diff --git a/cf_list_create.js b/cf_list_create.js
index 87d86db..bdef4eb 100644
--- a/cf_list_create.js
+++ b/cf_list_create.js
@@ -1,6 +1,6 @@
 import fs from 'fs';
 import { DRY_RUN, LIST_ITEM_LIMIT } from './lib/constants.js';
-import { createZeroTrustLists } from './lib/helpers.js';
+import { createZeroTrustLists } from './lib/api.js';
 
 if (!process.env.CI) console.log(`List item limit set to ${LIST_ITEM_LIMIT}`);
 
diff --git a/lib/api.js b/lib/api.js
new file mode 100644
index 0000000..bd5cbfd
--- /dev/null
+++ b/lib/api.js
@@ -0,0 +1,81 @@
+import { FAST_MODE, LIST_ITEM_SIZE } from "./constants.js";
+import { requestGateway } from "./helpers.js";
+
+/**
+ * Creates a Zero Trust list.
+ *
+ * API docs: https://developers.cloudflare.com/api/operations/zero-trust-lists-create-zero-trust-list
+ * @param {string} name The name of the list.
+ * @param {Object[]} items The domains in the list.
+ * @param {string} items[].value The domain of an entry.
+ * @returns {Promise}
+ */
+const createZeroTrustList = (name, items) =>
+  requestGateway(`/lists`, {
+    method: "POST",
+    body: JSON.stringify({
+      name,
+      type: "DOMAIN",
+      items,
+    }),
+  });
+
+/**
+ * Creates Zero Trust lists sequentially.
+ * @param {string[]} items The domains.
+ */
+const createZeroTrustListsOneByOne = async (items) => {
+  let totalListNumber = Math.ceil(items.length / LIST_ITEM_SIZE);
+
+  for (let i = 0, listNumber = 1; i < items.length; i += LIST_ITEM_SIZE) {
+    const chunk = items
+      .slice(i, i + LIST_ITEM_SIZE)
+      .map((item) => ({ value: item }));
+    const listName = `CGPS List - Chunk ${listNumber}`;
+
+    try {
+      await createZeroTrustList(listName, chunk);
+      await sleep();
+      totalListNumber--;
+      listNumber++;
+      console.log(`Created ${listName} list - ${totalListNumber} left`);
+    } catch (err) {
+      console.error(`Could not create ${listName} - ${err.toString()}`);
+    }
+  }
+};
+
+/**
+ * Creates all Zero Trust lists at once.
+ * @param {string[]} items The domains.
+ */
+const createZeroTrustListsAtOnce = async (items) => {
+  const totalListNumber = Math.ceil(items.length / LIST_ITEM_SIZE);
+  const requests = [];
+
+  for (let i = 0, listNumber = 1; i < items.length; i += LIST_ITEM_SIZE) {
+    const chunk = items
+      .slice(i, i + LIST_ITEM_SIZE)
+      .map((item) => ({ value: item }));
+    const listName = `CGPS List - Chunk ${listNumber}`;
+
+    requests.push(createZeroTrustList(listName, chunk));
+    listNumber++;
+  }
+
+  await Promise.all(requests);
+  console.log(`Created ${totalListNumber} lists`);
+};
+
+/**
+ * Create Zero Trust lists.
+ * @param {string[]} items The domains.
+ * @returns {Promise<void>}
+ */
+export const createZeroTrustLists = (items) => {
+  if (FAST_MODE) {
+    return createZeroTrustListsAtOnce(items);
+  }
+
+  return createZeroTrustListsOneByOne(items);
+};
diff --git a/lib/constants.js b/lib/constants.js
index 9b528f3..5a77df5 100644
--- a/lib/constants.js
+++ b/lib/constants.js
@@ -1,10 +1,6 @@
-import { isDev } from "./utils.js";
+import dotenv from "dotenv";
 
-if (isDev()) {
-  const dotenv = await import("dotenv");
-
-  dotenv.config();
-}
+dotenv.config();
 
 export const API_TOKEN = process.env.CLOUDFLARE_API_KEY;
 
diff --git a/lib/helpers.js b/lib/helpers.js
index 15e23d0..69ea096 100644
--- a/lib/helpers.js
+++ b/lib/helpers.js
@@ -1,16 +1,13 @@
-import {
-  ACCOUNT_EMAIL,
-  ACCOUNT_ID,
-  API_HOST,
-  API_TOKEN,
-  FAST_MODE,
-  LIST_ITEM_SIZE,
-} from "./constants.js";
-import { sleep } from "./utils.js";
+import { ACCOUNT_EMAIL, ACCOUNT_ID, API_HOST, API_TOKEN } from "./constants.js";
 
+/**
+ * Fires request to the specified URL.
+ * @param {string} url The URL to which the request will be fired.
+ * @param {RequestInit} options The options to be passed to `fetch`.
+ * @returns {Promise}
+ */
 const request = async (url, options) => {
   const response = await fetch(url, {
-    method: "GET",
     headers: {
       Authorization: `Bearer ${API_TOKEN}`,
       "Content-Type": "application/json",
@@ -23,62 +20,11 @@ const request = async (url, options) => {
   return response.json();
 };
 
-const createZeroTrustList = (name, items) => {
-  // https://developers.cloudflare.com/api/operations/zero-trust-lists-create-zero-trust-list
-
-  return request(`${API_HOST}/accounts/${ACCOUNT_ID}/gateway/lists`, {
-    method: "POST",
-    body: JSON.stringify({
-      name,
-      type: "DOMAIN",
-      items,
-    }),
-  });
-};
-
-const createZeroTrustListsOneByOne = async (items) => {
-  let totalListNumber = Math.ceil(items.length / LIST_ITEM_SIZE);
-
-  for (let i = 0, listNumber = 1; i < items.length; i += LIST_ITEM_SIZE) {
-    const chunk = items
-      .slice(i, i + LIST_ITEM_SIZE)
-      .map((item) => ({ value: item }));
-    const listName = `CGPS List - Chunk ${listNumber}`;
-
-    try {
-      await createZeroTrustList(listName, chunk);
-      await sleep();
-      totalListNumber--;
-      listNumber++;
-      console.log(`Created ${listName} list - ${totalListNumber} left`);
-    } catch (err) {
-      console.error(`Could not create ${listName} - ${err.toString()}`);
-    }
-  }
-};
-
-const createZeroTrustListsAtOnce = async (items) => {
-  let totalListNumber = Math.ceil(items.length / LIST_ITEM_SIZE);
-  const requests = [];
-
-  for (let i = 0, listNumber = 1; i < items.length; i += LIST_ITEM_SIZE) {
-    const chunk = items
-      .slice(i, i + LIST_ITEM_SIZE)
-      .map((item) => ({ value: item }));
-    const listName = `CGPS List - Chunk ${listNumber}`;
-
-    requests.push(createZeroTrustList(listName, chunk));
-    listNumber++;
-  }
-
-  await Promise.all(requests);
-  console.log(`Created ${totalListNumber} lists`);
-};
-
-export const createZeroTrustLists = (items) => {
-  if (FAST_MODE) {
-    return createZeroTrustListsAtOnce(items);
-  }
-
-  return createZeroTrustListsOneByOne(items);
-};
+/**
+ * Fires request to the Zero Trust gateway.
+ * @param {string} path The path which will be appended to the request URL.
+ * @param {RequestInit} options The options to be passed to `fetch`.
+ * @returns {Promise}
+ */
+export const requestGateway = (path, options) =>
+  request(`${API_HOST}/accounts/${ACCOUNT_ID}/gateway${path}`, options);
diff --git a/lib/utils.js b/lib/utils.js
index f717822..9c1037f 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -1,4 +1,6 @@
-export const isDev = () => process.env.NODE_ENV !== "production";
-
+/**
+ * Sleeps for a specified amount of time.
+ * @param {number} [ms=350] The amount of time in ms.
+ */
 export const sleep = (ms = 350) =>
   new Promise((resolve) => setTimeout(resolve, ms));