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ProvenLog captures every AI agent action into a hash-chained audit trail — like a blockchain for your agent’s behavior. Each event is cryptographically linked to the previous one, making tampering detectable and providing a verifiable record of everything your agent did.

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Why ProvenLog

AI agents call tools, write files, send messages, and make decisions autonomously. When something goes wrong, you need an answer: what did the agent do, and can you prove it?
  • Hash chain integrity — SHA-256 linked events, tamper-evident by design
  • Merkle tree verification — global integrity proof across all agent chains
  • Verifiable exports — portable .plog evidence packages auditors can verify offline
  • RFC 3161 timestamping — third-party proof that records existed at a given time
  • PII/PHI redaction — 17 built-in patterns for emails, SSNs, API keys, credit cards
  • Framework-native — drop-in integrations for LangChain, CrewAI, OpenAI, Anthropic, AG2, LangGraph
  • Zero-code options — MCP proxy, OTLP receiver, Claude Code hooks
  • Embedded or server — local SQLite with no setup, or a server for multi-agent visibility

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Get started

Quickstart

Get up and running in under 3 minutes with zero code changes.

Installation

Install the CLI, Python SDK, or TypeScript SDK.

Python SDK

Explicit instrumentation with the Python client.

TypeScript SDK

Instrument your TypeScript agents.

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Core concepts

Events

Understand the ProvenLogEvent schema and action types.

Hash Chains

How SHA-256 hash chains provide tamper evidence.

Merkle Trees

Global integrity proofs across all agent chains.

Operating Modes

Embedded (local SQLite) vs Server mode.

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Architecture

+-------------------------------------------------------------+
|                        Capture Layer                         |
|  plog run  .  provenlog.auto  .  Python SDK  .  TS SDK      |
|  MCP Proxy  .  OTLP  .  Claude Code Hook  .  OpenClaw       |
+-----------------------------+-------------------------------+
                              |
                       +------v------+
                       |   Pipeline   |
                       |  Validate    |
                       |  Redact PII  |
                       |  Hash Chain  |
                       |  Merkle Tree |
                       +------+------+
                              |
                       +------v------+
                       |   Storage    |
                       |   SQLite     |
                       +------+------+
                              |
                 +------------+------------+
                 |            |            |
           +-----v----+ +----v-----+ +----v----+
           |  REST API | |Dashboard | |   CLI   |
           |  /v1/*    | |  React   | |  plog   |
           +----------+ +----------+ +---------+