API Calls Scheduler as a Service

Hello!
This idea came to my mind a few weeks ago and I would like to hear what fellow devs think about it.
While working on my app Micro CRM (shameless plug: https://microcrm.cc). I needed a way to send emails to my users when they needed to follow up with a contact. It made me realize that they might be a possible market for this since as developers we often need to schedule API calls at certain times.
Basically the service will do the following:

• Simple REST API to programmatically schedule the HTTP requests by setting time, date, recurrence, url to call as well as headers and possibly json body (or binary). It will also allow to manage (update, delete) scheduled jobs

• A UI to manually setup HTTP requests, manage them and monitor

Basically what a few other people called it: CRON as a Service for Web Apps and Backends

Possible use cases:

• Send a request to a webhook periodically

• Send scheduled notifications to your users on their birthday

• Reminders apps

• Send recurring automatic messages , calls to users

I know other services like IFTTT and Zapier, etc but in my knowledge they do not offer a simple solution to setup scheduled rest calls programmatically within your app/backend as well as monitoring. Additionally from what I see their free tiers are quite limited in the number of tasks you can create. An app that need to schedule a large amount of HTTP calls might not be able to use those services and will need to hack around to make it work.

What do you guys think ? Would you pay for something like this ?? If you already use something for this problem can you tell me what it is and if you have any issues with it ???

I built a Google Form to collect emails of people interested to use this. if you'd like to be notified when the first version is out add your email. I WILL NOT SPAM YOU! https://forms.gle/QX1dTqC2UqWVruZY7