diff --git a/app/Enums/BankingProvider.php b/app/Enums/BankingProvider.php
index cec2ba10..28faca15 100644
--- a/app/Enums/BankingProvider.php
+++ b/app/Enums/BankingProvider.php
@@ -70,6 +70,23 @@ enum BankingProvider: string
         };
     }
 
+    /**
+     * Validation rules for this provider's credential inputs, keyed by input
+     * name. Shared by the connect Form Requests and the update request.
+     *
+     * @return array<string, array<int, mixed>>
+     */
+    public function credentialRules(): array
+    {
+        $rules = [];
+
+        foreach ($this->credentialFields() as $field) {
+            $rules[$field->input] = $field->rules;
+        }
+
+        return $rules;
+    }
+
     /**
      * Map validated request input to the encrypted connection columns.
      *
diff --git a/app/Http/Requests/OpenBanking/ConnectBinanceRequest.php b/app/Http/Requests/OpenBanking/ConnectBinanceRequest.php
index 02597348..78661859 100644
--- a/app/Http/Requests/OpenBanking/ConnectBinanceRequest.php
+++ b/app/Http/Requests/OpenBanking/ConnectBinanceRequest.php
@@ -2,6 +2,7 @@
 
 namespace App\Http\Requests\OpenBanking;
 
+use App\Enums\BankingProvider;
 use Illuminate\Foundation\Http\FormRequest;
 
 class ConnectBinanceRequest extends FormRequest
@@ -17,8 +18,7 @@ class ConnectBinanceRequest extends FormRequest
     public function rules(): array
     {
         return [
-            'api_key' => ['required', 'string', 'min:10'],
-            'api_secret' => ['required', 'string', 'min:10'],
+            ...BankingProvider::Binance->credentialRules(),
             'country' => ['required', 'string', 'size:2'],
         ];
     }
diff --git a/app/Http/Requests/OpenBanking/ConnectBitpandaRequest.php b/app/Http/Requests/OpenBanking/ConnectBitpandaRequest.php
index 500152f5..93c8b27b 100644
--- a/app/Http/Requests/OpenBanking/ConnectBitpandaRequest.php
+++ b/app/Http/Requests/OpenBanking/ConnectBitpandaRequest.php
@@ -2,6 +2,7 @@
 
 namespace App\Http\Requests\OpenBanking;
 
+use App\Enums\BankingProvider;
 use Illuminate\Foundation\Http\FormRequest;
 
 class ConnectBitpandaRequest extends FormRequest
@@ -17,7 +18,7 @@ class ConnectBitpandaRequest extends FormRequest
     public function rules(): array
     {
         return [
-            'api_key' => ['required', 'string', 'min:10'],
+            ...BankingProvider::Bitpanda->credentialRules(),
             'country' => ['required', 'string', 'size:2'],
         ];
     }
diff --git a/app/Http/Requests/OpenBanking/ConnectCoinbaseRequest.php b/app/Http/Requests/OpenBanking/ConnectCoinbaseRequest.php
index 05433830..f74e9129 100644
--- a/app/Http/Requests/OpenBanking/ConnectCoinbaseRequest.php
+++ b/app/Http/Requests/OpenBanking/ConnectCoinbaseRequest.php
@@ -2,6 +2,7 @@
 
 namespace App\Http\Requests\OpenBanking;
 
+use App\Enums\BankingProvider;
 use Illuminate\Foundation\Http\FormRequest;
 
 class ConnectCoinbaseRequest extends FormRequest
@@ -17,8 +18,7 @@ class ConnectCoinbaseRequest extends FormRequest
     public function rules(): array
     {
         return [
-            'api_key_name' => ['required', 'string', 'regex:/^(organizations\/[a-z0-9-]+\/apiKeys\/[a-z0-9-]+|[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{12})$/i'],
-            'private_key' => ['required', 'string', 'min:40'],
+            ...BankingProvider::Coinbase->credentialRules(),
             'country' => ['required', 'string', 'size:2'],
         ];
     }
diff --git a/app/Http/Requests/OpenBanking/ConnectIndexaCapitalRequest.php b/app/Http/Requests/OpenBanking/ConnectIndexaCapitalRequest.php
index 27b0d3c1..894c35ca 100644
--- a/app/Http/Requests/OpenBanking/ConnectIndexaCapitalRequest.php
+++ b/app/Http/Requests/OpenBanking/ConnectIndexaCapitalRequest.php
@@ -2,6 +2,7 @@
 
 namespace App\Http\Requests\OpenBanking;
 
+use App\Enums\BankingProvider;
 use Illuminate\Foundation\Http\FormRequest;
 
 class ConnectIndexaCapitalRequest extends FormRequest
@@ -16,8 +17,6 @@ class ConnectIndexaCapitalRequest extends FormRequest
      */
     public function rules(): array
     {
-        return [
-            'api_token' => ['required', 'string', 'min:10'],
-        ];
+        return BankingProvider::IndexaCapital->credentialRules();
     }
 }
diff --git a/app/Http/Requests/OpenBanking/ConnectInteractiveBrokersRequest.php b/app/Http/Requests/OpenBanking/ConnectInteractiveBrokersRequest.php
index b471032e..c1ce9e84 100644
--- a/app/Http/Requests/OpenBanking/ConnectInteractiveBrokersRequest.php
+++ b/app/Http/Requests/OpenBanking/ConnectInteractiveBrokersRequest.php
@@ -2,6 +2,7 @@
 
 namespace App\Http\Requests\OpenBanking;
 
+use App\Enums\BankingProvider;
 use Illuminate\Foundation\Http\FormRequest;
 
 class ConnectInteractiveBrokersRequest extends FormRequest
@@ -16,9 +17,6 @@ class ConnectInteractiveBrokersRequest extends FormRequest
      */
     public function rules(): array
     {
-        return [
-            'token' => ['required', 'string', 'min:10'],
-            'query_id' => ['required', 'string', 'min:3'],
-        ];
+        return BankingProvider::InteractiveBrokers->credentialRules();
     }
 }
diff --git a/app/Http/Requests/OpenBanking/ConnectWiseRequest.php b/app/Http/Requests/OpenBanking/ConnectWiseRequest.php
index 02262b5a..21e1d402 100644
--- a/app/Http/Requests/OpenBanking/ConnectWiseRequest.php
+++ b/app/Http/Requests/OpenBanking/ConnectWiseRequest.php
@@ -2,6 +2,7 @@
 
 namespace App\Http\Requests\OpenBanking;
 
+use App\Enums\BankingProvider;
 use Illuminate\Foundation\Http\FormRequest;
 
 class ConnectWiseRequest extends FormRequest
@@ -12,13 +13,11 @@ class ConnectWiseRequest extends FormRequest
     }
 
     /**
-     * @return array<string, array<int, string>>
+     * @return array<string, array<mixed>>
      */
     public function rules(): array
     {
-        return [
-            'api_token' => ['required', 'string', 'min:10'],
-        ];
+        return BankingProvider::Wise->credentialRules();
     }
 
     /**
diff --git a/app/Http/Requests/OpenBanking/UpdateConnectionCredentialsRequest.php b/app/Http/Requests/OpenBanking/UpdateConnectionCredentialsRequest.php
index b2009345..ec0f400f 100644
--- a/app/Http/Requests/OpenBanking/UpdateConnectionCredentialsRequest.php
+++ b/app/Http/Requests/OpenBanking/UpdateConnectionCredentialsRequest.php
@@ -26,12 +26,6 @@ class UpdateConnectionCredentialsRequest extends FormRequest
             return [];
         }
 
-        $rules = [];
-
-        foreach ($connection->provider->credentialFields() as $field) {
-            $rules[$field->input] = $field->rules;
-        }
-
-        return $rules;
+        return $connection->provider->credentialRules();
     }
 }