Hi everyone, I’m trying to use API to do the following thing: import contacts from CSV file in my local disk. But, I get Error 400 Bad Request and I don’t know why. I checked everything but it seems like everything is correct. Here is my code: date_subdir= "2022-10-17" #subdirectory in which my file is located filename= "2022-09-17 to 2022-10-16 match.csv" parent_dir= r"H:\My Drive\1. Digital Marketing\sync hubspot erwin master" from pathlib import Path import requests import json import os url = "https://api.hubapi.com/crm/v3/imports" ACCESS_TOKEN = "my private app access token"; headers = { 'content-type': 'multipart/form-data', 'authorization': 'Bearer %s' % ACCESS_TOKEN } data = { "name": filename.split('.')[0], #returns 2022-09-17 to 2022-10-16 match, the import name i want "files": [ { "fileName": filename, #returns 2022-09-17 to 2022-10-16 match.csv "fileFormat": "CSV", # "dateFormat": "DAY_MONTH_YEAR", #there's no date in my file though "fileImportPage": { "hasHeader": True, "columnMappings": [ { "columnObjectTypeId": "0-1", "columnName": "Record ID", "propertyName": "hs_object_id", "idColumnType": "HUBSPOT_OBJECT_ID" }, { "columnObjectTypeId": "0-1", "columnName": "Phone Number", "propertyName": "phone", "idColumnType": False }, { "columnObjectTypeId": "0-1", "columnName": "Email", "propertyName": "email", "idColumnType": "HUBSPOT_ALTERNATE_ID" }, { "columnObjectTypeId": "0-1", "columnName": "Lifecycle Stage", "propertyName": "lifecyclestage", "idColumnType": False }, { "columnObjectTypeId": "0-1", "columnName": "Learning Preference", #a custom property i made for my use "propertyName": "learning_preference", "idColumnType": False }, { "columnObjectTypeId": "0-1", "columnName": "Is TMK Call?",#a custom property i made for my use "propertyName": "is_tmk_call_", "idColumnType": False } ] } } ] } datastring = json.dumps(data) payload = {"importRequest": datastring} absolute_file_path = Path(parent_dir, date_subdir, filename) #returns WindowsPath('H:/My Drive/1. Digital Marketing/sync hubspot erwin master/2022-10-17/2022-09-17 to 2022-10-16 match.csv'), which is correct files = [ ('files', open(absolute_file_path, 'rb')) ] print(files) response = requests.request("POST", url, data=payload, files=files, headers=headers) print(response.text.encode('utf8')) print(response.status_code) the error i get: [('files', )] Error 400 Bad Request Any idea? Thanks in advance.

Hi, @danjelito :waving_hand: Have you tried using Postman as shown in the example here? — Start an import It may help us root out any additional issues. Best, Jaycee

Hi @Jaycee_Lewis , not yet, currently I’m trying to use Python from my local computer to run above script. Do I have to use Postman to run this?

Hi Anya, I’m encountering similar issues, and I’m wondering if you’ve figured this out? Thanks!

API Contact Import Error (Error 400 Bad Request)

Develop, Build & Integrate APIs & Integrations

Anya23 March 27, 2025, 2:39pm 4

This is an old post. Did you ever get it worked out? Usually a 400 error includes Content that contains an error message. Are you able to see that with this error?

Topic		Replies	Views
Import API - 400 Bad Request APIs & Integrations contacts	1	1173	August 16, 2023
Import API 400 Bad Request no meaningful error message APIs & Integrations contacts	3	1138	May 6, 2025
400 Error on POST to Contacts API APIs & Integrations contacts	4	4259	November 12, 2023
"Bad Request" error when importing company data APIs & Integrations companies	3	1272	July 3, 2025
Getting 400 Bad Request APIs & Integrations crm , contacts	6	9076	October 19, 2022

API Contact Import Error (Error 400 Bad Request)

Related topics