Should be as in the screenshot below (no Client ID required). Also, for the full list of options to include in the “Data” area, visit https://developer.bigcommerce.com/api-reference/366928572e59e-create-a-product

Let me know whether this works for you :)

still facing error 

Can you confirm that you got your access token by creating an API account in your BigCommerce control panel. According to the API reference docs, BigCommerce expects a number, and you’re giving it a string with a mix of numbers and letters (ie “qsnx04...”).

If you’re sure you are entering the correct access token, perhaps try wrapping the description field in <p> and <span> html tags (see example below)...shouldn’t be required, but let’s test the heck out of it.

<p><span>Description Text</span></p>

ok I’ll try this, but can u  tell me what is payload type and what is the work of this ? 

Ah, good question. Payload type is how the information is sent to the app. Form means that the data is encoded and sent as a URL (ie. https://api.bigcommerce...X-Auth-Token=qsnx04...&price=5) while JSON is encoded and sent as { "X-Auth-Token": "qsnx04...", "price”: 5 }. If the above suggestions above don’t work, it could be worth trying to send it in a JSON payload format.

so, In which form should I send the data?

please help me for this

Hi @RahulGupta 

According to the BigCommerce Docs, your payload needs to be JSON not form

@GetUWired & @Todd Harper  thank you so much