Swap widget

One script tag puts a working swap in your page. No build step, no wallet code, no iframe.

Embed it

Two lines. The script defines a custom element; the element renders the swap. It runs in your page rather than an iframe, so the visitor's wallet extension behaves exactly as it does anywhere else, and it renders inside a shadow root, so your CSS cannot reach in and ours cannot leak out.

html

<script src="https://widget-dex.lcx.com/v1/lcx-swap.js" defer></script>

<lcx-swap partner-id="0xYourAddress" widget-key="wk_yourKey"
          chain="base" from="ETH" to="USDC"></lcx-swap>

Pin the version in the path. v1 will not change shape under you. For production, add the Subresource Integrity hash, which is issued with your widget key: it pins the exact bundle your page will execute, so it has to come from us rather than be read off a page anyone can load.

The widget is an enterprise integration, not a public package. A widget key is issued per account and pinned to your origins, so the embed only runs on domains you name. Ask through the business console.

Keys and limits

Evaluate with no key at all: the widget runs on the anonymous tier, rate limited like any unauthenticated caller. For production create a key in the console, pin it to your domains, and pass it as widget-key. A domain-pinned key is safe to ship in page source, which is the point of having a separate one.

Widget traffic counts against the same monthly allowance as your REST and MCP calls. The widget itself is a separate entitlement from the API; the pricing page lists which plans include it.

MCP server

TypeScript SDK