \"Welcome to SendKit\",\n \"html\": \"<h1>Hello!</h1><p>Welcome aboard.</p>\",\n \"text\": \"Hello! Welcome aboard.\",\n \"cc\": [\n \"<string>\"\n ],\n \"bcc\": [\n \"<string>\"\n ],\n \"reply_to\": [\n \"<string>\"\n ],\n \"headers\": {},\n \"tags\": [\n {\n \"name\": \"campaign\",\n \"value\": \"welcome\"\n }\n ],\n \"scheduled_at\": \"2023-11-07T05:31:56Z\",\n \"attachments\": [\n {\n \"filename\": \"invoice.pdf\",\n \"content\": \"JVBERi0xLjQKJeLj...\",\n \"content_type\": \"application/pdf\"\n }\n ],\n \"template\": {\n \"id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n \"variables\": {}\n }\n }\n ]\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.sendkit.dev/emails/bulk")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n \"emails\": [\n {\n \"to\": \"user@example.com\",\n \"from\": \"Your Name <hello@yourdomain.com>\",\n \"subject\": \"Welcome to SendKit\",\n \"html\": \"<h1>Hello!</h1><p>Welcome aboard.</p>\",\n \"text\": \"Hello! Welcome aboard.\",\n \"cc\": [\n \"<string>\"\n ],\n \"bcc\": [\n \"<string>\"\n ],\n \"reply_to\": [\n \"<string>\"\n ],\n \"headers\": {},\n \"tags\": [\n {\n \"name\": \"campaign\",\n \"value\": \"welcome\"\n }\n ],\n \"scheduled_at\": \"2023-11-07T05:31:56Z\",\n \"attachments\": [\n {\n \"filename\": \"invoice.pdf\",\n \"content\": \"JVBERi0xLjQKJeLj...\",\n \"content_type\": \"application/pdf\"\n }\n ],\n \"template\": {\n \"id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n \"variables\": {}\n }\n }\n ]\n}"
response = http.request(request)
puts response.read_body{
"data": [
{
"status": "success",
"id": "550e8400-e29b-41d4-a716-446655440000"
}
]
}{
"message": "Invalid API key."
}{
"message": "The email field is required."
}{
"name": "rate_limit_exceeded",
"message": "Rate limit exceeded. Please retry after 30 seconds."
}Send bulk emails
Send up to 100 individual emails in a single request. Each email in the array is independent — with its own recipient, subject, content, and optional template. The request body can be either an object with an emails key, or a plain JSON array of email objects. Each email follows the same rules as the single send endpoint: from, subject, and html/text are required unless a template is provided. Results are returned in the same order as the input array, with each entry indicating success (with an id) or error (with an error message).
curl --request POST \
--url https://api.sendkit.dev/emails/bulk \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '
{
"emails": [
{
"to": "user@example.com",
"from": "Your Name <hello@yourdomain.com>",
"subject": "Welcome to SendKit",
"html": "<h1>Hello!</h1><p>Welcome aboard.</p>",
"text": "Hello! Welcome aboard.",
"cc": [
"<string>"
],
"bcc": [
"<string>"
],
"reply_to": [
"<string>"
],
"headers": {},
"tags": [
{
"name": "campaign",
"value": "welcome"
}
],
"scheduled_at": "2023-11-07T05:31:56Z",
"attachments": [
{
"filename": "invoice.pdf",
"content": "JVBERi0xLjQKJeLj...",
"content_type": "application/pdf"
}
],
"template": {
"id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
"variables": {}
}
}
]
}
'import requests
url = "https://api.sendkit.dev/emails/bulk"
payload = { "emails": [
{
"to": "user@example.com",
"from": "Your Name <hello@yourdomain.com>",
"subject": "Welcome to SendKit",
"html": "<h1>Hello!</h1><p>Welcome aboard.</p>",
"text": "Hello! Welcome aboard.",
"cc": ["<string>"],
"bcc": ["<string>"],
"reply_to": ["<string>"],
"headers": {},
"tags": [
{
"name": "campaign",
"value": "welcome"
}
],
"scheduled_at": "2023-11-07T05:31:56Z",
"attachments": [
{
"filename": "invoice.pdf",
"content": "JVBERi0xLjQKJeLj...",
"content_type": "application/pdf"
}
],
"template": {
"id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
"variables": {}
}
}
] }
headers = {
"Authorization": "Bearer <token>",
"Content-Type": "application/json"
}
response = requests.post(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'POST',
headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
body: JSON.stringify({
emails: [
{
to: 'user@example.com',
from: 'Your Name <hello@yourdomain.com>',
subject: 'Welcome to SendKit',
html: '<h1>Hello!</h1><p>Welcome aboard.</p>',
text: 'Hello! Welcome aboard.',
cc: ['<string>'],
bcc: ['<string>'],
reply_to: ['<string>'],
headers: {},
tags: [{name: 'campaign', value: 'welcome'}],
scheduled_at: '2023-11-07T05:31:56Z',
attachments: [
{
filename: 'invoice.pdf',
content: 'JVBERi0xLjQKJeLj...',
content_type: 'application/pdf'
}
],
template: {id: '3c90c3cc-0d44-4b50-8888-8dd25736052a', variables: {}}
}
]
})
};
fetch('https://api.sendkit.dev/emails/bulk', options)
.then(res => res.json())
.then(res => console.log(res))
.catch(err => console.error(err));<?php
$curl = curl_init();
curl_setopt_array($curl, [
CURLOPT_URL => "https://api.sendkit.dev/emails/bulk",
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([
'emails' => [
[
'to' => 'user@example.com',
'from' => 'Your Name <hello@yourdomain.com>',
'subject' => 'Welcome to SendKit',
'html' => '<h1>Hello!</h1><p>Welcome aboard.</p>',
'text' => 'Hello! Welcome aboard.',
'cc' => [
'<string>'
],
'bcc' => [
'<string>'
],
'reply_to' => [
'<string>'
],
'headers' => [
],
'tags' => [
[
'name' => 'campaign',
'value' => 'welcome'
]
],
'scheduled_at' => '2023-11-07T05:31:56Z',
'attachments' => [
[
'filename' => 'invoice.pdf',
'content' => 'JVBERi0xLjQKJeLj...',
'content_type' => 'application/pdf'
]
],
'template' => [
'id' => '3c90c3cc-0d44-4b50-8888-8dd25736052a',
'variables' => [
]
]
]
]
]),
CURLOPT_HTTPHEADER => [
"Authorization: Bearer <token>",
"Content-Type: application/json"
],
]);
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
if ($err) {
echo "cURL Error #:" . $err;
} else {
echo $response;
}package main
import (
"fmt"
"strings"
"net/http"
"io"
)
func main() {
url := "https://api.sendkit.dev/emails/bulk"
payload := strings.NewReader("{\n \"emails\": [\n {\n \"to\": \"user@example.com\",\n \"from\": \"Your Name <hello@yourdomain.com>\",\n \"subject\": \"Welcome to SendKit\",\n \"html\": \"<h1>Hello!</h1><p>Welcome aboard.</p>\",\n \"text\": \"Hello! Welcome aboard.\",\n \"cc\": [\n \"<string>\"\n ],\n \"bcc\": [\n \"<string>\"\n ],\n \"reply_to\": [\n \"<string>\"\n ],\n \"headers\": {},\n \"tags\": [\n {\n \"name\": \"campaign\",\n \"value\": \"welcome\"\n }\n ],\n \"scheduled_at\": \"2023-11-07T05:31:56Z\",\n \"attachments\": [\n {\n \"filename\": \"invoice.pdf\",\n \"content\": \"JVBERi0xLjQKJeLj...\",\n \"content_type\": \"application/pdf\"\n }\n ],\n \"template\": {\n \"id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n \"variables\": {}\n }\n }\n ]\n}")
req, _ := http.NewRequest("POST", url, payload)
req.Header.Add("Authorization", "Bearer <token>")
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))
}HttpResponse<String> response = Unirest.post("https://api.sendkit.dev/emails/bulk")
.header("Authorization", "Bearer <token>")
.header("Content-Type", "application/json")
.body("{\n \"emails\": [\n {\n \"to\": \"user@example.com\",\n \"from\": \"Your Name <hello@yourdomain.com>\",\n \"subject\": \"Welcome to SendKit\",\n \"html\": \"<h1>Hello!</h1><p>Welcome aboard.</p>\",\n \"text\": \"Hello! Welcome aboard.\",\n \"cc\": [\n \"<string>\"\n ],\n \"bcc\": [\n \"<string>\"\n ],\n \"reply_to\": [\n \"<string>\"\n ],\n \"headers\": {},\n \"tags\": [\n {\n \"name\": \"campaign\",\n \"value\": \"welcome\"\n }\n ],\n \"scheduled_at\": \"2023-11-07T05:31:56Z\",\n \"attachments\": [\n {\n \"filename\": \"invoice.pdf\",\n \"content\": \"JVBERi0xLjQKJeLj...\",\n \"content_type\": \"application/pdf\"\n }\n ],\n \"template\": {\n \"id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n \"variables\": {}\n }\n }\n ]\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.sendkit.dev/emails/bulk")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n \"emails\": [\n {\n \"to\": \"user@example.com\",\n \"from\": \"Your Name <hello@yourdomain.com>\",\n \"subject\": \"Welcome to SendKit\",\n \"html\": \"<h1>Hello!</h1><p>Welcome aboard.</p>\",\n \"text\": \"Hello! Welcome aboard.\",\n \"cc\": [\n \"<string>\"\n ],\n \"bcc\": [\n \"<string>\"\n ],\n \"reply_to\": [\n \"<string>\"\n ],\n \"headers\": {},\n \"tags\": [\n {\n \"name\": \"campaign\",\n \"value\": \"welcome\"\n }\n ],\n \"scheduled_at\": \"2023-11-07T05:31:56Z\",\n \"attachments\": [\n {\n \"filename\": \"invoice.pdf\",\n \"content\": \"JVBERi0xLjQKJeLj...\",\n \"content_type\": \"application/pdf\"\n }\n ],\n \"template\": {\n \"id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n \"variables\": {}\n }\n }\n ]\n}"
response = http.request(request)
puts response.read_body{
"data": [
{
"status": "success",
"id": "550e8400-e29b-41d4-a716-446655440000"
}
]
}{
"message": "Invalid API key."
}{
"message": "The email field is required."
}{
"name": "rate_limit_exceeded",
"message": "Rate limit exceeded. Please retry after 30 seconds."
}Authorizations
API key from your SendKit dashboard. Pass it as a Bearer token in the Authorization header.
Body
Array of email objects to send. Each email is independent with its own recipient, content, and options. You can also send a plain JSON array (without the emails wrapper key).
1 - 100 elementsShow child attributes
Show child attributes
Response
Emails accepted for delivery
Array of results in the same order as the input. Each entry indicates success or error.
Successful email.
- Option 1
- Option 2
Show child attributes
Show child attributes

