diff --git a/src/bundler/utils/Utils.ts b/src/bundler/utils/Utils.ts
index 700a2bb59..7587b3749 100644
--- a/src/bundler/utils/Utils.ts
+++ b/src/bundler/utils/Utils.ts
@@ -1,23 +1,50 @@
-export const extractChainIdFromBundlerUrl = (url: string): number => {
+/**
+ * Extracts the chain ID from a given URL.
+ * 
+ * @param url - The URL to extract the chain ID from.
+ * @returns The extracted chain ID as a number.
+ * @throws {Error} If the chain ID is not found in the URL or is invalid.
+ * 
+ * @example
+ * // Returns 80001
+ * extractChainIdFromUrl("https://example.com/api/v2/80001/rpc")
+ */
+export const extractChainIdFromUrl = (url: string): number => {
   try {
-    const regex = /\/api\/v2\/(\d+)\/[a-zA-Z0-9.-]+$/
-    // biome-ignore lint/style/noNonNullAssertion: <explanation>
-    const match = regex.exec(url)!
-    return Number.parseInt(match[1])
-  } catch (error) {
-    throw new Error("Invalid chain id")
-  }
-}
-
-export const extractChainIdFromPaymasterUrl = (url: string): number => {
-  try {
-    const regex = /\/api\/v\d+\/(\d+)\//
-    const match = regex.exec(url)
+    const regex = /\/(\d+)\//;
+    const match = regex.exec(new URL(url).pathname);
     if (!match) {
-      throw new Error("Invalid URL format")
+      throw new Error("Chain ID not found in URL");
     }
-    return Number.parseInt(match[1])
+    const chainId = Number.parseInt(match[1], 10);
+    if (Number.isNaN(chainId)) {
+      throw new Error("Invalid chain ID");
+    }
+    return chainId;
   } catch (error) {
-    throw new Error("Invalid chain id")
+    if (error instanceof Error) {
+      throw new Error(`Invalid chain id: ${error.message}`);
+    }
+    throw new Error("Invalid chain id");
   }
-}
+};
+
+/**
+ * Extracts the chain ID from a bundler URL.
+ * 
+ * @param url - The bundler URL to extract the chain ID from.
+ * @returns The extracted chain ID as a number.
+ * @throws {Error} If the chain ID is not found in the URL or is invalid.
+ */
+export const extractChainIdFromBundlerUrl = (url: string): number =>
+  extractChainIdFromUrl(url);
+
+/**
+ * Extracts the chain ID from a paymaster URL.
+ * 
+ * @param url - The paymaster URL to extract the chain ID from.
+ * @returns The extracted chain ID as a number.
+ * @throws {Error} If the chain ID is not found in the URL or is invalid.
+ */
+export const extractChainIdFromPaymasterUrl = (url: string): number =>
+  extractChainIdFromUrl(url);
\ No newline at end of file
diff --git a/tests/bundler/read.test.ts b/tests/bundler/read.test.ts
index 2b8c27b4b..2dcbca7a5 100644
--- a/tests/bundler/read.test.ts
+++ b/tests/bundler/read.test.ts
@@ -6,9 +6,8 @@ import {
   type BiconomySmartAccountV2Config,
   compareChainIds,
   createSmartAccountClient,
-  getCustomChain
 } from "../../src/account"
-import { createBundler } from "../../src/bundler"
+import { createBundler, extractChainIdFromUrl } from "../../src/bundler"
 import { getBundlerUrl, getConfig } from "../utils"
 
 describe("Bundler:Read", () => {
@@ -51,11 +50,11 @@ describe("Bundler:Read", () => {
         })
       )
     )
-    ;[smartAccountAddress, smartAccountAddressTwo] = await Promise.all(
-      [smartAccount, smartAccountTwo].map((account) =>
-        account.getAccountAddress()
+      ;[smartAccountAddress, smartAccountAddressTwo] = await Promise.all(
+        [smartAccount, smartAccountTwo].map((account) =>
+          account.getAccountAddress()
+        )
       )
-    )
   })
 
   test.concurrent(
@@ -200,4 +199,30 @@ describe("Bundler:Read", () => {
       await expect(createAccount).rejects.toThrow()
     }
   )
+
+  test.concurrent('extracts chain ID from various URL structures', () => {
+    const testCases = [
+      { url: "https://example.com/api/v2/1234/endpoint", expected: 1234 },
+      { url: "https://api.example.com/v1/5678/resource", expected: 5678 },
+      { url: "http://localhost:3000/api/9876/action", expected: 9876 },
+      { url: "https://example.com/1234/api/v2/endpoint", expected: 1234 },
+      { url: "https://example.com/network/5678/resource/action", expected: 5678 },
+      { url: "https://api.example.com/prefix/9876/suffix", expected: 9876 },
+      { url: "https://example.com/api/v2/1234/5678/endpoint", expected: 1234 },
+      { url: "https://example.com/api/v2/endpoint/1234/", expected: 1234 },
+      { url: "https://example.com/api/v2/1234/endpoint?param=value", expected: 1234 },
+      { url: "https://example.com/api/v2/1234/endpoint#section", expected: 1234 },
+      { url: "https://subdomain.example.com/api/1234/endpoint", expected: 1234 },
+      { url: "http://192.168.1.1/api/1234/endpoint", expected: 1234 },
+      { url: "https://user:pass@example.com/api/1234/endpoint", expected: 1234 },
+      { url: "https://example.com/1234/", expected: 1234 },
+      { url: "https://api.example.com/v1/chain/5678/details", expected: 5678 },
+      { url: "https://paymaster.biconomy.io/api/v1/80001/-RObQRX9ei.fc6918eb-c582-4417-9d5a-0507b17cfe71", expected: 80001 },
+      { url: "https://bundler.biconomy.io/api/v2/80002/nJPK7B3ru.dd7f7861-190d-41bd-af80-6877f74b8f44", expected: 80002 },
+    ];
+
+    for (const { url, expected } of testCases) {
+      expect(extractChainIdFromUrl(url)).toBe(expected);
+    }
+  })
 })