# CreditTransaction

> The CreditTransaction object.

| Field | Type | Description |
|---|---|---|
| `agent_id` | string (uuid) or null |  |
| `amount` | number | Credits: positive adds, negative spends. |
| `balance_after` | number |  |
| `conversation_id` | string (uuid) or null |  |
| `created_at` | string (date-time) |  |
| `description` | string |  |
| `id` | string (uuid) |  |
| `kind` | string | What moved credit. Spending it: `conversation`, `analysis`, `extraction`, `knowledge`, `evaluation`. Adding it: `grant`, `refund`. Corrections: `removal`, `adjustment`. More kinds may be added. |
| `livemode` | boolean | False for what a test key spent. |
| `object` | `credit_transaction` |  |
| `project_id` | string (uuid) or null |  |