Lexecon Core

The governance control plane for AI decisions.

Kick the tires in 5 minutes:

pip install lexecon-core
python -m lexecon_core.examples.quickstart

For evidence bundles, compliance automation, and enterprise deployment:
lexecon.ai/enterprise

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What is Lexecon Core?

Lexecon Core is the proof layer: a minimal, fast policy engine with a tamper-evident ledger. It exists to answer one question: "Is this real and does it work?"

Core provides:

• Policy Engine: Graph-based deterministic evaluation (<10ms)
• Ledger: Append-only hash chain (SHA-256 linked entries)
• API: /decide and /ledger/entries endpoints

Core is Apache 2.0 licensed and designed for engineers to validate the primitive without a sales call.

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Quick Start

Install

pip install lexecon-core

Run the API

python -m lexecon_core.api.server
# Server runs at http://localhost:8000

Make a Decision

curl -X POST http://localhost:8000/decide \
  -H "Content-Type: application/json" \
  -d '{
    "actor": "ai_agent:customer_service",
    "action": "access_customer_data",
    "context": {"purpose": "support_ticket"}
  }'

Response:

{
  "decision_id": "dec_1706553600000",
  "decision": "allow",
  "reason": "Policy permits ai_agent:customer_service to perform access_customer_data",
  "timestamp": "2026-01-29T18:00:00.000000"
}

Query the Ledger

curl http://localhost:8000/ledger/entries

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Architecture

┌─────────────────────────────────────┐
│         FastAPI Server              │
├─────────────────────────────────────┤
│  PolicyEngine (graph-based)         │
│       ↓                             │
│  LedgerChain (hash-chained)         │
└─────────────────────────────────────┘

• No persistence (in-memory only)
• No authentication (add your own)
• No multi-tenancy (single tenant)
• No evidence export (see Enterprise)

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When to Upgrade to Enterprise

Trigger	Core	Enterprise
Regulator asks for evidence bundle	❌	✅ Signed ZIP with manifest
CISO needs chain verification	❌	✅ Integrity verification UI
Multi-team deployment	❌	✅ Tenant isolation
SOC2/EU AI Act compliance	❌	✅ Automated artifact generation
SIEM integration required	❌	✅ Splunk/Datadog export
Board-ready compliance reports	❌	✅ Executive dashboards

Book a 90-day pilot ($15,000)

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Documentation

• API Reference
• Policy Engine
• Ledger Design
• Enterprise Features

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License

Apache 2.0 - See LICENSE

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Built by Lexicoding Systems