curl --request GET \
  --url https://api.gcore.com/cloud/v1/faas/runtimes/{project_id}/{region_id} \
  --header 'Authorization: <api-key>'

{
  "runtimes": {
    "go": [
      "go1.16.6"
    ],
    "python": [
      "python2.7.18",
      "python3.7.12"
    ]
  }
}