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POPayPal API: Exception: 401 when accessing https://api.sandbox.paypal.com/v1/oauth2/token
 

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  1. POPayPal API: Exception: 401 when accessing https://api.sandbox.paypal.com/v1/oauth2/token
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    <p>The specific <code>401</code> error message I get is:</p> <p><code>"error":"invalid_client","error_description":"The client credentials are invalid"}"</code></p> <p>This error isn't listed anywhere in the PayPal documentation. I am certain I am using the test credentials and using the correct sandbox endpoint. The error occurs when I attempt to get an access token. </p> <p>This is the class where the access token is retrieved:</p> <pre><code>private function _generateAccessToken($config) { $base64ClientID = base64_encode($this-&gt;clientId . ":" . $this-&gt;clientSecret); $headers = array( "User-Agent" =&gt; PPUserAgent::getValue(RestHandler::$sdkName, RestHandler::$sdkVersion), "Authorization" =&gt; "Basic " . $base64ClientID, "Accept" =&gt; "*/*" ); $httpConfiguration = $this-&gt;getOAuthHttpConfiguration($config); $httpConfiguration-&gt;setHeaders($headers); $connection = PPConnectionManager::getInstance()-&gt;getConnection($httpConfiguration, $config); //print_r($connection); die; $res = $connection-&gt;execute("grant_type=client_credentials"); $jsonResponse = json_decode($res, true); if($jsonResponse == NULL || !isset($jsonResponse["access_token"]) || !isset($jsonResponse["expires_in"]) ) { $this-&gt;accessToken = NULL; $this-&gt;tokenExpiresIn = NULL; $this-&gt;logger-&gt;warning("Could not generate new Access token. Invalid response from server: " . $jsonResponse); } else { $this-&gt;accessToken = $jsonResponse["access_token"]; $this-&gt;tokenExpiresIn = $jsonResponse["expires_in"]; } $this-&gt;tokenCreateTime = time(); return $this-&gt;accessToken; } </code></pre> <p>This is the <code>$connection</code> variable I have when I <code>print_r</code> (I removed the authorization string):</p> <pre><code>PayPal\Core\PPHttpConnection Object( [httpConfig:PayPal\Core\PPHttpConnection:private] =&gt; PayPal\Core\PPHttpConfig Object ( [headers:PayPal\Core\PPHttpConfig:private] =&gt; Array ( [User- Agent] =&gt; PayPalSDK/rest-sdk-php 0.6.0 (lang=PHP;v=5.4.21;bit=64;os=Linux_2.6.18- 308.16.1.el5;machine=x86_64;openssl=0.9.8e-fips-rhel5;curl=7.24.0) [Authorization] =&gt; Basic REMOVED AUTHORIZATION STRING == [Accept] =&gt; */* ) [curlOptions:PayPal\Core\PPHttpConfig:private] =&gt; Array ( [32] =&gt; 3 [78] =&gt; 30 [19913] =&gt; 1 [13] =&gt; 60 [10018] =&gt; PayPal-PHP-SDK [10023] =&gt; Array ( ) [81] =&gt; 2 [64] =&gt; 1 ) [url:PayPal\Core\PPHttpConfig:private] =&gt; https://api.sandbox.paypal.com/v1/oauth2/token [method:PayPal\Core\PPHttpConfig:private] =&gt; POST [retryCount:PayPal\Core\PPHttpConfig:private] =&gt; 1 ) [logger:PayPal\Core\PPHttpConnection:private] =&gt; PayPal\Core\PPLoggingManager Object ( [loggerName:PayPal\Core\PPLoggingManager:private] =&gt; PayPal\Core\PPHttpConnection [isLoggingEnabled:PayPal\Core\PPLoggingManager:private] =&gt; 1 [loggingLevel:PayPal\Core\PPLoggingManager:private] =&gt; 3 [loggerFile:PayPal\Core\PPLoggingManager:private] =&gt; PayPal.log )) </code></pre> <p>As far I can tell, I have correct credentials, correct endpoint, not sure what else it could be?</p>
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      1. POPayPal API: Exception: 401 when accessing https://api.sandbox.paypal.com/v1/oauth2/token
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    1. COI'm also having this problem. My sandbox accounts were working just fine last week, but now all of a sudden, they're not.
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    2. COPlease let me know if you find a solution, I'll do the same!
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    3. COWell crap, my issue ended up being a WordPress problem: I was trying to hit the live API, not the Sandbox API. That's what "credentials" means, apparently: the API settings, not the card number, which I suspected at first. You're not using WordPress too, are you?
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