Would you like a list of verified temples or a safer alternative protective stotra (like Durga Saptashati or Narasimha Kavacham) that is widely available in PDF form?
Sources and authenticity
The Pratyangira Mala Mantra is:
(Deeksha) before chanting the full Mala Mantra, though the basic Gayatri is generally considered safe for all sincere seekers. Sri Maha Pratyangira Devi pratyangira mala mantra pdf