Endpoint Reference

Core endpoints

| Method | Path | Purpose | | --- | --- | --- | | POST | /v1/txen/normalize | Normalize raw transaction language | | POST | /v1/txen/entities | Resolve merchant/counterparty identity | | POST | /v1/txen/categorize | Assign taxonomy categories | | POST | /v1/txen/recurrence | Detect recurring transaction behavior |

Request envelope

{
  "transaction": {
    "id": "txn_123",
    "description": "DEBIT CARD MARKETPLACE",
    "amount": 48.95,
    "currency": "USD",
    "posted_at": "2026-03-20"
  }
}

Response contract

All endpoints return traceable structured fields intended for machine + operator consumption.