diff --git a/open-sse/index.js b/open-sse/index.js
index fe73da0..60eb3ef 100644
--- a/open-sse/index.js
+++ b/open-sse/index.js
@@ -1,3 +1,6 @@
+// Patch global fetch with proxy support (must be first)
+import "./utils/proxyFetch.js";
+
 // Config
 export { PROVIDERS, OAUTH_ENDPOINTS, CACHE_TTL, DEFAULT_MAX_TOKENS, CLAUDE_SYSTEM_PROMPT, COOLDOWN_MS, BACKOFF_CONFIG } from "./config/constants.js";
 export { 
diff --git a/open-sse/utils/proxyFetch.js b/open-sse/utils/proxyFetch.js
new file mode 100644
index 0000000..0e4acc4
--- /dev/null
+++ b/open-sse/utils/proxyFetch.js
@@ -0,0 +1,84 @@
+
+const isCloud = typeof caches !== "undefined" && typeof caches === "object";
+
+const originalFetch = globalThis.fetch;
+let proxyAgent = null;
+let socksAgent = null;
+
+/**
+ * Get proxy URL from environment
+ */
+function getProxyUrl(targetUrl) {
+  const noProxy = process.env.NO_PROXY || process.env.no_proxy;
+  
+  if (noProxy) {
+    const hostname = new URL(targetUrl).hostname.toLowerCase();
+    const patterns = noProxy.split(",").map(p => p.trim().toLowerCase());
+    
+    const shouldBypass = patterns.some(pattern => {
+      if (pattern === "*") return true;
+      if (pattern.startsWith(".")) return hostname.endsWith(pattern) || hostname === pattern.slice(1);
+      return hostname === pattern || hostname.endsWith(`.${pattern}`);
+    });
+    
+    if (shouldBypass) return null;
+  }
+
+  const protocol = new URL(targetUrl).protocol;
+  
+  if (protocol === "https:") {
+    return process.env.HTTPS_PROXY || process.env.https_proxy || 
+           process.env.ALL_PROXY || process.env.all_proxy;
+  }
+  
+  return process.env.HTTP_PROXY || process.env.http_proxy ||
+         process.env.ALL_PROXY || process.env.all_proxy;
+}
+
+/**
+ * Create proxy agent lazily
+ */
+async function getAgent(proxyUrl) {
+  const proxyProtocol = new URL(proxyUrl).protocol;
+  
+  if (proxyProtocol === "socks:" || proxyProtocol === "socks5:" || proxyProtocol === "socks4:") {
+    if (!socksAgent) {
+      const { SocksProxyAgent } = await import("socks-proxy-agent");
+      socksAgent = new SocksProxyAgent(proxyUrl);
+    }
+    return socksAgent;
+  }
+  
+  if (!proxyAgent) {
+    const { HttpsProxyAgent } = await import("https-proxy-agent");
+    proxyAgent = new HttpsProxyAgent(proxyUrl);
+  }
+  return proxyAgent;
+}
+
+/**
+ * Patched fetch with proxy support and fallback to direct connection
+ */
+async function patchedFetch(url, options = {}) {
+  const targetUrl = typeof url === "string" ? url : url.toString();
+  const proxyUrl = getProxyUrl(targetUrl);
+  
+  if (proxyUrl) {
+    try {
+      const agent = await getAgent(proxyUrl);
+      return await originalFetch(url, { ...options, dispatcher: agent });
+    } catch (proxyError) {
+      // Fallback to direct connection if proxy fails
+      console.warn(`[ProxyFetch] Proxy failed, falling back to direct: ${proxyError.message}`);
+      return originalFetch(url, options);
+    }
+  }
+  
+  return originalFetch(url, options);
+}
+
+if (!isCloud) {
+  globalThis.fetch = patchedFetch;
+}
+
+export default isCloud ? originalFetch : patchedFetch;
diff --git a/package.json b/package.json
index 19ab009..96404ee 100644
--- a/package.json
+++ b/package.json
@@ -13,6 +13,7 @@
     "express": "^5.2.1",
     "fs": "^0.0.1-security",
     "http-proxy-middleware": "^3.0.5",
+    "https-proxy-agent": "^7.0.6",
     "jose": "^6.1.3",
     "lowdb": "^7.0.1",
     "next": "^15.2.0",
@@ -21,6 +22,7 @@
     "ora": "^5.4.1",
     "react": "19.2.1",
     "react-dom": "19.2.1",
+    "socks-proxy-agent": "^8.0.4",
     "undici": "^7.16.0",
     "uuid": "^13.0.0",
     "zustand": "^5.0.9"