Ledger Guard

Tier 1 Classification ● live

Cryptographic hash verification. Computes SHA-256 hashes of every payload for tamper detection and audit trail integrity.

Tier

Tier 1

Phase

Classification

Pricing

$0.000003 USDC/row

MCP Tool

ledger_guard_hash

Dependencies

the-cloak

View source on GitHub

What It Does

Ledger Guard computes SHA-256 hashes at row-level, batch-level Merkle tree roots, and pipeline-level chain hashes that link each batch to the previous one. This creates a cryptographically verifiable audit trail without the overhead of a full blockchain.

Capabilities

SHA-256 row-level hashing
Merkle tree batch verification
Hash chain linking
Tamper detection
Audit ledger storage
Bulk verification API

Example

ledger-guard-example.ts

const result = await mcp.call('ledger_guard_hash', {
  payload: maskedPayload,
  stream_uuid: streamUUID,
  granularity: 'row',
});
console.log(result.merkle_root); // "sha256:def456..."
console.log(result.chain_hash);  // links to previous batch

Configuration

ledger-guard.yaml

agent: ledger-guard
version: "1.0"
hashing:
  algorithm: SHA-256
  granularity: row
  merkle_tree: enabled
chain:
  enabled: true
  link_to_previous: true