diff --git a/.speakeasy/gen.yaml b/.speakeasy/gen.yaml
index 6152b05f..07628c77 100644
--- a/.speakeasy/gen.yaml
+++ b/.speakeasy/gen.yaml
@@ -27,7 +27,8 @@ generation:
   versioningStrategy: automatic
   mockServer:
     disabled: false
-  persistentEdits: {}
+  persistentEdits:
+    enabled: true
   tests:
     generateTests: true
     generateNewTests: true
diff --git a/README.md b/README.md
index 603b3ad8..97a3818b 100644
--- a/README.md
+++ b/README.md
@@ -14,7 +14,7 @@ Each namespace has its own authentication requirements and access patterns. Whil
 ```typescript
 // Example of accessing Client namespace
 const glean = new Glean({
-  instance: 'instance-name',
+  serverURL: "https://mycompany-be.glean.com",
   apiToken: 'client-token'
 });
 
@@ -24,7 +24,7 @@ await glean.client.search.query({
 
 // Example of accessing Indexing namespace 
 const glean = new Glean({
-  instance: 'instance-name',
+  serverURL: "https://mycompany-be.glean.com",
   apiToken: 'indexing-token'
 });
 
@@ -1169,7 +1169,7 @@ import { Glean } from "@gleanwork/api-client";
 
 const glean = new Glean({
   apiToken: process.env["GLEAN_API_TOKEN"] ?? "",
-  instance: process.env["GLEAN_INSTANCE"] ?? "",
+  serverURL: "https://mycompany-be.glean.com",
 });
 ```
 
@@ -1182,7 +1182,7 @@ import type { XGleanOptions } from "@gleanwork/api-client/hooks/x-glean-options.
 
 const opts = {
   apiToken: process.env["GLEAN_API_TOKEN"] ?? "",
-  instance: process.env["GLEAN_INSTANCE"] ?? "",
+  serverURL: "https://mycompany-be.glean.com",
   excludeDeprecatedAfter: "2026-10-15",
   includeExperimental: true,
 } satisfies SDKOptions & XGleanOptions;
diff --git a/src/__tests__/indexing.test-d.ts b/src/__tests__/indexing.test-d.ts
index eec60088..2d3f1bb4 100644
--- a/src/__tests__/indexing.test-d.ts
+++ b/src/__tests__/indexing.test-d.ts
@@ -6,7 +6,7 @@ test("type test for `Glean` constructor", () => {
   async function run() {
     const glean = new Glean({
       apiToken: process.env["GLEAN_API_TOKEN"],
-      instance: process.env["GLEAN_INSTANCE"],
+      serverURL: process.env["GLEAN_SERVER_URL"],
     });
 
     const response = await glean.indexing.documents.index({
@@ -34,7 +34,7 @@ test("type test for `Glean` constructor", () => {
   
   const correctClient = new Glean({
     apiToken: "token",
-    instance: "example-instance",
+    serverURL: "https://mycompany-be.glean.com",
   });
   expectTypeOf(correctClient).toEqualTypeOf<Glean>();
 });
diff --git a/src/__tests__/server-url-normalizer.test.ts b/src/__tests__/server-url-normalizer.test.ts
new file mode 100644
index 00000000..4a086564
--- /dev/null
+++ b/src/__tests__/server-url-normalizer.test.ts
@@ -0,0 +1,113 @@
+import { describe, expect, it } from "vitest";
+import {
+  normalizeServerURL,
+  serverURLNormalizerHook,
+} from "../hooks/server-url-normalizer.js";
+import { HTTPClient } from "../lib/http.js";
+import { SDKInitOptions } from "../hooks/types.js";
+import { serverURLFromOptions } from "../lib/config.js";
+
+describe("normalizeServerURL", () => {
+  it("should prepend https:// when no scheme is provided", () => {
+    expect(normalizeServerURL("example.glean.com")).toBe(
+      "https://example.glean.com",
+    );
+  });
+
+  it("should preserve https:// scheme", () => {
+    expect(normalizeServerURL("https://example.glean.com")).toBe(
+      "https://example.glean.com",
+    );
+  });
+
+  it("should preserve http:// for localhost", () => {
+    expect(normalizeServerURL("http://localhost:8080")).toBe(
+      "http://localhost:8080",
+    );
+  });
+
+  it("should preserve http:// for non-localhost URLs", () => {
+    expect(normalizeServerURL("http://example.glean.com")).toBe(
+      "http://example.glean.com",
+    );
+  });
+
+  it("should strip trailing slashes", () => {
+    expect(normalizeServerURL("https://example.glean.com/")).toBe(
+      "https://example.glean.com",
+    );
+  });
+
+  it("should strip multiple trailing slashes", () => {
+    expect(normalizeServerURL("https://example.glean.com///")).toBe(
+      "https://example.glean.com",
+    );
+  });
+
+  it("should preserve URLs with paths", () => {
+    expect(normalizeServerURL("https://example.glean.com/api/v1")).toBe(
+      "https://example.glean.com/api/v1",
+    );
+  });
+
+  it("should handle no scheme with trailing slash", () => {
+    expect(normalizeServerURL("example.glean.com/")).toBe(
+      "https://example.glean.com",
+    );
+  });
+});
+
+describe("serverURLNormalizerHook", () => {
+  function createOpts(baseURL: string | null): SDKInitOptions {
+    return {
+      baseURL: baseURL ? new URL(baseURL) : null,
+      client: new HTTPClient(),
+    };
+  }
+
+  it("should normalize the baseURL when present", () => {
+    const opts = {
+      baseURL: new URL("https://example.glean.com/"),
+      client: new HTTPClient(),
+    };
+
+    const result = serverURLNormalizerHook.sdkInit(opts);
+
+    expect(result.baseURL?.toString()).toBe("https://example.glean.com/");
+  });
+
+  it("should return opts unchanged when baseURL is null", () => {
+    const opts = createOpts(null);
+
+    const result = serverURLNormalizerHook.sdkInit(opts);
+
+    expect(result.baseURL).toBeNull();
+  });
+});
+
+describe("serverURLFromOptions (config.ts normalization)", () => {
+  it("should handle schemeless serverURL", () => {
+    const url = serverURLFromOptions({ serverURL: "mycompany-be.glean.com" });
+    expect(url?.origin).toBe("https://mycompany-be.glean.com");
+  });
+
+  it("should handle serverURL with https scheme", () => {
+    const url = serverURLFromOptions({ serverURL: "https://mycompany-be.glean.com" });
+    expect(url?.origin).toBe("https://mycompany-be.glean.com");
+  });
+
+  it("should handle serverURL with http scheme", () => {
+    const url = serverURLFromOptions({ serverURL: "http://localhost:8080" });
+    expect(url?.origin).toBe("http://localhost:8080");
+  });
+
+  it("should handle serverURL with trailing slashes", () => {
+    const url = serverURLFromOptions({ serverURL: "https://mycompany-be.glean.com///" });
+    expect(url?.origin).toBe("https://mycompany-be.glean.com");
+  });
+
+  it("should handle schemeless serverURL with trailing slash", () => {
+    const url = serverURLFromOptions({ serverURL: "mycompany-be.glean.com/" });
+    expect(url?.origin).toBe("https://mycompany-be.glean.com");
+  });
+});
diff --git a/src/hooks/registration.ts b/src/hooks/registration.ts
index 2b00fb65..287c71c4 100644
--- a/src/hooks/registration.ts
+++ b/src/hooks/registration.ts
@@ -1,5 +1,6 @@
 import { Hooks, AfterErrorHook } from "./types.js";
 import { XGlean } from "./x-glean.js";
+import { serverURLNormalizerHook } from "./server-url-normalizer.js";
 
 /*
  * This file is only ever generated once on the first generation and then is free to be modified.
@@ -47,6 +48,7 @@ export function initHooks(hooks: Hooks) {
   // Add hooks by calling hooks.register{ClientInit/BeforeCreateRequest/BeforeRequest/AfterSuccess/AfterError}Hook
   // with an instance of a hook that implements that specific Hook interface
   // Hooks are registered per SDK instance, and are valid for the lifetime of the SDK instance
+  hooks.registerSDKInitHook(serverURLNormalizerHook);
   hooks.registerAfterErrorHook(agentFileUploadErrorHook);
 
   // Register the X-Glean header hook for experimental features and deprecation testing
diff --git a/src/hooks/server-url-normalizer.ts b/src/hooks/server-url-normalizer.ts
new file mode 100644
index 00000000..b376dc7e
--- /dev/null
+++ b/src/hooks/server-url-normalizer.ts
@@ -0,0 +1,20 @@
+import { SDKInitHook, SDKInitOptions } from "./types.js";
+
+export function normalizeServerURL(url: string): string {
+  let normalized = url;
+  if (!/^https?:\/\//i.test(normalized)) {
+    normalized = `https://${normalized}`;
+  }
+  normalized = normalized.replace(/\/+$/, "");
+  return normalized;
+}
+
+export const serverURLNormalizerHook: SDKInitHook = {
+  sdkInit(opts: SDKInitOptions): SDKInitOptions {
+    if (opts.baseURL) {
+      const normalized = normalizeServerURL(opts.baseURL.toString());
+      opts.baseURL = new URL(normalized);
+    }
+    return opts;
+  },
+};
diff --git a/src/lib/config.ts b/src/lib/config.ts
index 715aecd5..9399728d 100644
--- a/src/lib/config.ts
+++ b/src/lib/config.ts
@@ -61,7 +61,11 @@ export function serverURLFromOptions(options: SDKOptions): URL | null {
     params = serverParams[serverIdx] || {};
   }
 
-  const u = pathToFunc(serverURL)(params);
+  let u = pathToFunc(serverURL)(params);
+  if (u && !/^https?:\/\//i.test(u)) {
+    u = `https://${u}`;
+  }
+  u = u.replace(/\/+$/, "");
   return new URL(u);
 }