SYEN® Audit

Audit trail for AI systems. Record each decision. Find changes. Prove compliance.

A former security engineer at Mastercard started the company. Based in New York.

available on: AWS Marketplace | Azure Marketplace

what it does

  • locked records - every AI action gets a unique fingerprint. change the data, the fingerprint breaks. you will know.
  • linked chain - each record links to the one before it. change one, the whole chain shows it. no hiding.
  • audit ready - pull proof for any AI decision in seconds. show regulators the full sequence of events.

try the api

each AI decision gets captured, fingerprinted, linked to the record before it, and locked so no one can change it.

click each step below to see what the API returns.

Click each step to simulate the API workflow

Response 200 OK

// Awaiting request

Request Body

{
"event_type": "credit.decision.made",
"stream_id": "your-stream-id",
"payload":
{
"applicant_id": "app-991",
"decision": "APPROVED",
"score": 740
}
,
"human_review":
{
"reviewer_decision": "APPROVE",
"reviewed_at": "2026-03-16T14:00:03Z"
}
}

Response 201 Created

// Awaiting request

Response 200 OK

// Awaiting request

Response 200 OK

// Awaiting request
⚓

Daily Timestamp Anchor

Once a day, all records are anchored to a trusted timestamp authority. Independently verifiable.

Daily Anchor Record

{
"date_utc": "2026-03-15",
"anchor_status": "complete",
"anchor_created_at": "2026-03-16T00:01:04Z"
}