List Contact Segments

Retrieve a list of segments that a contact is part of.

Path Parameters

Either id or email must be provided.

id (string) — The Contact ID.
email (string) — The Contact Email.

Query Parameters

  {isRequired ?

limit (number) — Number of segments to retrieve.
- Default value: 20
- Maximum value: 100
- Minimum value: 1

: <>

Note that the limit parameter is optional. If you do not provide a limit, all segments will be returned in a single response.

limit (number) — Number of segments to retrieve.
- Maximum value: 100
- Minimum value: 1
```
</>}
```
  - after (string) — The ID after which we'll retrieve more segments (for pagination). This ID will not be included in the returned list. Cannot be used with the before parameter.
  - before (string) — The ID before which we'll retrieve more segments (for pagination). This ID will not be included in the returned list. Cannot be used with the after parameter.
    
    You can only use either after or before parameter, not both. See our pagination guide for more information.
  </>

Node.js

import { Resend } from 'resend';

const resend = new Resend('re_xxxxxxxxx');

const { data, error } = await resend.contacts.segments.list({
  contactId: 'e169aa45-1ecf-4183-9955-b1499d5701d3',
});

PHP

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

$resend->contacts->segments->list(
  contactId: 'e169aa45-1ecf-4183-9955-b1499d5701d3'
);

Python

import resend

resend.api_key = 're_xxxxxxxxx'

params: resend.Contacts.Segments.ListParams = {
    "contact_id": 'e169aa45-1ecf-4183-9955-b1499d5701d3',
}

segments = resend.Contacts.Segments.list(params)

Ruby

require 'resend'

Resend.api_key = 're_xxxxxxxxx'

segments = Resend::Contacts::Segments.list(
  contact_id: 'e169aa45-1ecf-4183-9955-b1499d5701d3'
)

package main

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

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

	listParams := &resend.ListContactSegmentsRequest{
		ContactId: "479e3145-dd38-476b-932c-529ceb705947",
	}

	client.Contacts.Segments.List(listParams)
}

Rust

use resend_rs::{Resend, Result, list_opts::ListOptions};

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

  let _contacts = resend
    .contacts
    .list_contact_segment(
      "e169aa45-1ecf-4183-9955-b1499d5701d3",
      ListOptions::default()
    )
    .await?;

  Ok(())
}

Java

import com.resend.Resend;
import com.resend.core.exception.ResendException;

public class Main {
  public static void main(String[] args) throws ResendException {
    Resend resend = new Resend("re_xxxxxxxxx");

    resend.contacts().segments().list("e169aa45-1ecf-4183-9955-b1499d5701d3");
  }
}

.NET

using Resend;

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

var resp = await resend.ContactListSegmentsAsync( new Guid( "e169aa45-1ecf-4183-9955-b1499d5701d3" ));
Console.WriteLine( "Nr Segments={0}", resp.Content.Data.Count );

cURL

curl -X GET 'https://api.resend.com/contacts/e169aa45-1ecf-4183-9955-b1499d5701d3/segments' \
     -H 'Authorization: Bearer re_xxxxxxxxx'

CLI

resend contacts segments e169aa45-1ecf-4183-9955-b1499d5701d3

Response

{
  "object": "list",
  "data": [
    {
      "id": "78261eea-8f8b-4381-83c6-79fa7120f1cf",
      "name": "Registered Users",
      "created_at": "2026-10-06 22:59:55.977+00"
    }
  ],
  "has_more": false
}