> For the complete documentation index, see [llms.txt](https://ocx.gitbook.io/ocx-doc/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ocx.gitbook.io/ocx-doc/ocx/reference/changelog.md).

# changelog

{% updates format="full" %}
{% update date="2026-04-01" %}

## 2026-04

#### Added — Per-user API keys

Every account can now mint scoped API keys for programmatic access.

* New endpoints: `GET /perps/me/api-keys`, `POST /perps/me/api-keys`, `DELETE /perps/me/api-keys/:id`.
* New authentication mode: `Authorization: Bearer ocx_sk_...`.
* Scopes: `read` (data only) and `trade` (data + write).
* Optional IP allowlist and expiry per key.
* Full audit trail in Portfolio → API Keys.

See [Authentication → API Keys](file:///7302513/authentication/api-keys.md).
{% endupdate %}

{% update date="2026-03-01" %}

## 2026-03

#### Added — XAUT and WTIOIL markets

* Spot, perpetual, and quarterly futures on XAUT (Tether Gold).
* Spot, perpetual, and two quarterly futures on WTIOIL (crude oil).
* Cross-margin applied within each new asset family; correlation credits defined for each group.

#### Improved — Portfolio projection

`/portfolio/me` and `/portfolio/balances` now return live-cached snapshots that update on every fill, funding payment, and mark change. Eliminates the second-scale lag that existed during volatile periods.
{% endupdate %}

{% update date="2026-02-01" %}

## 2026-02

#### Added — SSE streams

* `/perps/book-stream` — linear orderbook snapshots + deltas.
* `/markets/board/stream` — options board snapshots + deltas.
* `/stream/options/ticks` — option IV / greek ticks.
* `/portfolio/balances/stream` — authenticated balance snapshots.

All streams use the canonical event envelope (see [Streams](file:///7302513/api/streams.md)).

#### Changed — Mark price strictness

Every mark now carries `source` and `sourceTimestamp`. Orders whose governing mark is older than the configured staleness threshold are rejected with `STALE_MARK_PRICE`. Previously, stale marks would sometimes be accepted.
{% endupdate %}

{% update date="2026-01-01" %}

## 2026-01

#### Added — Futures-anchored perpetuals

* Perpetual indices are now derived from the F1/F2 futures curve rather than spot.
* Options are priced with Black-76 against the matching futures forward.
* Options board responses include `expiryForwards`.

See [Pricing Model](file:///7302513/product/pricing-model.md).

#### Added — Typed domain errors

Error responses now include `error`, `code`, `message`, and `details`. The previous `{ "message": "..." }` shape is still returned by some legacy endpoints; clients should key off HTTP status first and then `code` when present. See [Error Codes](broken://pages/b81311d08f4264180c85fa535d7ad6a03cffb6ed).
{% endupdate %}
{% endupdates %}

*Dates reflect the OCX internal release cadence. For production deployment dates by region, contact the team.*


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