I am looking for a API function as the first version of the API blockchain.info (no API key).
If there are none, I'd like you to tell me where to turn to create an API with a similar operation and a callback.
please check this API https://bitaps.com/api/
No registration required, no API keys, simple RESTfull API
To create payment address use: https://bitaps.com/api/#Create_payment_address
To handle callback: https://bitaps.com/api/#Processing_the_callback
If you need help with development contact firstname.lastname@example.org