Pymerkletools: Build Merkle trees and verify proofs

Understand the project

Practical overview

Use it when a Python application needs Merkle-tree construction and inclusion-proof operations as components of a broader integrity workflow.

Python developers implementing Merkle-based data-integrity workflows.
Developers who need to create tree roots and verify a record's inclusion using a proof.

Before you choose

The README specifies SHA-256 as the default and lists additional hash algorithms.
SHA-3 use depends on the pysha3 package; the README says it is installed as part of the module or can be installed separately.
Leaves supplied without hashing must be hexadecimal strings; non-hex values can be hashed before insertion.
The tree must be rebuilt after adding leaves or resetting it before root and proof retrieval.

Check current requirements in the official documentation. Source-based guidance does not mean OpenViST has run or independently tested this project.

Source-based practical guide

Create a tree from values, retrieve a proof for a leaf and check it against the tree root.

Python environment with the merkletools package installed using pip install merkletools.
Values to add as hexadecimal strings, or values that can be hashed with do_hash=True.

Import merkletools and create a MerkleTools object.
Add one or more leaves, enabling do_hash for non-hex input.
Call make_tree() and retrieve the root with get_merkle_root().
Retrieve a leaf proof with get_proof(index) and pass it, the target leaf hash and root to validate_proof().

A Merkle root and a boolean result indicating whether the supplied proof connects the target hash to that root.

Evidence and transparency

Source record details

Source availability: Active
Sources checked: 16 October 2026
Original website title: Tierion/pymerkletools · Official homepage title · retained in its source language