Pay button
Any website · A server that creates paymentsOne script tag: the checkout in a window over your page.
Billing & hosting
Let clients pay WHMCS invoices with skins
Upload one module and every invoice gets a Pay with skins button. Payments are recorded on the invoice automatically, in the invoice currency.
- WHMCS 8+
- PHP 7.4+
- HTTPS
Game server hosts, VPS providers and bot hosting companies bill through WHMCS, and many of their clients are players first. When a renewal is due, some of them would rather trade a few skins than find a card. The SkinsFlow gateway module gives them that option on every invoice.
The client clicks Pay with skins on the invoice, picks CS2, Dota 2 or Rust items covering the balance due and accepts one Steam trade. SkinsFlow sends a signed notice, the module checks it, reads the payment again from SkinsFlow and records it on the invoice. WHMCS then does what it always does: marks the invoice paid, unsuspends the service, sends the receipt.
Your SkinsFlow balance is in USD. The payment is recorded in the invoice currency using your WHMCS rates, and the SkinsFlow fee of 2.5% is recorded as the transaction fee, so your books match what reached your balance.
Features
What you get with WHMCS
A button on every invoice
Clients pay the open balance of any invoice, including renewals and add-ons.
Recorded for you
Payments are added to the invoice automatically with the SkinsFlow payment ID as the transaction ID.
Your invoice currencies
Payments are created in the invoice currency when SkinsFlow supports it, or converted with Convert To For Processing.
Fees on the record
The SkinsFlow fee is stored as the transaction fee, so reports show exactly what was credited.
Trade Protection logged
Protected payments appear in the gateway log as pending and are recorded when they settle.
Test mode
Pay a test invoice with your test secret before clients see the button.
What customers pay with
Real items, priced live.
Items like these are what your customers trade. Each one is valued the moment their inventory loads.
On the market right now
Live prices, refreshed every few minutes
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AK-47 | Redline Field-Tested $24.05
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AWP | Asiimov Field-Tested $99.27
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Knife
Karambit | Marble Fade Factory New $937.37
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M4A1-S | Solitude Factory New $9.54
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Gloves
Sport Gloves | Vice Field-Tested $353.46
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Desert Eagle | Printstream Field-Tested $32.78
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Knife
Butterfly Knife | Fade Factory New $1,927.73
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USP-S | Printstream Field-Tested $35.05
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M4A4 | Falak Battle-Scarred $13.74
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Glock-18 | AXIA Field-Tested $17.29
Install
Set up WHMCS
Create a project
In the SkinsFlow dashboard, add your billing site under Projects & API keys and keep the secrets safe.
Upload the module
Unzip skinsflow-whmcs.zip into your WHMCS root folder. It adds files under modules/gateways only.
Activate the gateway
In the WHMCS admin open Setup, Payments, Payment Gateways, All Payment Gateways and click SkinsFlow (pay with skins).
Paste your keys
Enter the Client ID, API secret and webhook signing secret, and set Convert To For Processing if your invoices use a currency SkinsFlow does not support.
Connect the webhook
In the SkinsFlow dashboard open your project, Settings, and set the Webhook URL to your WHMCS address followed by /modules/gateways/callback/skinsflow.php.
Test, then go live
Turn on test mode, pay a small invoice, check it is recorded, then switch test mode off.
FAQ
WHMCS and skins payments
What does the WHMCS module cost?
Nothing. The WHMCS module is free to download and use. SkinsFlow charges 2.5% of each payment credited to your balance, and nothing else: no setup fee, no monthly fee, no minimum volume. Failed, expired and returned payments cost nothing.
Can clients pay part of an invoice?
The payment is created for the open balance of the invoice. If the client sends items worth more than needed, the value shown at checkout is what is recorded.
Which currency is recorded on the invoice?
The invoice currency. When the payment currency matches, the amount is exact; otherwise it is converted with the rates in your WHMCS currency settings.
What happens with Steam Trade Protection?
Steam can hold traded items for up to 7 days and return them to the customer in that window. A protected payment is not counted as paid yet: the gateway log shows it as pending and the invoice stays unpaid. When the hold ends the payment completes on its own, or you can release it early in your SkinsFlow dashboard if you trust the customer.
What if Steam returns the items?
If you released a protected payment early and Steam later returns the items, the gateway log and activity log say so. Review the invoice and the service it paid for.
Can I test before going live?
Yes. Turn on test mode and use your project's test secret. The checkout then shows real items with real prices but no item and no money moves, and buttons let you play every outcome: paid, protected, returned, declined. Gateway log entries show whether a payment was live.
Where are the logs?
In WHMCS under Billing, Gateway Log, filtered by SkinsFlow. Secrets are never written to the log.
Related integrations
Other ways to take skins
PHP SDK
PHP 8.0+ · ext-curl and ext-jsonCreate payments and check notices from any PHP site or framework.
WooCommerce
WordPress 6.0+ · WooCommerce 7.6+Pay with skins at your WordPress checkout. Orders complete on their own.
Industries
Who uses it
Start today
Get started
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