The one drawback to this is you must pass in your unique AIO key as a query parameter which could then be cached somewhere along the way, and used to gain access to your data. That being said, if you're not doing anything mission critical, this is just another way you can interact with Adafruit IO.
Send Data
An example to send data (simple GET request):
https://io.adafruit.com/api/groups/weather/send.json?x-aio-key=a052ecc32b2de1c80abc03bd471acd1d6b218e5c&temperature=13&humidity=12&wind=45
Let's break that down into the core components.
https://io.adafruit.com/api/groups/:group_name/send.json
The group_name will be created automatically, or found and used, if it already exists.
?x-aio-key=1234567890&feed_name=value&feed_name=value
feed_name: This is the name of a new or existing feed. A new feed will be created automatically for you.
value: The new value to be stored.
Receive Data
You can receive data from a group with a get request as well.
An example (simple GET request):
https://io.adafruit.com/api/groups/weather/receive.json?x-aio-key=a052ecc32b2de1c80abc03bd471acd1d6b218e5c