Create Broadcast

Create a new broadcast to send to your contacts.

Body Parameters

The ID of the segment you want to send to.

from (string, required) — Sender email address.

To include a friendly name, pass the sender as Name <email@example.com>, for example Acme <onboarding@example.dev>.
subject (string, required) — Email subject.

Reply-to email address. For multiple addresses, send as an array of strings.

html (string) — The HTML version of the message. You can include Contact Properties in the body of the Broadcast. Learn more about Contact Properties.
text (string) — The plain text version of the message. You can include Contact Properties in the body of the Broadcast. Learn more about Contact Properties.

If not provided, the HTML will be used to generate a plain text version. You can opt out of this behavior by setting value to an empty string.
react (React.ReactNode) — The React component used to write the message. Only available in the Node.js SDK.
name (string) — The friendly name of the broadcast. Only used for internal reference.

Optional. Omit it to send to every subscribed contact in the segment, without checking topic preferences.

send (boolean) — Send the broadcast immediately after creation. Defaults to false.

When set to true, the broadcast will be sent or scheduled (if scheduled_at is provided) without requiring a separate call to the Send Broadcast endpoint.

Schedule the broadcast to be sent later. The date should be in natural language (e.g.: in 1 min) or ISO 8601 format (e.g: 2026-08-05T11:52:01.858Z).

Node.js

import { Resend } from 'resend';

const resend = new Resend('re_xxxxxxxxx');

// Create a draft broadcast
const { data, error } = await resend.broadcasts.create({
  segmentId: '78261eea-8f8b-4381-83c6-79fa7120f1cf',
  from: 'Acme <onboarding@resend.dev>',
  subject: 'hello world',
  html: 'Hi {{{contact.first_name|there}}}, you can unsubscribe here: {{{RESEND_UNSUBSCRIBE_URL}}}',
});

// Create and send immediately
const { data: sent, error: sendError } = await resend.broadcasts.create({
  segmentId: '78261eea-8f8b-4381-83c6-79fa7120f1cf',
  from: 'Acme <onboarding@resend.dev>',
  subject: 'hello world',
  html: 'Hi {{{contact.first_name|there}}}, you can unsubscribe here: {{{RESEND_UNSUBSCRIBE_URL}}}',
  send: true,
});

// Create and schedule
const { data: scheduled, error: scheduleError } =
  await resend.broadcasts.create({
    segmentId: '78261eea-8f8b-4381-83c6-79fa7120f1cf',
    from: 'Acme <onboarding@resend.dev>',
    subject: 'hello world',
    html: 'Hi {{{contact.first_name|there}}}, you can unsubscribe here: {{{RESEND_UNSUBSCRIBE_URL}}}',
    send: true,
    scheduledAt: 'in 1 hour',
  });

PHP

$resend = Resend::client('re_xxxxxxxxx');

// Create a draft broadcast
$resend->broadcasts->create([
  'segment_id' => '78261eea-8f8b-4381-83c6-79fa7120f1cf',
  'from' => 'Acme <onboarding@resend.dev>',
  'subject' => 'hello world',
  'html' => 'Hi {{{contact.first_name|there}}}, you can unsubscribe here: {{{RESEND_UNSUBSCRIBE_URL}}}',
]);

// Create and send immediately
$resend->broadcasts->create([
  'segment_id' => '78261eea-8f8b-4381-83c6-79fa7120f1cf',
  'from' => 'Acme <onboarding@resend.dev>',
  'subject' => 'hello world',
  'html' => 'Hi {{{contact.first_name|there}}}, you can unsubscribe here: {{{RESEND_UNSUBSCRIBE_URL}}}',
  'send' => true,
]);

// Create and schedule
$resend->broadcasts->create([
  'segment_id' => '78261eea-8f8b-4381-83c6-79fa7120f1cf',
  'from' => 'Acme <onboarding@resend.dev>',
  'subject' => 'hello world',
  'html' => 'Hi {{{contact.first_name|there}}}, you can unsubscribe here: {{{RESEND_UNSUBSCRIBE_URL}}}',
  'send' => true,
  'scheduled_at' => 'in 1 hour',
]);

Python

import resend

resend.api_key = "re_xxxxxxxxx"

# Create a draft broadcast
params: resend.Broadcasts.CreateParams = {
  "segment_id": "78261eea-8f8b-4381-83c6-79fa7120f1cf",
  "from": "Acme <onboarding@resend.dev>",
  "subject": "Hello, world!",
  "html": "Hi {{{contact.first_name|there}}}, you can unsubscribe here: {{{RESEND_UNSUBSCRIBE_URL}}}",
}
resend.Broadcasts.create(params)

# Create and send immediately
params: resend.Broadcasts.CreateParams = {
  "segment_id": "78261eea-8f8b-4381-83c6-79fa7120f1cf",
  "from": "Acme <onboarding@resend.dev>",
  "subject": "Hello, world!",
  "html": "Hi {{{contact.first_name|there}}}, you can unsubscribe here: {{{RESEND_UNSUBSCRIBE_URL}}}",
  "send": True,
}
resend.Broadcasts.create(params)

# Create and schedule
params: resend.Broadcasts.CreateParams = {
  "segment_id": "78261eea-8f8b-4381-83c6-79fa7120f1cf",
  "from": "Acme <onboarding@resend.dev>",
  "subject": "Hello, world!",
  "html": "Hi {{{contact.first_name|there}}}, you can unsubscribe here: {{{RESEND_UNSUBSCRIBE_URL}}}",
  "send": True,
  "scheduled_at": "in 1 hour",
}
resend.Broadcasts.create(params)

Ruby

require "resend"

Resend.api_key = "re_xxxxxxxxx"

# Create a draft broadcast
params = {
  "segment_id": "78261eea-8f8b-4381-83c6-79fa7120f1cf",
  "from": "Acme <onboarding@resend.dev>",
  "subject": "hello world",
  "html": "Hi {{{contact.first_name|there}}}, you can unsubscribe here: {{{RESEND_UNSUBSCRIBE_URL}}}",
}
Resend::Broadcasts.create(params)

# Create and send immediately
params = {
  "segment_id": "78261eea-8f8b-4381-83c6-79fa7120f1cf",
  "from": "Acme <onboarding@resend.dev>",
  "subject": "Hello, world!",
  "html": "Hi {{{contact.first_name|there}}}, you can unsubscribe here: {{{RESEND_UNSUBSCRIBE_URL}}}",
  "send": true,
}
Resend::Broadcasts.create(params)

# Create and schedule
params = {
  "segment_id": "78261eea-8f8b-4381-83c6-79fa7120f1cf",
  "from": "Acme <onboarding@resend.dev>",
  "subject": "Hello, world!",
  "html": "Hi {{{contact.first_name|there}}}, you can unsubscribe here: {{{RESEND_UNSUBSCRIBE_URL}}}",
  "send": true,
  "scheduled_at": "in 1 hour",
}
Resend::Broadcasts.create(params)

package main

import "github.com/resend/resend-go/v4"

func main() {
	client := resend.NewClient("re_xxxxxxxxx")

	// Create a draft broadcast
	params := &resend.CreateBroadcastRequest{
		SegmentId: "78261eea-8f8b-4381-83c6-79fa7120f1cf",
		From:      "Acme <onboarding@resend.dev>",
		Html:      "Hi {{{contact.first_name|there}}}, you can unsubscribe here: {{{RESEND_UNSUBSCRIBE_URL}}}",
		Subject:   "Hello, world!",
	}
	client.Broadcasts.Create(params)

	// Create and send immediately
	params = &resend.CreateBroadcastRequest{
		SegmentId: "78261eea-8f8b-4381-83c6-79fa7120f1cf",
		From:      "Acme <onboarding@resend.dev>",
		Subject:   "Hello, world!",
		Html:      "Hi {{{contact.first_name|there}}}, you can unsubscribe here: {{{RESEND_UNSUBSCRIBE_URL}}}",
		Send:      true,
	}
	client.Broadcasts.Create(params)

	// Create and schedule
	params = &resend.CreateBroadcastRequest{
		SegmentId:   "78261eea-8f8b-4381-83c6-79fa7120f1cf",
		From:        "Acme <onboarding@resend.dev>",
		Subject:     "Hello, world!",
		Html:        "Hi {{{contact.first_name|there}}}, you can unsubscribe here: {{{RESEND_UNSUBSCRIBE_URL}}}",
		Send:        true,
		ScheduledAt: "in 1 hour",
	}
	client.Broadcasts.Create(params)
}

Rust

use resend_rs::{types::CreateBroadcastOptions, Resend, Result};

#[tokio::main]
async fn main() -> Result<()> {
  let resend = Resend::new("re_xxxxxxxxx");

  let segment_id = "78261eea-8f8b-4381-83c6-79fa7120f1cf";
  let from = "Acme <onboarding@resend.dev>";
  let subject = "hello world";
  let html = "Hi {{{contact.first_name|there}}}, you can unsubscribe here: {{{RESEND_UNSUBSCRIBE_URL}}}";

  let opts = CreateBroadcastOptions::new(segment_id, from, subject).with_html(html);

  // Create a draft broadcast
  let _broadcast = resend.broadcasts.create(opts.clone()).await?;

  // Create and send immediately
  let _broadcast = resend
    .broadcasts
    .create(opts.clone().with_send(true))
    .await?;

  // Create and schedule
  let _broadcast = resend
    .broadcasts
    .create(opts.with_send(true).with_scheduled_at("in 1 hour"))
    .await?;

  Ok(())
}

Java

import com.resend.Resend;
import com.resend.services.broadcasts.model.CreateBroadcastOptions;
import com.resend.services.broadcasts.model.CreateBroadcastResponseSuccess;

Resend resend = new Resend("re_xxxxxxxxx");

// Create a draft broadcast
CreateBroadcastOptions params = CreateBroadcastOptions.builder()
    .segmentId("78261eea-8f8b-4381-83c6-79fa7120f1cf")
    .from("Acme <onboarding@resend.dev>")
    .subject("hello world")
    .html("Hi {{{contact.first_name|there}}}, you can unsubscribe here: {{{RESEND_UNSUBSCRIBE_URL}}}")
    .build();
CreateBroadcastResponseSuccess data = resend.broadcasts().create(params);

// Create and send immediately
CreateBroadcastOptions sendParams = CreateBroadcastOptions.builder()
    .segmentId("78261eea-8f8b-4381-83c6-79fa7120f1cf")
    .from("Acme <onboarding@resend.dev>")
    .subject("hello world")
    .html("Hi {{{contact.first_name|there}}}, you can unsubscribe here: {{{RESEND_UNSUBSCRIBE_URL}}}")
    .send(true)
    .build();
CreateBroadcastResponseSuccess sent = resend.broadcasts().create(sendParams);

// Create and schedule
CreateBroadcastOptions scheduleParams = CreateBroadcastOptions.builder()
    .segmentId("78261eea-8f8b-4381-83c6-79fa7120f1cf")
    .from("Acme <onboarding@resend.dev>")
    .subject("hello world")
    .html("Hi {{{contact.first_name|there}}}, you can unsubscribe here: {{{RESEND_UNSUBSCRIBE_URL}}}")
    .send(true)
    .scheduledAt("in 1 hour")
    .build();
CreateBroadcastResponseSuccess scheduled = resend.broadcasts().create(scheduleParams);

.NET

using Resend;

IResend resend = ResendClient.Create( "re_xxxxxxxxx" ); // Or from DI

// Create a draft broadcast
var resp = await resend.BroadcastAddAsync(
    new BroadcastData()
    {
        DisplayName = "Example Broadcast",
        SegmentId = new Guid( "78261eea-8f8b-4381-83c6-79fa7120f1cf" ),
        From = "Acme <onboarding@resend.dev>",
        Subject = "Hello, world!",
        HtmlBody = "Hi {{{contact.first_name|there}}}, you can unsubscribe here: {{{RESEND_UNSUBSCRIBE_URL}}}",
    }
);

Console.WriteLine( "Broadcast Id={0}", resp.Content );

// Create and send immediately
var sent = await resend.BroadcastAddAsync(
    new BroadcastData()
    {
        DisplayName = "Example Broadcast",
        SegmentId = new Guid( "78261eea-8f8b-4381-83c6-79fa7120f1cf" ),
        From = "Acme <onboarding@resend.dev>",
        Subject = "Hello, world!",
        HtmlBody = "Hi {{{contact.first_name|there}}}, you can unsubscribe here: {{{RESEND_UNSUBSCRIBE_URL}}}",
        SendAfterAdd = true,
    }
);

Console.WriteLine( "Broadcast Id={0}", sent.Content );

// Create and schedule
var scheduled = await resend.BroadcastAddAsync(
    new BroadcastData()
    {
        DisplayName = "Example Broadcast",
        SegmentId = new Guid( "78261eea-8f8b-4381-83c6-79fa7120f1cf" ),
        From = "Acme <onboarding@resend.dev>",
        Subject = "Hello, world!",
        HtmlBody = "Hi {{{contact.first_name|there}}}, you can unsubscribe here: {{{RESEND_UNSUBSCRIBE_URL}}}",
        SendAfterAdd = true,
        MomentSchedule = DateTime.UtcNow.AddHours( 1 ),
    }
);

Console.WriteLine( "Broadcast Id={0}", scheduled.Content );

cURL

# Create a draft broadcast
curl -X POST 'https://api.resend.com/broadcasts' \
     -H 'Authorization: Bearer re_xxxxxxxxx' \
     -H 'Content-Type: application/json' \
     -d $'
{
  "segment_id": "78261eea-8f8b-4381-83c6-79fa7120f1cf",
  "from": "Acme <onboarding@resend.dev>",
  "subject": "hello world",
  "html": "Hi {{{contact.first_name|there}}}, you can unsubscribe here: {{{RESEND_UNSUBSCRIBE_URL}}}"
}'

# Create and send immediately
curl -X POST 'https://api.resend.com/broadcasts' \
 -H 'Authorization: Bearer re_xxxxxxxxx' \
 -H 'Content-Type: application/json' \
 -d $'
{
  "segment_id": "78261eea-8f8b-4381-83c6-79fa7120f1cf",
  "from": "Acme <onboarding@resend.dev>",
  "subject": "hello world",
  "html": "Hi {{{contact.first_name|there}}}, you can unsubscribe here: {{{RESEND_UNSUBSCRIBE_URL}}}",
  "send": true
}'

# Create and schedule
curl -X POST 'https://api.resend.com/broadcasts' \
 -H 'Authorization: Bearer re_xxxxxxxxx' \
 -H 'Content-Type: application/json' \
 -d $'
{
  "segment_id": "78261eea-8f8b-4381-83c6-79fa7120f1cf",
  "from": "Acme <onboarding@resend.dev>",
  "subject": "hello world",
  "html": "Hi {{{contact.first_name|there}}}, you can unsubscribe here: {{{RESEND_UNSUBSCRIBE_URL}}}",
  "send": true,
  "scheduled_at": "in 1 hour"
}'

CLI

# Create a draft broadcast
resend broadcasts create \
  --from "Acme <onboarding@resend.dev>" \
  --subject "hello world" \
  --segment-id 78261eea-8f8b-4381-83c6-79fa7120f1cf \
  --html "Hi {{{contact.first_name|there}}}, you can unsubscribe here: {{{RESEND_UNSUBSCRIBE_URL}}}"

# Create and send immediately
resend broadcasts create \
  --from "Acme <onboarding@resend.dev>" \
  --subject "hello world" \
  --segment-id 78261eea-8f8b-4381-83c6-79fa7120f1cf \
  --html "Hi {{{contact.first_name|there}}}, you can unsubscribe here: {{{RESEND_UNSUBSCRIBE_URL}}}" \
  --send

# Create and schedule
resend broadcasts create \
  --from "Acme <onboarding@resend.dev>" \
  --subject "hello world" \
  --segment-id 78261eea-8f8b-4381-83c6-79fa7120f1cf \
  --html "Hi {{{contact.first_name|there}}}, you can unsubscribe here: {{{RESEND_UNSUBSCRIBE_URL}}}" \
  --send \
  --scheduled-at "in 1 hour"

Response

{
  "object": "broadcast",
  "id": "49a3999c-0ce1-4ea6-ab68-afcd6dc2e794"
}