diff --git a/src/auth.ts b/src/auth.ts
index cb31ff6f8..3ff45ed51 100644
--- a/src/auth.ts
+++ b/src/auth.ts
@@ -10,6 +10,7 @@ import { setupGitHubToken } from "./lib/token"
 interface RunAuthOptions {
   verbose: boolean
   showToken: boolean
+  githubUrl?: string
 }
 
 export async function runAuth(options: RunAuthOptions): Promise<void> {
@@ -20,6 +21,12 @@ export async function runAuth(options: RunAuthOptions): Promise<void> {
 
   state.showToken = options.showToken
 
+  const githubUrl = options.githubUrl ?? process.env.GITHUB_URL
+  if (githubUrl) {
+    state.githubUrl = githubUrl
+    consola.info(`Using GitHub Enterprise URL: ${githubUrl}`)
+  }
+
   await ensurePaths()
   await setupGitHubToken({ force: true })
   consola.success("GitHub token written to", PATHS.GITHUB_TOKEN_PATH)
@@ -42,11 +49,17 @@ export const auth = defineCommand({
       default: false,
       description: "Show GitHub token on auth",
     },
+    "github-url": {
+      type: "string",
+      description:
+        "GitHub Enterprise URL (e.g., https://github.example.com). Can also be set via GITHUB_URL env var",
+    },
   },
   run({ args }) {
     return runAuth({
       verbose: args.verbose,
       showToken: args["show-token"],
+      githubUrl: args["github-url"],
     })
   },
 })
diff --git a/src/lib/api-config.ts b/src/lib/api-config.ts
index 83bce92ad..d1152a685 100644
--- a/src/lib/api-config.ts
+++ b/src/lib/api-config.ts
@@ -36,7 +36,11 @@ export const copilotHeaders = (state: State, vision: boolean = false) => {
   return headers
 }
 
-export const GITHUB_API_BASE_URL = "https://api.github.com"
+export const githubApiBaseUrl = (state: State) =>
+  state.githubUrl ?
+    `${state.githubUrl.replace(/\/$/, "")}/api/v3`
+  : "https://api.github.com"
+
 export const githubHeaders = (state: State) => ({
   ...standardHeaders(),
   authorization: `token ${state.githubToken}`,
@@ -47,6 +51,8 @@ export const githubHeaders = (state: State) => ({
   "x-vscode-user-agent-library-version": "electron-fetch",
 })
 
-export const GITHUB_BASE_URL = "https://github.com"
+export const githubBaseUrl = (state: State) =>
+  state.githubUrl ? state.githubUrl.replace(/\/$/, "") : "https://github.com"
+
 export const GITHUB_CLIENT_ID = "Iv1.b507a08c87ecfe98"
 export const GITHUB_APP_SCOPES = ["read:user"].join(" ")
diff --git a/src/lib/state.ts b/src/lib/state.ts
index 5ba4dc1d1..5c581dc6f 100644
--- a/src/lib/state.ts
+++ b/src/lib/state.ts
@@ -12,6 +12,9 @@ export interface State {
   rateLimitWait: boolean
   showToken: boolean
 
+  // GitHub Enterprise URL (e.g., https://github.example.com)
+  githubUrl?: string
+
   // Rate limiting configuration
   rateLimitSeconds?: number
   lastRequestTimestamp?: number
diff --git a/src/services/github/get-copilot-token.ts b/src/services/github/get-copilot-token.ts
index 98744bab1..28ec6baac 100644
--- a/src/services/github/get-copilot-token.ts
+++ b/src/services/github/get-copilot-token.ts
@@ -1,10 +1,10 @@
-import { GITHUB_API_BASE_URL, githubHeaders } from "~/lib/api-config"
+import { githubApiBaseUrl, githubHeaders } from "~/lib/api-config"
 import { HTTPError } from "~/lib/error"
 import { state } from "~/lib/state"
 
 export const getCopilotToken = async () => {
   const response = await fetch(
-    `${GITHUB_API_BASE_URL}/copilot_internal/v2/token`,
+    `${githubApiBaseUrl(state)}/copilot_internal/v2/token`,
     {
       headers: githubHeaders(state),
     },
diff --git a/src/services/github/get-copilot-usage.ts b/src/services/github/get-copilot-usage.ts
index 6cdd8bc10..718bd0432 100644
--- a/src/services/github/get-copilot-usage.ts
+++ b/src/services/github/get-copilot-usage.ts
@@ -1,11 +1,14 @@
-import { GITHUB_API_BASE_URL, githubHeaders } from "~/lib/api-config"
+import { githubApiBaseUrl, githubHeaders } from "~/lib/api-config"
 import { HTTPError } from "~/lib/error"
 import { state } from "~/lib/state"
 
 export const getCopilotUsage = async (): Promise<CopilotUsageResponse> => {
-  const response = await fetch(`${GITHUB_API_BASE_URL}/copilot_internal/user`, {
-    headers: githubHeaders(state),
-  })
+  const response = await fetch(
+    `${githubApiBaseUrl(state)}/copilot_internal/user`,
+    {
+      headers: githubHeaders(state),
+    },
+  )
 
   if (!response.ok) {
     throw new HTTPError("Failed to get Copilot usage", response)
diff --git a/src/services/github/get-device-code.ts b/src/services/github/get-device-code.ts
index cf35f4ec9..9b73b8089 100644
--- a/src/services/github/get-device-code.ts
+++ b/src/services/github/get-device-code.ts
@@ -1,13 +1,14 @@
 import {
   GITHUB_APP_SCOPES,
-  GITHUB_BASE_URL,
   GITHUB_CLIENT_ID,
+  githubBaseUrl,
   standardHeaders,
 } from "~/lib/api-config"
 import { HTTPError } from "~/lib/error"
+import { state } from "~/lib/state"
 
 export async function getDeviceCode(): Promise<DeviceCodeResponse> {
-  const response = await fetch(`${GITHUB_BASE_URL}/login/device/code`, {
+  const response = await fetch(`${githubBaseUrl(state)}/login/device/code`, {
     method: "POST",
     headers: standardHeaders(),
     body: JSON.stringify({
diff --git a/src/services/github/get-user.ts b/src/services/github/get-user.ts
index 23e1b1c1c..680475e4a 100644
--- a/src/services/github/get-user.ts
+++ b/src/services/github/get-user.ts
@@ -1,9 +1,9 @@
-import { GITHUB_API_BASE_URL, standardHeaders } from "~/lib/api-config"
+import { githubApiBaseUrl, standardHeaders } from "~/lib/api-config"
 import { HTTPError } from "~/lib/error"
 import { state } from "~/lib/state"
 
 export async function getGitHubUser() {
-  const response = await fetch(`${GITHUB_API_BASE_URL}/user`, {
+  const response = await fetch(`${githubApiBaseUrl(state)}/user`, {
     headers: {
       authorization: `token ${state.githubToken}`,
       ...standardHeaders(),
diff --git a/src/services/github/poll-access-token.ts b/src/services/github/poll-access-token.ts
index 4639ee0dc..a8fe038b9 100644
--- a/src/services/github/poll-access-token.ts
+++ b/src/services/github/poll-access-token.ts
@@ -1,10 +1,11 @@
 import consola from "consola"
 
 import {
-  GITHUB_BASE_URL,
   GITHUB_CLIENT_ID,
+  githubBaseUrl,
   standardHeaders,
 } from "~/lib/api-config"
+import { state } from "~/lib/state"
 import { sleep } from "~/lib/utils"
 
 import type { DeviceCodeResponse } from "./get-device-code"
@@ -19,7 +20,7 @@ export async function pollAccessToken(
 
   while (true) {
     const response = await fetch(
-      `${GITHUB_BASE_URL}/login/oauth/access_token`,
+      `${githubBaseUrl(state)}/login/oauth/access_token`,
       {
         method: "POST",
         headers: standardHeaders(),
diff --git a/src/start.ts b/src/start.ts
index 14abbbdff..55804b57f 100644
--- a/src/start.ts
+++ b/src/start.ts
@@ -22,6 +22,7 @@ interface RunServerOptions {
   rateLimit?: number
   rateLimitWait: boolean
   githubToken?: string
+  githubUrl?: string
   claudeCode: boolean
   showToken: boolean
   proxyEnv: boolean
@@ -42,6 +43,12 @@ export async function runServer(options: RunServerOptions): Promise<void> {
     consola.info(`Using ${options.accountType} plan GitHub account`)
   }
 
+  const githubUrl = options.githubUrl ?? process.env.GITHUB_URL
+  if (githubUrl) {
+    state.githubUrl = githubUrl
+    consola.info(`Using GitHub Enterprise URL: ${githubUrl}`)
+  }
+
   state.manualApprove = options.manual
   state.rateLimitSeconds = options.rateLimit
   state.rateLimitWait = options.rateLimitWait
@@ -184,6 +191,11 @@ export const start = defineCommand({
       default: false,
       description: "Initialize proxy from environment variables",
     },
+    "github-url": {
+      type: "string",
+      description:
+        "GitHub Enterprise URL (e.g., https://github.example.com). Can also be set via GITHUB_URL env var",
+    },
   },
   run({ args }) {
     const rateLimitRaw = args["rate-limit"]
@@ -199,6 +211,7 @@ export const start = defineCommand({
       rateLimit,
       rateLimitWait: args.wait,
       githubToken: args["github-token"],
+      githubUrl: args["github-url"],
       claudeCode: args["claude-code"],
       showToken: args["show-token"],
       proxyEnv: args["proxy-env"],