Swap as a Service

Embed a no-KYC crypto swap widget on any website in 30 seconds. Your users swap BTC, ETH, USDT, USDC โ€” you earn from every trade. No custody. No compliance. No code required.

Why 404.cash

Everything you need to add crypto swaps to your platform

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Zero KYC

No identity verification. No documents. No data retention. Built for privacy-first platforms.

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30 Second Setup

Copy one HTML snippet. Paste it. Done. Widget auto-initializes with your config from the merchant portal.

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Earn Per Swap

Set your own margin or earn referral commissions. Two revenue models, your choice.

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Multi-Provider

Aggregates rates from 10+ non-KYC exchanges. Best rate wins. Redundancy built in.

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Ghost Mode

Optional privacy routing through XMR. Untraceable swaps for users who need maximum privacy.

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Fully Customizable

Dark/light themes. Custom accent colors. Domain restrictions. Provider filters. All from the portal.

How It Works

From zero to earning in under 5 minutes

Register

Create an anonymous account. No email required. Get your API key instantly.

Configure

Create a widget. Set your margin, choose allowed pairs, pick a theme.

Embed

Copy the HTML snippet. Paste into your site. The widget loads automatically.

Earn

Track swaps, volume, and earnings in your merchant dashboard. Withdraw anytime.

Embed in Seconds

Two lines of HTML. That's it.

<!-- 404.cash Swap Widget --> <div data-swap-widget data-widget-key="wk_your_key_here" data-theme="dark"></div> <script src="https://404.cash/widget.iife.js"></script>

Or use the JS API for full control:

SwapWidget.init({ container: '#my-swap', widgetKey: 'wk_your_key_here', theme: 'dark', allowGhost: true, });

Two Ways to Earn

Choose the model that works for your business

Referral Mode

Works with all exchange providers. Earn commission on every swap through your widget. Zero configuration โ€” just embed and earn. Commission paid in XMR.

Custom Margin

Set your own markup percentage (0-50%). You control the rate. Higher earning potential. Works with supported providers. Perfect for high-volume platforms.

Ready to Start?

Free tier includes 10 swaps. No credit card. No KYC. Obviously.

Create Merchant Account