POST
/
emails
/
batch
import { Resend } from 'resend';

const resend = new Resend('re_xxxxxxxxx');

const { data, error } = await resend.batch.send([
  {
    from: 'Acme <onboarding@resend.dev>',
    to: ['foo@gmail.com'],
    subject: 'hello world',
    html: '<h1>it works!</h1>',
  },
  {
    from: 'Acme <onboarding@resend.dev>',
    to: ['bar@outlook.com'],
    subject: 'world hello',
    html: '<p>it works!</p>',
  },
]);

{
  "data": [
    {
      "id": "ae2014de-c168-4c61-8267-70d2662a1ce1"
    },
    {
      "id": "faccb7a5-8a28-4e9a-ac64-8da1cc3bc1cb"
    }
  ]
}
Instead of sending one email per HTTP request, we provide a batching endpoint that permits you to send up to 100 emails in a single API call.

​
Body Parameters

​
from
string
required
Sender email address.To include a friendly name, use the format "Your Name <sender@domain.com>".
​
to
string | string[]
required
Recipient email address. For multiple addresses, send as an array of strings. Max 50.
​
subject
string
required
Email subject.
​
bcc
string | string[]
Bcc recipient email address. For multiple addresses, send as an array of strings.
​
cc
string | string[]
Cc recipient email address. For multiple addresses, send as an array of strings.
​
reply_to
string | string[]
Reply-to email address. For multiple addresses, send as an array of strings.
Because each SDK follows language conventions, check your SDK example for the proper casing of this parameter.
​
html
string
The HTML version of the message.
​
text
string
The plain text version of the message.
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.
​
headers
object
Custom headers to add to the email.

​
Headers

​
Idempotency-Key
string
Add an idempotency key to prevent duplicated emails.
  • Should be unique per API request
  • Idempotency keys expire after 24 hours
  • Have a maximum length of 256 characters
Learn more

​
Limitations

The attachments, tags, and scheduled_at fields are not supported yet. 
import { Resend } from 'resend';

const resend = new Resend('re_xxxxxxxxx');

const { data, error } = await resend.batch.send([
  {
    from: 'Acme <onboarding@resend.dev>',
    to: ['foo@gmail.com'],
    subject: 'hello world',
    html: '<h1>it works!</h1>',
  },
  {
    from: 'Acme <onboarding@resend.dev>',
    to: ['bar@outlook.com'],
    subject: 'world hello',
    html: '<p>it works!</p>',
  },
]);

{
  "data": [
    {
      "id": "ae2014de-c168-4c61-8267-70d2662a1ce1"
    },
    {
      "id": "faccb7a5-8a28-4e9a-ac64-8da1cc3bc1cb"
    }
  ]
}