Access to the URL2Thumb API requires authentication in the form of signed request URLs. Check your user account page to view and manage your API keys.
Signing requests with your secret key shows URL2Thumb cryptographic proof that a request URL was constructed by you and only you. If someone has access to one of your signed URLs, they would not be able to succcessfully modify it because the signature verification would then fail.
If you believe your API Secret has become compromised, suspend the associated API key within your user account to prevent unauthorized usage.
Your public API key.
The HMAC-SHA256 signature of the full request URL. Sign the request using your API secret key.