chore(mcp-server): return access instructions for 404 without API key

Author: stainless-app[bot]

packages/mcp-server/src/code-tool.ts

@@ -176,6 +176,11 @@ const remoteStainlessHandler = async ({
   });
 
   if (!res.ok) {
+    if (res.status === 404 && !reqContext.stainlessApiKey) {
+      throw new Error(
+        'Could not access code tool for this project. You may need to provide a Stainless API key via the STAINLESS_API_KEY environment variable, the --stainless-api-key flag, or the x-stainless-api-key HTTP header.',
+      );
+    }
     throw new Error(
       `${res.status}: ${
         res.statusText

packages/mcp-server/src/docs-search-tool.ts

@@ -73,6 +73,13 @@ export const handler = async ({
       },
       'Got error response from docs search tool',
     );
+
+    if (result.status === 404 && !reqContext.stainlessApiKey) {
+      throw new Error(
+        'Could not find docs for this project. You may need to provide a Stainless API key via the STAINLESS_API_KEY environment variable, the --stainless-api-key flag, or the x-stainless-api-key HTTP header.',
+      );
+    }
+
     throw new Error(
       `${result.status}: ${result.statusText} when using doc search tool. Details: ${errorText}`,
     );