List subscribers

GET/api/v2/lists/:id/subscribers

status is one of pending (waiting for double opt-in), active or unsubscribed.

Needs an API key with the read or newsletter scope. Scopes

Parameters

Path

idstringrequired

The list id.

Query

statusstring

Only subscribers with this status.One of pending, active, unsubscribed.

limitnumberdefault 100

Page size. Default 100.

offsetnumber

How many to skip.

curl -X GET "https://api.koltrix.com/api/v2/lists/0b3c6d2e-91f4-4a7b-8c5d-2e3f4a5b6c7d/subscribers?status=active&limit=100&offset=0" \
  -H "Authorization: Bearer $KOLTRIX_API_KEY"

const res = await fetch("https://api.koltrix.com/api/v2/lists/0b3c6d2e-91f4-4a7b-8c5d-2e3f4a5b6c7d/subscribers?status=active&limit=100&offset=0", {
  method: "GET",
  headers: {
    Authorization: `Bearer ${process.env.KOLTRIX_API_KEY}`,
  },
});

console.log(res.status, await res.json());

import os, requests

res = requests.get(
    "https://api.koltrix.com/api/v2/lists/0b3c6d2e-91f4-4a7b-8c5d-2e3f4a5b6c7d/subscribers?status=active&limit=100&offset=0",
    headers={
        "Authorization": f"Bearer {os.environ['KOLTRIX_API_KEY']}",
    },
)
print(res.status_code, res.json())

package main

import (
	"fmt"
	"io"
	"net/http"
	"os"
)

func main() {
	req, _ := http.NewRequest("GET", "https://api.koltrix.com/api/v2/lists/0b3c6d2e-91f4-4a7b-8c5d-2e3f4a5b6c7d/subscribers?status=active&limit=100&offset=0", nil)
	req.Header.Set("Authorization", "Bearer "+os.Getenv("KOLTRIX_API_KEY"))

	res, err := http.DefaultClient.Do(req)
	if err != nil {
		panic(err)
	}
	defer res.Body.Close()
	out, _ := io.ReadAll(res.Body)
	fmt.Println(res.StatusCode, string(out))
}

<?php

$ch = curl_init("https://api.koltrix.com/api/v2/lists/0b3c6d2e-91f4-4a7b-8c5d-2e3f4a5b6c7d/subscribers?status=active&limit=100&offset=0");
curl_setopt_array($ch, [
    CURLOPT_CUSTOMREQUEST => "GET",
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_HTTPHEADER => [
        "Authorization: Bearer " . getenv("KOLTRIX_API_KEY"),
    ],
]);

$response = curl_exec($ch);
echo curl_getinfo($ch, CURLINFO_HTTP_CODE), " ", $response;

Success.

{
  "data": [
    {
      "id": "9d8c7b6a-5f4e-4d3c-b2a1-0f9e8d7c6b5a",
      "list_id": "0b3c6d2e-91f4-4a7b-8c5d-2e3f4a5b6c7d",
      "email": "[email protected]",
      "name": "Ada Lovelace",
      "status": "active",
      "unsubscribe_token": "4f9a0c1d2e3b4a5f6c7d8e9f0a1b2c3d",
      "tags": [
        "beta"
      ],
      "created_at": "2026-09-20T14:01:00Z",
      "updated_at": "2026-09-20T14:01:00Z"
    }
  ],
  "total": 1
}

The API key is missing, malformed, unknown or revoked.

{
  "error": "invalid or revoked api key"
}

The key is valid but does not have the newsletter scope.

{
  "error": "missing permission: newsletter"
}

More than 60 requests a minute on this key. Wait Retry-After seconds. No code field.

Retry-After: 60

{
  "error": "rate limit exceeded — 60 requests per minute per API key"
}

Try it below with your own key. Every sample reads the key from KOLTRIX_API_KEY.

Try it

Send this request from your browser.

Input

What you send

API key

Stays in this browser tab (sessionStorage) and goes only to api.koltrix.com. Create one under Settings → API keys.

Requests are real. Koltrix has no test mode, so use a dedicated key with only the permissions you need and revoke it when you are done.

idstringrequired

statusstring

limitnumber

offsetnumber

GEThttps://api.koltrix.com/api/v2/lists/0b3c6d2e-91f4-4a7b-8c5d-2e3f4a5b6c7d/subscribers?status=active&limit=100&offset=0

Output

What comes back

The response appears here.
Press Send request.