curl --request GET \
  --url https://sbx-{sandbox_id}-{workspace_id}.{region}.bl.run/filesystem-content-search/{path} \
  --header 'Authorization: Bearer <token>'

{
  "matches": [
    {
      "column": 10,
      "line": 42,
      "path": "src/main.go",
      "text": "const searchText = 'example'",
      "context": "previous line\ncurrent line\nnext line"
    }
  ],
  "query": "searchText",
  "total": 5
}