The official HP Instant Ink website for subscription service and related information is available at **https://www.hp.com/us-en/shop/cv/instantink**. This site offers details on plans starting as low as $1.79 per month, how the service works, printer compatibility, recycling options, and the ability to start or manage your subscription[1].

Additional key points about HP Instant Ink from the official sources include:

– HP Instant Ink is a subscription service that automatically delivers ink when your printer detects low ink, based on the number of pages you print monthly rather than cartridges[1][3][5].

– Plans can be changed or canceled at any time, and you can save unused printing pages as rollover pages to use later[3].

– Most HP printers made in the last 5 years with Wi-Fi capability are compatible with Instant Ink[1][5].

– Customers receive a Welcome Kit with special cartridges that only work with Instant Ink, and used cartridges can be recycled through prepaid envelopes included in the service[1][3][5].

– HP also offers optional paper delivery as an add-on to the ink subscription plan[5].

If you experience issues accessing the Instant Ink website, such as continuous loading or failure to display account information, this may sometimes occur due to temporary site problems or connectivity issues, as reported by some users[2].

For managing your subscription, checking printer compatibility, or signing up for the service, the primary and authoritative source is the HP Instant Ink official page: https://www.hp.com/us-en/shop/cv/instantink[1].