What are some consideration while using composite Resource for inbound integration

Hi @Babitha Kurian, 

Composite resource is a powerful tool that allows you to execute multiple REST API requests in a single call, which can improve the performance and efficiency of your integration. BUT there are some limitations and trade-offs you should be aware of:

• The maximum number of subrequests per composite request is 25.
• The maximum depth of nested subrequests is 5.
• The maximum payload size of a composite request is 4 MB.
• The maximum payload size of a subrequest is 1 MB.
• The maximum payload size of a subresponse is 15 MB.
• The composite request counts as one API call, but each subrequest counts as an additional API call against your daily limit.
• The composite request and all its subrequests must use the same API version.

See: 

• Composite | REST API Developer Guide | Salesforce Developers
• Salesforce Composite resources - Apex Hours