Invalid input JSON error when using search endpoint with (C#) System.Net.Http.HttpClient

Developer Support APIs & Integrations
1

Hi, I am experiencing a weird issue that I cannot reproduce with Postman (it works there).

Use case

I have a minimal setup (simplified) following the docs (Search the CRM - HubSpot docs) to pull off a simple search (unfiltered, unsorted) with an empty JSON body and the System.Net.Http.HttpClient. This is the code:

var httpClient = new HttpClient();
httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", "MY API TOKEN");

var request = new HttpRequestMessage(HttpMethod.Post, "https://api.hubapi.com/crm/v3/objects/contacts/search");
request.Content = JsonContent.Create("{}");
var response = httpClient.Send(request);
var responseBody = response.Content.ReadAsStringAsync().GetAwaiter().GetResult();

Problem

I am receiving this error all the time:

{"status":"error","message":"Invalid input JSON on line 1, column 1: Cannot construct instance of com.hubspot.inbounddb.publicobject.core.v3.search.PublicObjectSearchRequest$Json (although at least one Creator exists): no String-argument constructor/factory method to deserialize from String value ('{}')","correlationId":"8d449ee5-df7f-44f6-93ab-131f255826ee"}

I have tried various things with the HttpClient, but all ways lead back to this error. I cannot reproduce this error with Postman, it works perfectly there.

Help is much appreciated!

2

Hi, @Loiti :waving_hand: Thanks for reaching out and for including those details. Hey, @MPTatFoodDays @gotmike @RMones, do you have any experience or troubleshooting tips you can share with @Loiti?

Thank you! — Jaycee

3

Is there no one to help us out?

4

did you solve this issue