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What is Settlx?

Settlx handles the entire crypto payment flow for your business — from presenting the customer a payment page, to detecting their on-chain transaction, to converting and transferring the funds directly to your wallet. You create an invoice from your backend. Your customer pays through a hosted checkout page. You receive a webhook when the funds land in your wallet.

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How it works

1

Create an invoice

Your backend calls POST /api/v1/invoices with the amount and currency. The API returns a paymentUrl — a unique, hosted checkout link for that payment.
2

Customer pays

You redirect the customer to the paymentUrl. They select their preferred chain and token, see a deposit address and QR code, and send the payment.
3

Settlx settles to your wallet

Once the payment is confirmed on-chain, Settlx automatically converts it to your settlement currency (e.g. USDT) and transfers it to your configured wallet. You receive an invoice.settled webhook when it lands.

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Supported chains

ChainTypeStatus
EthereumEVMLive
PolygonEVMLive
BSCEVMLive
ArbitrumEVMLive
BaseEVMLive
OptimismEVMLive
TronTronLive

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Base URL

https://api.settlx.io
All requests must use HTTPS.

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Next steps

Authentication

Get your API key and learn how to authenticate requests.

Quickstart

Create your first invoice and receive a payment in minutes.