https://community.hubspot.com/t5/APIs-Integrations/Exchange-authorization-code-for-tokens-HTTP-ERROR-415/m-p/377051#M37058 <P>Below PHP code to exchange authorization code for token, Please help on this:</P><P>&nbsp;</P><PRE><SPAN>$code = $_GET['code'];<BR /><BR />$url </SPAN><SPAN>= </SPAN><SPAN>"https://api.hubapi.com/oauth/v1/token"</SPAN><SPAN>;<BR /></SPAN><BR /><SPAN>$post_fields </SPAN><SPAN>= </SPAN><SPAN>array</SPAN><SPAN>(</SPAN><SPAN>'form' </SPAN><SPAN>=&gt;<BR /></SPAN> <SPAN>array</SPAN><SPAN>(<BR /></SPAN> <SPAN>'grant_type' </SPAN><SPAN>=&gt; </SPAN><SPAN>'authorization_code'</SPAN><SPAN>,<BR /></SPAN> <SPAN>'client_id' </SPAN><SPAN>=&gt; </SPAN><SPAN>CLIENT_ID</SPAN><SPAN>,<BR /></SPAN> <SPAN>'client_secret' </SPAN><SPAN>=&gt; </SPAN><SPAN>CLIENT_SECRET</SPAN><SPAN>,<BR /></SPAN> <SPAN>'redirect_uri' </SPAN><SPAN>=&gt; </SPAN><SPAN>REDIRECT_URI</SPAN><SPAN>,<BR /></SPAN> <SPAN>'code' </SPAN><SPAN>=&gt; </SPAN><SPAN>$code<BR /></SPAN> <SPAN>)<BR /></SPAN><SPAN>);<BR /></SPAN><SPAN>$post_fields </SPAN><SPAN>= </SPAN><SPAN>json_encode</SPAN><SPAN>(</SPAN><SPAN>$post_fields</SPAN><SPAN>);<BR /></SPAN><SPAN><BR /></SPAN><SPAN>$headers </SPAN><SPAN>= </SPAN><SPAN>array</SPAN><SPAN>(<BR /></SPAN> <SPAN>"Accept:application/json"</SPAN><SPAN>,<BR /></SPAN> <SPAN>"Content-Type:application/json"</SPAN><SPAN>,<BR /></SPAN><SPAN>);<BR /></SPAN><SPAN><BR /></SPAN><SPAN><BR /></SPAN><SPAN>$ch </SPAN><SPAN>= </SPAN><SPAN>curl_init</SPAN><SPAN>( </SPAN><SPAN>$url </SPAN><SPAN>);<BR /></SPAN><SPAN>curl_setopt</SPAN><SPAN>( </SPAN><SPAN>$ch</SPAN><SPAN>, </SPAN><SPAN>CURLOPT_POST</SPAN><SPAN>, </SPAN><SPAN>true </SPAN><SPAN>);<BR /></SPAN><SPAN>curl_setopt</SPAN><SPAN>( </SPAN><SPAN>$ch</SPAN><SPAN>, </SPAN><SPAN>CURLOPT_POSTFIELDS</SPAN><SPAN>, </SPAN><SPAN>$post_fields</SPAN><SPAN> );<BR /></SPAN><SPAN>curl_setopt</SPAN><SPAN>( </SPAN><SPAN>$ch</SPAN><SPAN>, </SPAN><SPAN>CURLOPT_RETURNTRANSFER</SPAN><SPAN>, </SPAN><SPAN>1 </SPAN><SPAN>);<BR /></SPAN><SPAN>curl_setopt</SPAN><SPAN>( </SPAN><SPAN>$ch</SPAN><SPAN>, </SPAN><SPAN>CURLOPT_HEADER</SPAN><SPAN>, </SPAN><SPAN>true</SPAN><SPAN>);<BR /></SPAN><SPAN>curl_setopt</SPAN><SPAN>( </SPAN><SPAN>$ch</SPAN><SPAN>, </SPAN><SPAN>CURLOPT_HTTPHEADER</SPAN><SPAN>, </SPAN><SPAN>$headers </SPAN><SPAN>);<BR /></SPAN><SPAN>curl_setopt</SPAN><SPAN>( </SPAN><SPAN>$ch</SPAN><SPAN>, </SPAN><SPAN>CURLOPT_SSL_VERIFYHOST</SPAN><SPAN>, </SPAN><SPAN>0 </SPAN><SPAN>);<BR /></SPAN><SPAN>curl_setopt</SPAN><SPAN>( </SPAN><SPAN>$ch</SPAN><SPAN>, </SPAN><SPAN>CURLOPT_SSL_VERIFYPEER</SPAN><SPAN>, </SPAN><SPAN>0 </SPAN><SPAN>);<BR /></SPAN><SPAN><BR /></SPAN><SPAN>$page </SPAN><SPAN>= </SPAN><SPAN>curl_exec</SPAN><SPAN>(</SPAN><SPAN>$ch</SPAN><SPAN>);<BR /></SPAN><SPAN>$info </SPAN><SPAN>= </SPAN><SPAN>curl_getinfo</SPAN><SPAN>(</SPAN><SPAN>$ch</SPAN><SPAN>);<BR /></SPAN><SPAN><BR /></SPAN><SPAN>var_dump</SPAN><SPAN>(</SPAN><SPAN>$page</SPAN><SPAN>);<BR /></SPAN><SPAN>var_dump</SPAN><SPAN>(</SPAN><SPAN>$info</SPAN><SPAN>);</SPAN></PRE> Wed, 07 Oct 2020 15:28:20 GMT Drace 2020-10-07T15:28:20Z