Does kubernetes has an api that can create multiple kind resources at the same time

I can also accept if there's a way to post my yaml file to kubernetes api and create all resources in it

Then you can simply concatenate all individual yaml files into one big yaml file but each separted by --- in between.

For example to install kubernetes-dashboard you simply use: kubectl apply -f https://raw.githubusercontent.com/kubernetes/dashboard/master/src/deploy/recommended/kubernetes-dashboard.yaml, examination of this yaml file reveals structure you need (excerpt below):

...# ------------------- Dashboard Secret ------------------- #apiVersion: v1kind: Secretmetadata:  labels:    k8s-app: kubernetes-dashboard  name: kubernetes-dashboard-certs  namespace: kube-systemtype: Opaque---# ------------------- Dashboard Service Account ------------------- #apiVersion: v1kind: ServiceAccountmetadata:  labels:    k8s-app: kubernetes-dashboard  name: kubernetes-dashboard  namespace: kube-system---# ------------------- Dashboard Role & Role Binding ------------------- #kind: RoleapiVersion: rbac.authorization.k8s.io/v1metadata:  name: kubernetes-dashboard-minimal...

where each block between comments could be separate yaml file. Note that comments are optional and separator between contents of individual yaml files is ---.

Just some sidenotes:

• although this is somewhat practical for final deployments, if you glue all of your individual yaml files into such a mega-all-in-one.yaml file then everything you do to it - (create/update/apply/delete...) you do to all resources listed inside.
• If it is not "shared" file to be executed from some network resource, it then may be easier to use --recursive switch to kubectl as detailed in the official documentation and run against folder that contains all individual yaml files. This way you retain capability to individually pick any yaml file, and can deploy/delete/apply... all at once if you choose so...