> ## Documentation Index
> Fetch the complete documentation index at: https://docs.tracelm.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Schema Versions

> List available observability schema versions

Returns known observability schema versions, sorted newest first.

## Auth

* `Authorization: Bearer <jwt>` or project-scoped `X-API-Key`.

## Response

```json theme={null}
{
  "versions": [
    {
      "version": "2026-02-23",
      "status": "active",
      "released_at": "2026-02-23T00:00:00Z",
      "compatibility_notes": "Initial canonical observability schema contract v2"
    }
  ],
  "total": 1
}
```