An additional tool for reporting available tunnels is available for application programmers/embedded systems folks. This has actually been around for a while, but not well documented.
https://USERNAME:PASSWORD@tunnelbroker.net/tunnelInfo.php[?tid=TUNNELID]
This returns the configuration information in XML format. One tunnel block per tunnel if no ID specified, or one tunnel block for the specified tunnel id.
<?xml version="1.0" encoding="UTF-8"?>
<tunnels>
<tunnel id="TID">
<description>DESCRIPTION</description> (as defined in the site)
<serverv4>SERVER_IPv4</serverv4>
<clientv4>CLIENT_IPv4</clientv4>
<serverv6>SERVER_IPv6</serverv6>
<clientv6>CLIENT_IPv6</clientv6>
<routed64>ROUTED_64_PREFIX/64</routed64>
<routed48>ROUTED_48_PREFIX/48</routed48> (exists if one assigned)
<rdns1>DNS1</rdns1> (exists if assigned)
<rdns2>DNS2</rdns2> (exists if assigned)
<rdns3>DNS3</rdns3> (exists if assigned)
<rdns4>DNS4</rdns4> (exists if assigned)
<rdns5>DNS5</rdns5> (exists if assigned)
</tunnel>
</tunnels>