PHP SDK: Input could not be converted to a valid request

API Q&A
1

there are no real docs, but I used the schema from https://developer.infusionsoft.com/docs/rest/#!/Appointment/createAppointmentUsingPOST

and I get:

In RequestException.php line 113:

Client error: POST https://api.infusionsoft.com/crm/rest/v1/tasks/?access_token=1234567890 resulted in a 400 Bad Request response:
{“message”:“Input could not be converted to a valid request”}

your example:

{
  "contact_id": 0,
  "description": "string",
  "end_date": "string",
  "location": "string",
  "remind_time": 0,
  "start_date": "string",
  "title": "string",
  "user": 0
}

my data:

array:8 [
  "contact_id" => 92
  "description" => "text"
  "end_date" => DateTime @1530835200 {#1039
    date: 2018-07-06 00:00:00.0 UTC (+00:00)
  }
  "location" => ""
  "remind_time" => 0
  "start_date" => DateTime @1530748800 {#1040
    date: 2018-07-05 00:00:00.0 UTC (+00:00)
  }
  "title" => "multiday"
  "user" => 29
]

and yet, Input could not be converted to a valid request. What is wrong with the input? and what is wrong with returning a proper error messages for debug purposes?

enabling debug doesn’t help, logs show only headers and the same useless message

contact and user with those ids exist in my account

I have same error with Tasks. Only Notes are working fine (create only)