Hi @Sandy Rai
Welcome to the Atlassian Community.
You can find the information on how to do this here: https://developer.atlassian.com/cloud/jira/platform/rest/v3/api-group-projects/#api-rest-api-3-project-post
Or if you're on Server/Data Center you can find it here: https://confluence.atlassian.com/jirakb/creating-projects-via-rest-api-in-jira-963651978.html
Cheers,
Peter
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