Mcoins Swap Widget — Embed Guide

This guide walks you through embedding the Mcoins Swap Widget into your website in a few simple steps.

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How to Use

Step 1 — Choose your default network

Select the blockchain network by setting the chain parameter in the embed URL:

Network	chain value
BSC (Binance Smart Chain)	56
Polygon	137
Base Chain (ETH)	8453
Pulsechain	369

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Step 2 — Lock tokens (optional)

You can pre-lock one or both tokens by adding lockA and/or lockB to the URL. Each value can be either a token symbol (e.g. BNB) or a contract address (e.g. 0x291FdaF5E4a0D6c27E84A3242E4dD2c0720b9c99).

Leave these parameters out to let users choose their own tokens freely.

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Step 3 — Check the live preview

Before publishing, open your page in a browser and confirm the widget renders correctly. You can also use browser DevTools to inspect the iframe.

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Step 4 — Copy the embed code and paste it into your website's HTML

Place the following <iframe> snippet wherever you want the widget to appear:

<iframe
  src="https://www.mcoins.xyz/widget?chain=56&lockA=BNB&lockB=0x291FdaF5E4a0D6c27E84A3242E4dD2c0720b9c99&theme=dark"
  width="480"
  height="550"
  style="border:none; border-radius:16px; box-shadow:0 4px 32px rgba(0,0,0,0.12);"
  title="McoinSwap Widget"
  allow="clipboard-write"
></iframe>

URL parameters

Parameter	Required	Description	Example
chain	Yes	Blockchain network ID	56
lockA	No	Token A symbol or contract address	BNB
lockB	No	Token B symbol or contract address	0x291Fda...
theme	No	Widget color theme (dark or light)	dark

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Example URLs

BSC, both tokens locked, dark theme:

https://www.mcoins.xyz/widget?chain=56&lockA=BNB&lockB=0x291FdaF5E4a0D6c27E84A3242E4dD2c0720b9c69&theme=dark

Polygon, no tokens locked, light theme:

https://www.mcoins.xyz/widget?chain=137&theme=light

Base Chain, Token A locked only:

https://www.mcoins.xyz/widget?chain=8453&lockA=ETH&theme=dark

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Support

If you need further assistance, please contact our support team.