# Further Information This library uses the following api: to verify the hashes and fingerprints for http2 and ja3. Be aware that also peets api does not show every extension/cipher a TLS client is using. Do not rely just on ja3 strings. The API does not include the GREASE Extenson into the ja3 string. It’s omitted on purpose. Always have a look at the extension list and not only on the ja3 string. Show some love for peet here: If you appreciate my work feel free to [buy me a coffee](https://www.buymeacoffee.com/CaptainBarnius) or donate some money to charity.