diff --git a/.changeset/unlucky-queens-divide.md b/.changeset/unlucky-queens-divide.md
new file mode 100644
index 000000000..8935b8f06
--- /dev/null
+++ b/.changeset/unlucky-queens-divide.md
@@ -0,0 +1,5 @@
+---
+'@graphprotocol/graph-cli': patch
+---
+
+`graph auth`: fix bug with setting deploy key
diff --git a/packages/cli/src/commands/auth.ts b/packages/cli/src/commands/auth.ts
index 9e04cc63b..a09a830ca 100644
--- a/packages/cli/src/commands/auth.ts
+++ b/packages/cli/src/commands/auth.ts
@@ -1,5 +1,5 @@
 import { print, prompt } from 'gluegun';
-import { Args, Command, Flags, ux } from '@oclif/core';
+import { Args, Command, Flags } from '@oclif/core';
 import { saveDeployKey } from '../command-helpers/auth.js';
 import { chooseNodeUrl } from '../command-helpers/node.js';
 
@@ -16,6 +16,11 @@ export default class AuthCommand extends Command {
     }),
   };
 
+  private validateStudioDeployKey(value: string | undefined): boolean {
+    if (!value) return false;
+    return /^[0-9a-fA-F]{32}$/.test(value);
+  }
+
   async run() {
     const {
       args: { 'deploy-key': initialDeployKey },
@@ -25,15 +30,14 @@ export default class AuthCommand extends Command {
 
     const { deployKey } = await prompt.ask<{ deployKey: string }>([
       {
-        type: 'invisible',
+        type: 'input',
         name: 'deployKey',
-        message: () => 'What is the deploy key?',
-        initial: initialDeployKey,
+        message: () => 'What is your Subgraph Studio deploy key?',
         required: true,
+        initial: initialDeployKey,
+        skip: this.validateStudioDeployKey(initialDeployKey),
         validate: value =>
-          value.length > 200
-            ? ux.error('✖ Deploy key must not exceed 200 characters', { exit: 1 })
-            : value,
+          this.validateStudioDeployKey(value) || `Invalid Subgraph Studio deploy key: ${value}`,
       },
     ]);
 
@@ -41,7 +45,7 @@ export default class AuthCommand extends Command {
       await saveDeployKey(node!, deployKey);
       print.success(`Deploy key set for ${node}`);
     } catch (e) {
-      this.error(e, { exit: 1 });
+      this.error(`Failed to set deploy key: ${e.message}`, { exit: 1 });
     }
   }
 }