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Developers

Accept crypto payments with the PHP SDK

The official CryptoPayr PHP SDK lets any PHP application accept Bitcoin, Ethereum, USDT and 110+ other cryptocurrencies. Create a payment, send the customer to the hosted checkout, and confirm the order from a signed webhook — no card data, no chargebacks, settlement to your USD wallet balance.

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How to accept crypto payments with the PHP SDK

Follow these steps to start taking Bitcoin, Ethereum, USDT and 110+ other coins.

  1. Install the SDK

    Install with Composer using composer require cryptopayr/php-sdk, or drop the folder in and require its bundled autoload.php — the library works with or without Composer.

  2. Initialise the client

    Create the client with your secret API key from Dashboard → Developers: $cp = new \CryptoPayr\Client(['api_key' => 'sk_live_…']);

  3. Create a payment

    Call $cp->payments->create([...]) with the amount, currency and your order_id as metadata. You get back a transaction id and a hosted checkout_url.

  4. Redirect to the hosted checkout

    Send the buyer to the returned checkout_url, where they pick a coin and pay. CryptoPayr handles the wallet address, network fees and confirmations.

  5. Verify the webhook

    On your webhook endpoint, validate the X-CryptoPayr-Signature header with CryptoPayr\Webhook::verify($body, $sig, $apiKey), then fulfil the order when status is COMPLETED.

Need the full reference? See the API & webhook documentation, or read about the crypto payment gateway.

Requirements & compatibility

Frequently asked questions

Do I need Composer?

No. The SDK ships with its own autoload.php you can require directly, and also works as a normal Composer package for PSR-4 projects.

How do I prevent fake webhook calls?

Every webhook is signed with HMAC-SHA256 using your API key. The SDK's Webhook::verify() helper checks the signature so only genuine CryptoPayr events are processed.

Which coins can customers pay with?

Bitcoin, Ethereum, USDT, USDC, BNB, Litecoin and 110+ more across multiple networks. The buyer chooses at the hosted checkout.

Where can I see full code examples?

The complete reference lives in the API documentation, including payments, payouts, refunds, balances and live rates.

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Start accepting crypto with the PHP SDK

Create a free CryptoPayr account, grab your API key, and connect the PHP SDK in minutes.

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