diff --git a/src/mcp/github-file-ops-server.ts b/src/mcp/github-file-ops-server.ts
index a34f115..9a769af 100644
--- a/src/mcp/github-file-ops-server.ts
+++ b/src/mcp/github-file-ops-server.ts
@@ -466,6 +466,7 @@ server.tool(
 
       const octokit = new Octokit({
         auth: githubToken,
+        baseUrl: GITHUB_API_URL,
       });
 
       const isPullRequestReviewComment =
diff --git a/src/mcp/install-mcp-server.ts b/src/mcp/install-mcp-server.ts
index 0eba6af..0fa5436 100644
--- a/src/mcp/install-mcp-server.ts
+++ b/src/mcp/install-mcp-server.ts
@@ -1,4 +1,5 @@
 import * as core from "@actions/core";
+import { GITHUB_API_URL } from "../github/api/config";
 
 type PrepareConfigParams = {
   githubToken: string;
@@ -46,6 +47,7 @@ export async function prepareMcpConfig(
             ...(claudeCommentId && { CLAUDE_COMMENT_ID: claudeCommentId }),
             GITHUB_EVENT_NAME: process.env.GITHUB_EVENT_NAME || "",
             IS_PR: process.env.IS_PR || "false",
+            GITHUB_API_URL: GITHUB_API_URL,
           },
         },
       },