> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.0x.org/changelog/2026/1/31/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.0x.org/_mcp/server.

#### 📣 Announcements

* **Cross-Chain API (Early Access):** [Learn more about the Cross-Chain API](https://0x.org/products/cross-chain) and request early access via the [signup form](https://0x.org/products/cross-chain-early-access).
* **xStock Support:** xStock assets are now supported. To enable xStocks, email `william@0xproject.com` with the subject line **“xStocks Opt-in”**, and we’ll follow up with next steps.

#### New Chains

* **Abstract:** Now supported in Swap API.

#### New Liquidity Sources

* **Avalanche:** Added Pharaoh v3.
* **Base:** Added Clober, Handji, Hydrex, Omni v3.
* **BSC:** Added Pancake Infinity Bin.

#### New Features

* **xStock Support:** Added support for xStock assets. Opt-in details are listed in the announcements above.

#### Chores

* Expanded Uniswap v4 support:
  * Added Zora hook.
  * Added third-party Creator Coin hook.
  * Added Universal hook.
  * Added Stock hook.
* **Bebop Action Migration:** Adopted the new Bebop action, improving execution handling by determining fill data internally.

> Developer documentation for the 0x API. Embed swaps in your onchain app. Access 10+ million tokens with liquidity from 150+ exchanges with a single API.