diff --git a/package-lock.json b/package-lock.json
index c17ace8c0..1bdf3e205 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -32,7 +32,6 @@
                 "mime-types": "^2.1.35",
                 "multer": "^1.4.5-lts.1",
                 "node-fetch": "^2.6.11",
-                "node-rest-client": "^3.1.1",
                 "open": "^8.4.2",
                 "piexifjs": "^1.0.6",
                 "png-chunk-text": "^1.0.0",
@@ -2272,40 +2271,6 @@
                 }
             }
         },
-        "node_modules/node-rest-client": {
-            "version": "3.1.1",
-            "resolved": "https://registry.npmjs.org/node-rest-client/-/node-rest-client-3.1.1.tgz",
-            "integrity": "sha512-O8RUGGhGLLbzlL7SFOBza1AgUWP3uITv4mas4f5Q7A87HAy6qtYpa8Sj5x4UG9cDf4374v7lWyvgWladI04zzQ==",
-            "dependencies": {
-                "debug": "~4.3.3",
-                "follow-redirects": ">=1.14.7",
-                "xml2js": ">=0.4.23"
-            },
-            "engines": {
-                "node": "*"
-            }
-        },
-        "node_modules/node-rest-client/node_modules/debug": {
-            "version": "4.3.4",
-            "resolved": "https://registry.npmjs.org/debug/-/debug-4.3.4.tgz",
-            "integrity": "sha512-PRWFHuSU3eDtQJPvnNY7Jcket1j0t5OuOsFzPPzsekD52Zl8qUfFIPEiswXqIvHWGVHOgX+7G/vCNNhehwxfkQ==",
-            "dependencies": {
-                "ms": "2.1.2"
-            },
-            "engines": {
-                "node": ">=6.0"
-            },
-            "peerDependenciesMeta": {
-                "supports-color": {
-                    "optional": true
-                }
-            }
-        },
-        "node_modules/node-rest-client/node_modules/ms": {
-            "version": "2.1.2",
-            "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.2.tgz",
-            "integrity": "sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w=="
-        },
         "node_modules/object-assign": {
             "version": "4.1.1",
             "resolved": "https://registry.npmjs.org/object-assign/-/object-assign-4.1.1.tgz",
diff --git a/package.json b/package.json
index 5b34e155e..f3a1019e9 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,6 @@
         "mime-types": "^2.1.35",
         "multer": "^1.4.5-lts.1",
         "node-fetch": "^2.6.11",
-        "node-rest-client": "^3.1.1",
         "open": "^8.4.2",
         "piexifjs": "^1.0.6",
         "png-chunk-text": "^1.0.0",
diff --git a/server.js b/server.js
index 21fb4ac93..4576e268c 100644
--- a/server.js
+++ b/server.js
@@ -38,7 +38,6 @@ const fetch = require('node-fetch').default;
 const ipaddr = require('ipaddr.js');
 const ipMatching = require('ip-matching');
 const json5 = require('json5');
-const RESTClient = require('node-rest-client').Client;
 const WebSocket = require('ws');
 
 // image processing related library imports
@@ -154,12 +153,6 @@ function getHordeClient() {
     return ai_horde;
 }
 
-const restClient = new RESTClient();
-
-restClient.on('error', (err) => {
-    console.error('An error occurred:', err);
-});
-
 const API_NOVELAI = "https://api.novelai.net";
 const API_OPENAI = "https://api.openai.com/v1";
 const API_CLAUDE = "https://api.anthropic.com/v1";
@@ -812,13 +805,13 @@ app.post("/getstatus", jsonParser, async function (request, response) {
 
     if (main_api == "kobold") {
         try {
-            version = (await getAsync(api_server + "/v1/info/version")).result;
+            version = (await fetchJSON(api_server + "/v1/info/version")).result
         }
         catch {
             version = '0.0.0';
         }
         try {
-            koboldVersion = (await getAsync(api_server + "/extra/version"));
+            koboldVersion = (await fetchJSON(api_server + "/extra/version"));
         }
         catch {
             koboldVersion = {
@@ -829,7 +822,7 @@ app.post("/getstatus", jsonParser, async function (request, response) {
     }
 
     try {
-        let data = await getAsync(url, args);
+        let data = await fetchJSON(url, args);
 
         if (!data || typeof data !== 'object') {
             data = {};
@@ -3094,6 +3087,8 @@ async function generateThumbnail(type, file) {
 }
 
 app.get('/thumbnail', jsonParser, async function (request, response) {
+    if (typeof request.query.file !== 'string' || typeof request.query.type !== 'string') return response.sendStatus(400);
+
     const type = request.query.type;
     const file = sanitize(request.query.file);
 
@@ -3111,7 +3106,9 @@ app.get('/thumbnail', jsonParser, async function (request, response) {
     }
 
     if (config.disableThumbnails == true) {
-        const pathToOriginalFile = path.join(getOriginalFolder(type), file);
+        let folder = getOriginalFolder(file)
+        if (folder === undefined) return response.sendStatus(400);
+        const pathToOriginalFile = path.join(folder, file);
         return response.sendFile(pathToOriginalFile, { root: process.cwd() });
     }
 
@@ -3848,10 +3845,9 @@ app.post("/delete_preset", jsonParser, function (request, response) {
 });
 
 app.post("/savepreset_openai", jsonParser, function (request, response) {
+    if (!request.body || typeof request.query.name !== 'string') return response.sendStatus(400);
     const name = sanitize(request.query.name);
-    if (!request.body || !name) {
-        return response.sendStatus(400);
-    }
+    if (!name) return response.sendStatus(400);
 
     const filename = `${name}.settings`;
     const fullpath = path.join(directories.openAI_Settings, filename);
@@ -3994,8 +3990,14 @@ app.post("/tokenize_via_api", jsonParser, async function (request, response) {
 
 // ** REST CLIENT ASYNC WRAPPERS **
 
-async function postAsync(url, args) {
-    const response = await fetch(url, { method: 'POST', timeout: 0, ...args });
+/**
+ * Convenience function for fetch requests (default GET) returning as JSON.
+ * @param {string} url
+ * @param {import('node-fetch').RequestInit} args
+ */
+async function fetchJSON(url, args = {}) {
+    if (args.method === undefined) args.method = 'GET';
+    const response = await fetch(url, args);
 
     if (response.ok) {
         const data = await response.json();
@@ -4004,17 +4006,13 @@ async function postAsync(url, args) {
 
     throw response;
 }
+/**
+ * Convenience function for fetch requests (default POST with no timeout) returning as JSON.
+ * @param {string} url
+ * @param {import('node-fetch').RequestInit} args
+ */
+async function postAsync(url, args) { return fetchJSON(url, { method: 'POST', timeout: 0, ...args }) }
 
-function getAsync(url, args) {
-    return new Promise((resolve, reject) => {
-        restClient.get(url, args, (data, response) => {
-            if (response.statusCode >= 400) {
-                reject(data);
-            }
-            resolve(data);
-        }).on('error', e => reject(e));
-    })
-}
 // ** END **
 
 const tavernUrl = new URL(
@@ -4288,10 +4286,10 @@ app.post('/generate_horde', jsonParser, async (request, response) => {
         "body": JSON.stringify(request.body),
         "headers": {
             "Content-Type": "application/json",
-            "Client-Agent": request.header('Client-Agent'),
             "apikey": api_key_horde,
         }
     };
+    if (request.header('Client-Agent') !== undefined) args.headers['Client-Agent'] = request.header('Client-Agent');
 
     console.log(args.body);
     try {