|API credentials used in the wrong environment
|Create separate users and separate API credentials for Sandbox (sandbox.coingate.com) or Live (coingate.com) environments
|Wrong API credentials
|Please check if you have entered them correctly; make sure that there are no spaces before or after the text.
|Wrong API credentials signature, invalid order, etc.
|You can see the details of a specific API request issue by logging in to your CoinGate account and going to API » Requests
|API requests are coming from a different IP address(es) than the IPs that were whitelisted when creating API credentials when creating
|If IP whitelisting is desired, log in to your CoinGate account, visit API » Apps and clicking Edit next to your API credentials; make sure the whitelisted IPs match the IPs your requests are coming from
|cURL or another library used to communicate with the CoinGate API is working incorrectly, or is outdated
|Please check your library version
|Your server cannot reach coingate.com
|Check if coingate.com is available and if your server can reach it (also see Status Page)
You can see your API Request logs by locating API » Requests in the menu of your CoinGate account.
|Your server is on a private network, for example localhost
|Make sure that your application is publicly accessible
|Your website is disabled or in maintenance mode
|Make sure your website is accessible
|Your server firewall, third-party security service (Cloudflare, Incapsula, etc.) or your application is blocking CoinGate IP address(es)
|Verify that CoinGate IP address(es) are allowed by your server firewall, third-party security services and your application
You can check the specific reason why Payment Callback was not sent by logging in to your CoinGate account and locating API » Payment Callbacks in the menu.