diff --git a/README.md b/README.md
index c9c377f..7e2c8c4 100644
--- a/README.md
+++ b/README.md
@@ -112,6 +112,10 @@ jobs:
 
 This ensures the Coder API token is only accessible to workflows running on approved branches.
 
+## GitHub Enterprise Support
+
+This action supports GitHub Enterprise with the exception of the `github-username` input. You can use the `coder-username` input instead.
+
 ## License
 
 [MIT](LICENSE)
diff --git a/action.yml b/action.yml
index 9e8c972..f3691f1 100644
--- a/action.yml
+++ b/action.yml
@@ -44,7 +44,8 @@ runs:
             core.setFailed('No issue number provided and no issue context available');
             return;
           }
-          const runUrl = `https://github.com/${context.repo.owner}/${context.repo.repo}/actions/runs/${context.runId}`;
+          const serverUrl = '${{ github.server_url }}';
+          const runUrl = `${serverUrl}/${context.repo.owner}/${context.repo.repo}/actions/runs/${context.runId}`;
           const comment = await github.rest.issues.createComment({
             owner: context.repo.owner,
             repo: context.repo.repo,
@@ -73,6 +74,7 @@ runs:
         GITHUB_WORKFLOW_RUN_URL: ${{ steps.initial-comment.outputs.run_url }}
         TEMPLATE_NAME: ${{ inputs.template-name }}
         WORKSPACE_PARAMETERS: ${{ inputs.parameters }}
+        GITHUB_URL: ${{ github.api_url }}
       run: |
         node "${{ github.action_path }}/dist/index.js"
 
diff --git a/dist/index.js b/dist/index.js
index 1e74157..9d9ad75 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -1,4 +1,4 @@
-// Source hash: 502e316a739f1716d693e20b5f00db3e1fec499dd7ae21b8777097eb429691e8
+// Source hash: 67ce94766a35d0d05fa9b4d38675d2f4deff7b82278c094b42d55ed2dfba6572
 import { createRequire } from "node:module";
 var __create = Object.create;
 var __getProtoOf = Object.getPrototypeOf;
@@ -30481,7 +30481,8 @@ var ActionInputSchema = z.object({
   githubToken: z.string().min(1),
   githubWorkflowRunUrl: z.string().min(1),
   templateName: z.string().min(1),
-  workspaceParameters: z.string().min(1)
+  workspaceParameters: z.string().min(1),
+  githubUrl: z.string().min(1)
 });
 var WorkspaceParametersSchema = z.record(z.string(), z.string());
 
@@ -30493,7 +30494,10 @@ class StartWorkspaceAction {
   constructor(logger, input) {
     this.logger = logger;
     this.input = input;
-    this.octokit = new Octokit2({ auth: input.githubToken });
+    this.octokit = new Octokit2({
+      auth: input.githubToken,
+      baseUrl: input.githubUrl
+    });
     this.coder = new CoderClient(input.coderUrl, input.coderToken);
   }
   async coderUsernameByGitHubId(githubUserId) {
@@ -30625,7 +30629,8 @@ var main = async () => {
     githubToken: "GITHUB_TOKEN",
     githubWorkflowRunUrl: "GITHUB_WORKFLOW_RUN_URL",
     templateName: "TEMPLATE_NAME",
-    workspaceParameters: "WORKSPACE_PARAMETERS"
+    workspaceParameters: "WORKSPACE_PARAMETERS",
+    githubUrl: "GITHUB_URL"
   };
   const input = ActionInputSchema.parse(Object.fromEntries(Object.entries(inputEnv).map(([key, value]) => [
     key,
diff --git a/src/action.test.ts b/src/action.test.ts
index 4418491..3cbd8ac 100644
--- a/src/action.test.ts
+++ b/src/action.test.ts
@@ -3,7 +3,6 @@ import {
   StartWorkspaceAction,
   UserFacingError,
   type ActionInput,
-  type ExecOutput,
   type Logger,
 } from "./action";
 import dedent from "dedent";
@@ -31,30 +30,6 @@ interface ActionParams {
 }
 
 const newAction = (params?: ActionParams) => {
-  const defaults: ActionInput = {
-    githubUsername: "github-user",
-    coderUsername: "coder-user",
-    coderUrl: "https://example.com",
-    coderToken: "coder-token",
-    workspaceName: "workspace-name",
-    githubStatusCommentId: 123,
-    githubRepoOwner: "github-repo-owner",
-    githubRepoName: "github-repo-name",
-    githubToken: "github-token",
-    githubWorkflowRunUrl: "https://github.com/workflow-run",
-    templateName: "ubuntu",
-    workspaceParameters: dedent`
-      key: value
-      key2: value2
-      key3: value3
-    `.trim(),
-  };
-  // Loop through the input rather than use {...defaults, ...(params?.input ?? {})}
-  // to also allow overriding defaults with undefined values
-  for (const [key, value] of Object.entries(params?.input ?? {})) {
-    (defaults as any)[key] = value;
-  }
-
   const action = new StartWorkspaceAction(params?.logger ?? new TestLogger(), {
     githubUsername: "github-user",
     coderUsername: undefined,
@@ -72,23 +47,13 @@ const newAction = (params?: ActionParams) => {
         key2: value2
         key3: value3
       `.trim(),
+    githubUrl: "https://github.com",
     ...(params?.input ?? {}),
   });
 
   return action;
 };
 
-const identityExec = async (
-  strings: TemplateStringsArray,
-  ...args: unknown[]
-): Promise<ExecOutput> => {
-  let result = strings[0];
-  for (let i = 0; i < args.length; i++) {
-    result += String(args[i]) + strings[i + 1];
-  }
-  return { text: () => result ?? "" };
-};
-
 describe("StartWorkspaceAction", () => {
   it("coderUsernameByGitHubId", async () => {
     const logger = new TestLogger();
diff --git a/src/action.ts b/src/action.ts
index 1815140..ec865da 100644
--- a/src/action.ts
+++ b/src/action.ts
@@ -41,6 +41,7 @@ export const ActionInputSchema = z.object({
   githubWorkflowRunUrl: z.string().min(1),
   templateName: z.string().min(1),
   workspaceParameters: z.string().min(1),
+  githubUrl: z.string().min(1),
 });
 
 export type ActionInput = z.infer<typeof ActionInputSchema>;
@@ -56,7 +57,10 @@ export class StartWorkspaceAction {
     private readonly logger: Logger,
     private readonly input: ActionInput
   ) {
-    this.octokit = new Octokit({ auth: input.githubToken });
+    this.octokit = new Octokit({
+      auth: input.githubToken,
+      baseUrl: input.githubUrl,
+    });
     this.coder = new CoderClient(input.coderUrl, input.coderToken);
   }
 
diff --git a/src/index.ts b/src/index.ts
index 972375e..6cc6c65 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -24,6 +24,7 @@ const main = async () => {
     githubWorkflowRunUrl: "GITHUB_WORKFLOW_RUN_URL",
     templateName: "TEMPLATE_NAME",
     workspaceParameters: "WORKSPACE_PARAMETERS",
+    githubUrl: "GITHUB_URL",
   };
 
   const input = ActionInputSchema.parse(