POST
orinoco/api/v1/send
{
  "token": "123123thisisyourexampletoken123123",
  "from": "examplefrom@exampledomain.com",
  "subject": "this is not spam at all",
  "to": [
    "firstdestiny@thisdomain.com",
    "seconddestiny@thatdomain.com"
  ],
  "body": {
    "plain": "hi ${CustName} this the example e-mail... ${TotalPending} .. ${DueDays}",
    "html": "<div> hi ${CustName} this the example e-mail... ${TotalPending} .. ${DueDays} </div>"
  },
  "data": [
    {
      "CustName": "First This",
      "TotalPending": "12,345,678.90",
      "DueDays": "40"
    },
    {
      "CustName": "Second That",
      "TotalPending": "1,678.00",
      "DueDays": "80"
    }
  ],
  "callbackurl": "http://yoursite.com/some/way/to/call/you/back/<123messageid123>"
}

Response/ POST callback:
{
    "email": "123emailId123",
    "status": “accepted/rejected”,
    "reason": "all OK! ty :) / UNAUTHORIZED GTFO"
}


##############################

GET
orinoco/api/v1/check

{
  "token": "123123thisisyourexampletoken123123",
  "email": "123emailId123"
}


RESPONSE:

{
    "email": "123emailId123",
    "status": “queued / delivered / failed”,
    "reason": "Queued / Waiting for send / UNAUTHORIZED GTFO"
}


#######################################

GET
orinoco/api/v1/tracking

{
  "token": "123123thisisyourexampletoken123123",
  "email": "123emailId123"
}

RESPONSE:

{
  "id": "123emailId123",
  "from": "sender@example.com",
  "subject": "example subject",
  "tos": [
    "recipient.email@example.com",
    "recipient2.email2@example2.com"
  ],
  "tracking": [
    {
      "opens": 22
    },
    {
      "opens": 0
    }
  ],
  "status": [
    {
      "reason": "all ok! :)",
      "status": "opened"
    },
    {
      "reason": "cant reach domain example2.com",
      "status": "failed"
    }
  ]
}