curl --request POST \
  --url https://api.planetscale.com/v1/organizations/{organization}/databases/{database}/branches/{branch}/keyspaces \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '{
  "name": "<string>"
}'

{
  "id": "<string>",
  "name": "<string>",
  "shards": 123,
  "sharded": true,
  "replicas": 123,
  "extra_replicas": 123,
  "created_at": "<string>",
  "updated_at": "<string>",
  "cluster_name": "<string>",
  "cluster_display_name": "<string>",
  "resizing": true,
  "resize_pending": true,
  "ready": true,
  "metal": true,
  "default": true,
  "imported": true,
  "vector_pool_allocation": 123,
  "replication_durability_constraints": {
    "strategy": "available"
  },
  "vreplication_flags": {
    "optimize_inserts": true,
    "allow_no_blob_binlog_row_image": true,
    "vplayer_batching": true
  }
}