Have you seen the Maker channel? https://ifttt.com/maker
That combined with the Date & Time channel would probably do a lot of what you want.
That combined with the Date & Time channel would probably do a lot of what you want.
For example, does it store OAuth tokens and refresh on your behalf?
Have you thought about at least adding support for authentication where the credentials are generated by IFTTT? (Similar to the "secret" that you use for the trigger) This would allow makers to protect their endpoints while still disallowing spoofed requests.