I am thrilled to see the custom App Extensions feature as part of Zapier.  However, I am trying to use it with Quickbooks and seem to have run into a problem.

I am simply trying to “SEND” an estimate.  Zapier has a good integration with QBO already, but is sadly missing this very important function.

When using the App Extensions for a GET request, everything works fine.  But when I try a PUT request it fails with error 405.  From the QBO developer docs it appears that an “Authorization” header is missing.  Below are the responses provided by Zapier for each request.

{
  "request": {
    "method": "GET",
    "url": "https://quickbooks.api.intuit.com/v3/company/<realmID>/estimate/669",
    "querystring": {},
    "headers": {},
    "body": ""
  },
  "response": {
    "status": 200,
    "headers": {
      "date": "Fri, 23 Jun 2023 21:21:00 GMT",
      "content-type": "application/json;charset=utf-8",
      "transfer-encoding": "chunked",
      "connection": "keep-alive",
      "intuit_tid": "<deleted>",
      "x-spanid": "<deleted>",
      "x-amzn-trace-id": "<deleted>",
      "x-content-type-options": "nosniff",
      "x-xss-protection": "1; mode=block",
      "qbo-version": "2007.158",
      "service-time": "total=80, db=23",
      "expires": "0",
      "content-encoding": "gzip",
      "cache-control": "max-age=0, no-cache, no-store, must-revalidate, private",
      "x-envoy-upstream-service-time": "109",
      "strict-transport-security": "max-age=31536000",
      "server": "envoy"
    },
    "data": {
      "Estimate": {
        "ExpirationDate": "2023-07-23",
        "domain": "QBO",
        "sparse": false,
....

 However, when using a PUT request, I get a 405 error.

{
  "request": {
    "method": "PUT",
    "url": "https://quickbooks.api.intuit.com/v3/company/<realmID>/estimate/669/send",
    "querystring": {},
    "headers": {},
    "body": "{\n\"sparse\": true,   \n\"EmailStatus\": \"NeedToSend\",\n}"
  },
  "response": {
    "status": 400,
    "headers": {
      "date": "Fri, 23 Jun 2023 21:06:33 GMT",
      "content-type": "application/json",
      "content-length": "236",
      "connection": "keep-alive",
      "intuit_tid": "<deleted>",
      "x-spanid": "<deleted>",
      "x-amzn-trace-id": "<deleted>",
      "x-content-type-options": "nosniff",
      "x-envoy-upstream-service-time": "46",
      "strict-transport-security": "max-age=31536000",
      "server": "envoy"
    },
    "data": {
      "Fault": {
        "Error":  
          {
            "Message": "Unsupported Operation",
            "Detail": "Operation No resource method found for PUT, return 405 with Allow header is not supported.",
            "code": "500"
          }
        ],
        "type": "ValidationFault"
      },
      "time": "2023-06-23T14:06:33.695-07:00"
    },
    "body": "{\"Fault\":{\"Error\":l{\"Message\":\"Unsupported Operation\",\"Detail\":\"Operation No resource method found for PUT, return 405 with Allow header is not supported.\",\"code\":\"500\"}],\"type\":\"ValidationFault\"},\"time\":\"2023-06-23T14:06:33.695-07:00\"}"
  }
}