I have an external application and I am trying to pass through a value using the Rest API URL queries, everything on it works, but when I try to add this one field (it is not custom), it sends me a 400 Bad Request.

The censored's are just more fields, I can't show due to compliance. If I were to remove IsAllDayEvent, it works, once I add it, the 400 appears again, and I double checked with Workbench to make sure I am using the right name. the {}'s are variables with values being passed.

$"{{\"censored\":\"{censored}\", \"IsAllDayEvent\":\"{isAllDayEvent}\", \"censored\":\"{censored}\", \"censored\":\"{censored}\", \"censored\":\"{censored}\", \"censored\":\"censored\", \"censored\":\"{censored}\", \"censored\":\"{censored}\"}}";

1 Answer 1


It's expecting a Boolean value, not a String, as this is a Checkbox field. Remove the quotes.

$"{... \"IsAllDayEvent\":{isAllDayEvent}, ...}";

For future reference, this is also true for number fields, such as currency.

  • Thank you, it didn't solve my problem, but you are right, I was doing it the wrong way. But the reason it is throwing a 400, is because in salesforce, if you select "All Day Event" then you can't have an enddatetime or startdatetime, which i had censored out. I am trying to send all day event AND the time's up. I will have to do some logic on my end to sort it out, but thanks!
    – CodyB
    Feb 26, 2020 at 16:09
  • @CodyB I'm just glad I could help point you in the right direction.
    – sfdcfox
    Feb 26, 2020 at 16:12
  • I put the logic in for it and the values being passed into it are correct, it is still not liking what I am trying to send. Im quite lost because this is a Salesforce issue that I cannot resolve. I have tried sending it as a boolean and as a string, even with different datetime formats.
    – CodyB
    Feb 26, 2020 at 19:09
  • @CodyB Check your "field level security" on the field. I found out it was disabled in my org, and that may be your problem to. Go to Setup > Object Manager > Event > Fields > All Day Event, and check the Field Level Security. You can't use the field if it is not Visible.
    – sfdcfox
    Feb 26, 2020 at 19:28
  • @CodyB Here's an example I used in workbench, so I know it works: { "subject": "Demo", "isAllDayEvent": true, "activityDate": "2020-01-01T00:00:00.000Z" }
    – sfdcfox
    Feb 26, 2020 at 19:29

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