I apologize for informing you that you cannot access the order API until you generate it with the above link I shared. Please consult your web developer so that you can integrate the order API.
I understand your concern, but there isn't a specific order API key. You need to generate your API keys using the link I shared with you initially, and then, with the assistance of your developer, you can integrate it into your website.
API KEY :
rzp_live_TYFGvMCvpsC2bB
https://razorpay.com/docs/payments/orders/apis/