Few important details on API /contacts/bulk_create/

• Bulk create API has rate limit of 1 call per minute. So you can't call this API at high rates.
• If your API request is throttled, we return the details of when the API is free to accept the next request.
• All submitted imports will get processed one at a time. So even if you submit 5 CSV files by making the API call 5 times, the import will finish the first CSV file, then go for the second one, so on and so forth.
• Either Upload file or CSV url is required.
• Tags column in CSV should in format of comma separated tags.
• Mapping is in format {"field":"index"}; E.g. if Contact No. is 3rd column in CSV Mapping is {"0":"2"}
• Mapping for column to field is as follows:-
  CONTACT = 0
  MOBILE = 1
  LAST_NAME = 2
  FIRST_NAME = 3
  EMAIL = 4,
  COUNTRY_CODE = 5
  ADDRESS = 6
  CITY = 7
  STATE = 8
  ZIPCODE = 9
  JOB_TITLE = 10
  COMPANY_NAME = 11
  COMPANY_WEBSITE = 12
  NAME = 13
  ADDITIONAL_VARS = 14
  TAGS = 16