Hi @Alexandre_Leduc,
Are you including the content-type header? I wonder if you’re erroneously getting a 200 response due to this behavior:
Deal creation API - response is 200, but the deal is not created Deals
Yes, the only difference between a working request and a failing request was the content-type header. Requests to Contacts API work fine also without the content-type header. For example the following works fine: r1 = requests.post(‘https://api.hubapi.com/contacts/v1/contact/?hapikey=’ + apiKey, data=json.dumps(contact)) Bests