Here’s a direct search link (copy and paste into your browser):
https://archive.org/search?query=shabar+mantra

If results are too broad, refine to:
https://archive.org/search?query=shabar+mantra+sangrah+AND+mediatype%3Atexts

The existence of this archive creates a massive schism in the Tantric community.

For a long time, Shabar texts were hard to find outside of India or specialized libraries. Physical copies were often fragile, hand-written manuscripts or low-quality paperback prints that disintegrated quickly.

Archive.org has changed the game by hosting scanned PDFs of rare books that are often out of print. You can find decades-old publications from small publishing houses in Mumbai, Varanasi, and Delhi that specialize in Tantric and Mantric literature.

On Archive.org, you can find texts such as:

Because of their "low caste" origin, these mantras were rarely written in royal scriptures. They were passed orally. However, during the 19th and 20th centuries, wandering sadhus and printers in Varanasi and Bihar began committing them to paper—specifically, to cheap, yellowing pamphlets known as Kavachas or Tantra Saars.

Today, many of these rare, out-of-print pamphlets are being digitized and uploaded to Archive.org.

Here is the truth: Searching for "Shabar Mantra" on Google will lead you down a rabbit hole of clickbait websites, low-quality PDFs for sale, and contradictory information. But Archive.org offers something different: Primary sources.

Users have uploaded scanned copies of rare Hindi books from the 1960s and 70s—texts by authors like Sampoornanand and Dr. Narayan Dutt Shrimali—that contain hundreds of Shabar mantras for every conceivable purpose: