Eventbridge Scheduler

Hi I might be misreading your question, but it sounds like you're literally passing {"EndpointId":"string","Entries":[{"Detail":"string","DetailType":"string","EventBusName":"string","Resources":["string"],"Source":"string","Time": 0,"TraceHeader":"string"}]}, which is the template format defined at https://docs.aws.amazon.com/eventbridge/latest/APIReference/API_PutEvents.html.

You need to pass real values as defined in the above page.

If you are already actually passing real values, what are they?

I've not got the full idea what you are actually trying. But if you are trying to put events on the desired EventBusName using PutEvents [1] api call for the EventBridge service. Then you can follow the below steps:

1. Create a rule in eventbridge. You can use a sample event 'AWS events -> Scheduled Events' or you can provide your own sample message like below [1] (mentioned keys in the below json are the min required fields):

{
  "version": "0",
  "id": "89d1a02d-5ec7-412e-82f5-13505f849b41",
  "detail-type": "Scheduled Event",
  "source": "com.mycompany.myapp",
  "account": "123456789012",
  "time": "2023-04-28T00:39:04Z",
  "region": "us-east-1"
}

2. Then in the event patter you can mention the desired pattern, the bare minimum could be like below:

{
  "source": ["com.mycompany.myapp"]
}

I've tested the above and it's working fine on the sandbox also when I put the event using the aws cli. Let me know if you still have any questions.

[1] https://docs.aws.amazon.com/eventbridge/latest/APIReference/API_PutEvents.html#eventbridge-PutEvents-request-Entries