A simple job scheduler backed by Postgres used in production at https://operand.ai. Setup needs two environment variables, SECRET and ENDPOINT. The secret is attached to incoming/outgoing requests within the Scheduler-Secret HTTP header, and is used both by the scheduler to verify that incoming request is legit, as well as the end-application to verify the request is coming from the scheduler. The endpoint is simply the URL to send HTTP requests to.

Example Usage:

Scheduling a Job

POST https://scheduler.yourcompany.com/insert
Headers: Scheduler-Secret=XXXXXX

{
    "timestamp": "2021-04-15T14:17:00-07:00",
    "body": {
        "foo": "bar"
    }
}

Response:
{"id":"cknjdu2k300153zugmucamxxo"}

Cancelling a Scheduled Job (note: if the job doesn't exist, this will fail silently.)

POST https://scheduler.yourcompany.com/delete
Headers: Scheduler-Secret=XXXXXX

{
    "id":"cknjdu2k300153zugmucamxxo"
}

Response: None

And that's it! Feel free to file issues or do pull requests.