diff --git a/data/available_proxies.json b/data/available_proxies.json
new file mode 100644
index 0000000..4284dee
--- /dev/null
+++ b/data/available_proxies.json
@@ -0,0 +1,80 @@
+[
+    {
+        "type": "stateless",
+        "provider": "scrapeops",
+        "url": "https://proxy.scrapeops.io/v1/?api_key={api_key}&url={url}&render_js={render_js}&residential={residential}&country={country}&keep_headers={keep_headers}",
+        "documentation": "https://scrapeops.io?fpr=namhyeon75"
+    },
+    {
+        "type": "stateful",
+        "provider": "scrapeops",
+        "url": "http://scrapeops:{api_key}@residential-proxy.scrapeops.io:8181",
+        "documentation": "https://scrapeops.io?fpr=namhyeon75"
+    },
+    {
+        "type": "serp",
+        "provider": "searchapi",
+        "url": "https://www.searchapi.io/api/v1/search?api_key={api_key}&engine={engine}&q={q}",
+        "documentation": "https://www.searchapi.io/?via=namhyeon"
+    },
+    {
+        "type": "serp",
+        "provider": "librey",
+        "url": "https://serp.catswords.net/librex/api.php?q={q}&p=1&t=0",
+        "documentation": "https://github.com/Ahwxorg/LibreY"
+    },
+    {
+        "type": "serp",
+        "provider": "invidious",
+        "url": "https://invidious.jing.rocks/invidious/api/v1/search?q={q}",
+        "documentation": "https://docs.invidious.io/instances/"
+    },
+    {
+        "type": "stateless-jsonrpc2",
+        "provider": "github.com/gnh1201/caterpillar",
+        "url": "http://localhost:8080",
+        "documentation": "https://github.com/gnh1201/caterpillar"
+    },
+    {
+        "type": "stateful",
+        "provider": "github.com/gnh1201/caterpillar",
+        "url": "http://localhost:5555",
+        "documentation": "https://github.com/gnh1201/caterpillar"
+    },
+    {
+        "type": "stateful",
+        "provider": "cloudflare",
+        "url": "http://localhost:40000",
+        "documentation": "https://developers.cloudflare.com/warp-client/warp-modes/"
+    },
+    {
+        "type": "stateful",
+        "provider": "fiddler",
+        "url": "http://localhost:8888",
+        "documentation": "https://www.telerik.com/fiddler/fiddler-classic"
+    },
+    {
+        "type": "stateful",
+        "provider": "fiddler2",
+        "url": "http://localhost:8866",
+        "documentation": "https://www.telerik.com/fiddler/fiddler-everywhere"
+    },
+    {
+        "type": "stateful",
+        "provider": "mitmproxy",
+        "url": "http://localhost:8080",
+        "documetation": "https://mitmproxy.org/"
+    },
+    {
+        "type": "stateful",
+        "provider": "burpsuite",
+        "url": "http://localhost:8080",
+        "documetation": "https://portswigger.net/burp"
+    },
+    {
+        "type": "stateful",
+        "provider": "zaproxy",
+        "url": "http://localhost:8080",
+        "documetation": "https://www.zaproxy.org/"
+    }
+]
\ No newline at end of file
diff --git a/lib/http.js b/lib/http.js
index 7932ae1..8189f21 100644
--- a/lib/http.js
+++ b/lib/http.js
@@ -1,5 +1,5 @@
 // http.js
-// HTTP Client for WelsonJS framework
+// HTTP REST API client for WelsonJS framework
 // Namhyeon Go (Catswords Research) <abuse@catswords.net>
 // https://github.com/gnh1201/welsonjs
 var SYS = require("lib/system");
@@ -9,92 +9,19 @@ var RAND = require("lib/rand");
 var BASE64 = require("lib/base64");
 var PipeIPC = require("lib/pipe-ipc");
 var JsonRpc2 = require("lib/jsonrpc2");
+var SERP = require("lib/serp");
 
 var OS_NAME = SYS.getOS();
-var OS_ARCH = SYS.getArch();
 var DEVICE_UUID = SYS.getUUID();
 var PROCESS_VERSION = SYS.getProcessVersion();
-var DEFAULT_USER_AGENT = "WelsonJS/0.2.7 (" + OS_NAME + "; " + OS_ARCH + "; " + PROCESS_VERSION + "; " + DEVICE_UUID + "; abuse@catswords.net)";
+var DEFAULT_USER_AGENT = "WelsonJS/0.2.7 (" + OS_NAME + "; " + PROCESS_VERSION + "; " + DEVICE_UUID + ")";
 
-// If you have any suggestions for partnerships, please contact us at: abuse@catswords.net
 var AVAILABLE_PROXIES = [
     {
-        "type": "stateless",
-        "provider": "scrapeops",
-        "url": "https://proxy.scrapeops.io/v1/?api_key={api_key}&url={url}&render_js={render_js}&residential={residential}&country={country}&keep_headers={keep_headers}",
-        "documentation": "https://scrapeops.io?fpr=namhyeon75"
-    },
-    {
-        "type": "stateful",
-        "provider": "scrapeops",
-        "url": "http://scrapeops:{api_key}@residential-proxy.scrapeops.io:8181",
-        "documentation": "https://scrapeops.io?fpr=namhyeon75"
-    },
-    {
-        "type": "serp",
-        "provider": "searchapi",
-        "url": "https://www.searchapi.io/api/v1/search?api_key={api_key}&engine={engine}&q={q}",
-        "documentation": "https://www.searchapi.io/?via=namhyeon"
-    },
-    {
-        "type": "serp",
-        "provider": "librey",
-        "url": "https://serp.catswords.net/librex/api.php?q={q}&p=1&t=0",
-        "documentation": "https://github.com/Ahwxorg/LibreY"
-    },
-    {
-        "type": "serp",
-        "provider": "invidious",
-        "url": "https://invidious.jing.rocks/invidious/api/v1/search?q={q}",
-        "documentation": "https://docs.invidious.io/instances/"
-    },
-    {
-        "type": "stateless-jsonrpc2",
-        "provider": "github.com/gnh1201/caterpillar",
-        "url": "http://localhost:8080",
-        "documentation": "https://github.com/gnh1201/caterpillar"
-    },
-    {
-        "type": "stateful",
-        "provider": "github.com/gnh1201/caterpillar",
-        "url": "http://localhost:5555",
-        "documentation": "https://github.com/gnh1201/caterpillar"
-    },
-    {
-        "type": "stateful",
-        "provider": "cloudflare",
-        "url": "http://localhost:40000",
-        "documentation": "https://developers.cloudflare.com/warp-client/warp-modes/"
-    },
-    {
-        "type": "stateful",
-        "provider": "fiddler",
-        "url": "http://localhost:8888",
-        "documentation": "https://www.telerik.com/fiddler/fiddler-classic"
-    },
-    {
-        "type": "stateful",
-        "provider": "fiddler2",
-        "url": "http://localhost:8866",
-        "documentation": "https://www.telerik.com/fiddler/fiddler-everywhere"
-    },
-    {
-        "type": "stateful",
-        "provider": "mitmproxy",
-        "url": "http://localhost:8080",
-        "documetation": "https://mitmproxy.org/"
-    },
-    {
-        "type": "stateful",
-        "provider": "burpsuite",
-        "url": "http://localhost:8080",
-        "documetation": "https://portswigger.net/burp"
-    },
-    {
-        "type": "stateful",
-        "provider": "zaproxy",
-        "url": "http://localhost:8080",
-        "documetation": "https://www.zaproxy.org/"
+        "type": "file",
+        "provider": "",
+        "url": "data/available_proxies.json",
+        "documentation": ""
     }
 ];
 
@@ -554,7 +481,7 @@ var HTTPObject = function(engine) {
         if (!this.proxy.enabled) return url;
 
         if (this.proxy.type == "serp") {
-            var serp = this.parseSerpUrl(url);
+            var serp = SERP.parseUrl(url);
             this.setVariable("engine", serp.engine);
             this.setVariable("q", encodeURIComponent(serp.keyword));
         }
@@ -567,60 +494,6 @@ var HTTPObject = function(engine) {
         return url;
     };
 
-    this.parseSerpUrl = function(url) {
-        var getEngine = function(url) {
-            var defaultEngine = "google";
-            var engines = {
-                "google": ["naver", "daum"],
-                "google_shopping": [
-                    "aliexpress", "temu", "coupang", "shopping.naver",
-                    "ssg", "gmarket", "11st", "store.kakao",
-                    "lotteon", "tmon", "wemakeprice"
-                ],
-                "default": [
-                    "google", "youtube", "bing", "baidu",
-                    "amazon", "duckduckgo"
-                ]
-            };
-
-            var match = url.match(/^(?:https?:\/\/)?(?:www\.)?([\w.-]+)\.\w+$/);
-            if (!match) {
-                return defaultEngine;
-            }
-
-            var domain = match[1];
-
-            for (var key in engines) {
-                if (engines.hasOwnProperty(key)) {
-                    var group = engines[key];
-                    if (group.indexOf(domain) !== -1) {
-                        if (key === "default") {
-                            return domain;
-                        }
-                        return key;
-                    }
-                }
-            }
-
-            return defaultEngine;
-        };
-
-        var getKeyword = function(url) {
-            var regex = /[?&](q|wd|query|keyword|search_query|k|SearchText|search_key)=([^&]*)/g;
-            //var regex = /(?:[?&](q|wd|keyword|query|search_query|k|SearchText|search_key)=|\/pdsearch\/)([^&?]*)/g;
-            var match, keywords = [];
-            while ((match = regex.exec(url)) !== null) {
-                keywords.push(match[2]);
-            }
-            return keywords.join(' ');
-        };
-
-        return {
-            "engine": getEngine(url),
-            "keyword": getKeyword(url)
-        }
-    };
-
     this.open = function(method, url) {
         var url = this.serializeParameters(url);
 
@@ -1312,6 +1185,25 @@ function parseURL(url) {
     };
 }
 
+// Check an available proxies
+AVAILABLE_PROXIES.forEach(function(proxy) {
+    if (proxy.type == "file") {
+        if (FILE.fileExists(proxy.url)) {
+            try {
+                var fileContents = FILE.readFile(proxy.url, FILE.CdoCharset.CdoUTF_8);
+                var data = JSON.parse(fileContents);
+                data.forEach(function(x) {
+                    AVAILABLE_PROXIES.push(x);
+                });
+            } catch (e) {
+                console.warn(proxy.url, "is not a valid file");
+            }
+        } else {
+            console.warn(proxy.url, "does not exists");
+        }
+    }
+});
+
 exports.create = create;
 exports.get = get;
 exports.post = post;
@@ -1323,7 +1215,7 @@ exports.parseURL = parseURL;
 exports.DEFAULT_USER_AGENT = DEFAULT_USER_AGENT;
 exports.defaultUserAgent = DEFAULT_USER_AGENT;    // compatible
 
-exports.VERSIONINFO = "HTTP Client for WelsonJS framework (http.js) version 0.7.44";
+exports.VERSIONINFO = "HTTP REST API client for WelsonJS framework (http.js) version 0.7.45";
 exports.AUTHOR = "abuse@catswords.net";
 exports.global = global;
 exports.require = global.require;
diff --git a/lib/serp.js b/lib/serp.js
new file mode 100644
index 0000000..405eea5
--- /dev/null
+++ b/lib/serp.js
@@ -0,0 +1,64 @@
+// serp.js
+// SERP/SEO tools integration for WelsonJS framework
+// Namhyeon Go <abuse@catswords.net>
+// https://github.com/gnh1201/welsonjs
+function parseUrl(url) {
+    var getEngine = function(url) {
+        var defaultEngine = "google";
+        var engines = {
+            "google": ["naver", "daum"],
+            "google_shopping": [
+                "aliexpress", "temu", "coupang", "shopping.naver",
+                "ssg", "gmarket", "11st", "store.kakao",
+                "lotteon", "tmon", "wemakeprice"
+            ],
+            "default": [
+                "google", "youtube", "bing", "baidu",
+                "amazon", "duckduckgo"
+            ]
+        };
+
+        var match = url.match(/^(?:https?:\/\/)?(?:www\.)?([\w.-]+)\.\w+$/);
+        if (!match) {
+            return defaultEngine;
+        }
+
+        var domain = match[1];
+
+        for (var key in engines) {
+            if (engines.hasOwnProperty(key)) {
+                var group = engines[key];
+                if (group.indexOf(domain) !== -1) {
+                    if (key === "default") {
+                        return domain;
+                    }
+                    return key;
+                }
+            }
+        }
+
+        return defaultEngine;
+    };
+
+    var getKeyword = function(url) {
+        var regex = /[?&](q|wd|query|keyword|search_query|k|SearchText|search_key)=([^&]*)/g;
+        //var regex = /(?:[?&](q|wd|keyword|query|search_query|k|SearchText|search_key)=|\/pdsearch\/)([^&?]*)/g;
+        var match, keywords = [];
+        while ((match = regex.exec(url)) !== null) {
+            keywords.push(match[2]);
+        }
+        return keywords.join(' ');
+    };
+
+    return {
+        "engine": getEngine(url),
+        "keyword": getKeyword(url)
+    }
+};
+
+exports.parseUrl = parseUrl;
+
+exports.VERSIONINFO = "SERP/SEO tools integration (serp.js) version 0.1";
+exports.AUTHOR = "abuse@catswords.net";
+exports.global = global;
+exports.require = global.require;