diff --git a/lib/MissingParameterException.php b/lib/MissingParameterException.php
new file mode 100644
index 0000000..3b28e9f
--- /dev/null
+++ b/lib/MissingParameterException.php
@@ -0,0 +1,84 @@
+<?php
+
+/*
+ * Copyright MacFJA
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
+ * documentation files (the "Software"), to deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
+ * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+namespace MacFJA\BookRetriever;
+
+use function array_filter;
+use function array_keys;
+use function count;
+use function get_class;
+use function implode;
+use RuntimeException;
+use function sprintf;
+
+class MissingParameterException extends RuntimeException
+{
+    /** @var array<string> */
+    private $parameters;
+
+    /** @var string */
+    private $details;
+
+    /** @var ProviderInterface */
+    private $provider;
+
+    public function __construct(ProviderInterface $provider, array $missingParametersName, string $details)
+    {
+        $this->parameters = $missingParametersName;
+        $this->provider = $provider;
+        $this->details = $details;
+        parent::__construct($this->getParametersMessage().\PHP_EOL.$details);
+    }
+
+    public static function throwIfMissing(ProviderInterface $provider, array $parameters, string $details): void
+    {
+        $missing = array_filter($parameters, function ($value) {
+            return null === $value || empty($value);
+        });
+        if (0 === count($missing)) {
+            return;
+        }
+
+        throw new static($provider, array_keys($missing), $details);
+    }
+
+    public function getParametersMessage(): string
+    {
+        return sprintf(
+            'The provider %s have required parameters.'.\PHP_EOL.'Missing parameters are: %s',
+            get_class($this->provider),
+            implode(', ', $this->parameters)
+        );
+    }
+
+    public function getParameters(): array
+    {
+        return $this->parameters;
+    }
+
+    public function getDetails(): string
+    {
+        return $this->details;
+    }
+
+    public function getProvider(): ProviderInterface
+    {
+        return $this->provider;
+    }
+}
diff --git a/lib/Provider/Amazon.php b/lib/Provider/Amazon.php
index a737f1e..fa87821 100644
--- a/lib/Provider/Amazon.php
+++ b/lib/Provider/Amazon.php
@@ -32,6 +32,7 @@
 use MacFJA\BookRetriever\Helper\ConfigurableInterface;
 use MacFJA\BookRetriever\Helper\HttpClientAwareInterface;
 use MacFJA\BookRetriever\Helper\HttpClientAwareTrait;
+use MacFJA\BookRetriever\MissingParameterException;
 use MacFJA\BookRetriever\ProviderInterface;
 // @phan-suppress-next-line PhanUnreferencedUseNormal
 use MacFJA\BookRetriever\SearchResult\SearchResultBuilder;
@@ -180,6 +181,11 @@ protected function oneCriteria(string $field, $value): array
      */
     private function doRequest(string $queryUrl): array
     {
+        MissingParameterException::throwIfMissing($this, [
+            'access_key' => $this->accessKey,
+            'associated_tag' => $this->associateTag,
+        ], 'You need an account to use this provider: https://docs.aws.amazon.com/AWSECommerceService/latest/DG/becomingAssociate.html');
+
         $client = $this->getHttpClient();
         $results = [];
         foreach (self::COUNTRY_DOMAINS as $domain) {
diff --git a/lib/Provider/DigitEyes.php b/lib/Provider/DigitEyes.php
index 01ef9c4..097e693 100644
--- a/lib/Provider/DigitEyes.php
+++ b/lib/Provider/DigitEyes.php
@@ -26,6 +26,7 @@
 use MacFJA\BookRetriever\Helper\ConfigurableInterface;
 use MacFJA\BookRetriever\Helper\HttpClientAwareInterface;
 use MacFJA\BookRetriever\Helper\HttpClientAwareTrait;
+use MacFJA\BookRetriever\MissingParameterException;
 use MacFJA\BookRetriever\ProviderInterface;
 use MacFJA\BookRetriever\SearchResult\SearchResultBuilder;
 use function sprintf;
@@ -94,6 +95,12 @@ public static function getLabel(): string
 
     public function searchIsbn(string $isbn): array
     {
+        MissingParameterException::throwIfMissing($this, [
+            'api_key' => $this->apiKey,
+            'app_code' => $this->appCode,
+            'language' => $this->language,
+        ], 'You need an account to use this provider: https://www.digit-eyes.com/cgi-bin/digiteyes.cgi?action=signup');
+
         $client = $this->getHttpClient();
         $response = $client->sendRequest(
             $this->createHttpRequest('GET', sprintf(
diff --git a/lib/Provider/Ebay.php b/lib/Provider/Ebay.php
index d756afa..98dbcf3 100644
--- a/lib/Provider/Ebay.php
+++ b/lib/Provider/Ebay.php
@@ -27,6 +27,7 @@
 use DTS\eBaySDK\Finding\Types\ProductId;
 use function in_array;
 use MacFJA\BookRetriever\Helper\ConfigurableInterface;
+use MacFJA\BookRetriever\MissingParameterException;
 use MacFJA\BookRetriever\ProviderInterface;
 use MacFJA\BookRetriever\SearchResult\SearchResultBuilder;
 use function strtoupper;
@@ -132,6 +133,12 @@ protected function oneCriteriaSearch(string $field, $value): array
 
     private function getResponse(string $field, string $value): BaseFindingServiceResponse
     {
+        MissingParameterException::throwIfMissing($this, [
+            'app_id' => $this->appId,
+            'cert_id' => $this->certId,
+            'dev_id' => $this->devId,
+        ], 'You need an account to use this provider: https://developer.ebay.com/signin');
+
         $service = new FindingService(['credentials' => [
             'devId' => $this->devId,
             'appId' => $this->appId,
diff --git a/lib/Provider/GoodReads.php b/lib/Provider/GoodReads.php
index 82ae041..fdeaad7 100644
--- a/lib/Provider/GoodReads.php
+++ b/lib/Provider/GoodReads.php
@@ -22,6 +22,7 @@
 use DateTime;
 use function is_array;
 use MacFJA\BookRetriever\Helper\ConfigurableInterface;
+use MacFJA\BookRetriever\MissingParameterException;
 use MacFJA\BookRetriever\ProviderInterface;
 use MacFJA\BookRetriever\SearchResult\SearchResultBuilder;
 use function ob_clean;
@@ -181,6 +182,10 @@ protected function getByISBN(string $isbn): array
 
     private function getResponse(string $field, string $value): array
     {
+        MissingParameterException::throwIfMissing($this, [
+            'api_key' => $this->apiKey,
+        ], 'You need an account to use this provider: https://www.goodreads.com/user/new');
+
         $goodReads = new \Nicat\GoodReads\GoodReads($this->apiKey);
 
         ob_start();
diff --git a/lib/Provider/LibraryThing.php b/lib/Provider/LibraryThing.php
index 07f9548..b608b38 100644
--- a/lib/Provider/LibraryThing.php
+++ b/lib/Provider/LibraryThing.php
@@ -23,6 +23,7 @@
 use MacFJA\BookRetriever\Helper\ConfigurableInterface;
 use MacFJA\BookRetriever\Helper\HttpClientAwareInterface;
 use MacFJA\BookRetriever\Helper\HttpClientAwareTrait;
+use MacFJA\BookRetriever\MissingParameterException;
 use MacFJA\BookRetriever\ProviderInterface;
 use MacFJA\BookRetriever\SearchResult\SearchResultBuilder;
 use function reset;
@@ -77,6 +78,10 @@ public static function getLabel(): string
 
     public function searchIsbn(string $isbn): array
     {
+        MissingParameterException::throwIfMissing($this, [
+            'api_key' => $this->apiKey,
+        ], 'You need an account to use this provider: https://www.librarything.com/services/keys.php');
+
         $client = $this->getHttpClient();
         $response = $client->sendRequest($this->createHttpRequest(
             'GET',