# Guides

- [Introduction](/guides/introduction.md)
- [Environments](/guides/envs.md)
- [Creating a Test Account](/guides/creating-a-test-account.md)
- [API Credentials](/guides/api-credentials.md)
- [API Basics](/guides/api-basics.md)
- [Responses](/guides/api-basics/responses.md)
- [Date formats](/guides/api-basics/date-formats.md)
- [Authentication](/guides/api-basics/authentication.md)
- [How it works](/guides/api-basics/authentication/how-it-works.md)
- [Signature](/guides/api-basics/authentication/signature.md)
- [Creating a signature. Code samples](/guides/api-basics/authentication/code-samples.md)
- [Callbacks](/guides/api-basics/callbacks.md)
- [API Client Libraries](/guides/api-client-libraries.md)
- [API Reference](/guides/api-reference.md)
- [Cryptocurrency Payments](/guides/cryptocurrency-payments.md)
- [Currencies](/guides/currencies.md)
- [Supported Currencies](/guides/currencies/currencies.md)
- [Currency Icons](/guides/currencies/icons.md)
- [Confirmations](/guides/confirmations.md)
- [Tools for accepting payments](/guides/tools-for-accepting-payments.md)
- [Prebuilt integrations](/guides/prebuilt-integrations.md)
- [E-commerce payment plugins](/guides/prebuilt-integrations/e-commerce-payment-plugins.md)
- [Payment and software providers](/guides/prebuilt-integrations/payment-and-software-providers.md)
- [Channels](/guides/channels.md)
- [Channel payment](/guides/channels/channel-payment.md)
- [Payment statuses](/guides/channels/payment-statuses.md)
- [Channel payment sequence](/guides/channels/payment-sequence.md)
- [Create a Channel](/guides/channels/create-a-channel.md)
- [Visual representation at Cashier](/guides/channels/visual-representation-at-cashier.md)
- [Channel hosted page](/guides/channels/channel-hosted-page.md)
- [Channel payment callbacks](/guides/channels/callbacks.md)
- [Automatic channel payment enrollment](/guides/channels/automatic-channel-payment-enrollment.md)
- [Invoices](/guides/invoices.md)
- [Invoice statuses](/guides/invoices/invoice-statuses.md)
- [Invoice payment sequence](/guides/invoices/payment-sequence.md)
- [How to handle unresolved invoices](/guides/invoices/how-to-handle-unresolved-invoices.md)
- [Underpaid](/guides/invoices/how-to-handle-unresolved-invoices/underpaid.md)
- [Overpaid](/guides/invoices/how-to-handle-unresolved-invoices/overpaid.md)
- [Paid late](/guides/invoices/how-to-handle-unresolved-invoices/paid-late.md)
- [Illicit resource](/guides/invoices/how-to-handle-unresolved-invoices/illicit-resource.md)
- [Invoice refunds sequence](/guides/invoices/how-to-handle-unresolved-invoices/invoice-refunds.md)
- [Create an invoice](/guides/invoices/create-an-invoice.md)
- [Visual presentation at Cashier](/guides/invoices/visual-presentation-at-cashier.md)
- [Invoice hosted page](/guides/invoices/invoice-hosted-page.md)
- [Online checkout](/guides/invoices/payment-widget.md)
- [How-to](/guides/invoices/payment-widget/how-to.md)
- [Payment links](/guides/invoices/payment-links.md)
- [Invoice callbacks](/guides/invoices/callbacks.md)
- [Payouts](/guides/payouts.md)
- [Payout statuses](/guides/payouts/payout-statuses.md)
- [Payout sequence](/guides/payouts/payment-sequence.md)
- [Payout fees consideration](/guides/payouts/payout-fees-consideration.md)
- [Network fees](/guides/payouts/payout-fees-consideration/miner-fees.md)
- [Create a Coin Withdrawal](/guides/payouts/create-a-coin-withdrawal.md)
- [Possible errors](/guides/payouts/create-a-coin-withdrawal/possible-errors.md)
- [Withdrawals from fiat accounts](/guides/payouts/create-a-coin-withdrawal/withdrawals-from-fiat-accounts.md)
- [Withdrawals from cryptocurrency accounts](/guides/payouts/create-a-coin-withdrawal/withdrawals-from-cryptocurrency-accounts.md)
- [high\_risk\_address error message](/guides/payouts/create-a-coin-withdrawal/high_risk_address-error-message.md)
- [Visual representation at Cashier](/guides/payouts/visual-representation-at-cashier.md)
- [Minimum transaction amount](/guides/payouts/minimum-transaction-amount.md)
- [Coin Withdrawal callbacks](/guides/payouts/callbacks.md)
- [Travel Rule Compliance](/guides/payouts/travel-rule-compliance.md): API parameters used for Travel Rule compliance
- [Email Billing](/guides/email-billing.md)
- [Create an email billing](/guides/email-billing/create-an-email-billing.md)
- [Email billing callbacks](/guides/email-billing/email-billing-callbacks.md)
- [Testing](/guides/testing.md)
- [Channels](/guides/testing/channels.md)
- [Invoices](/guides/testing/invoices.md)
- [Payouts](/guides/testing/payouts.md)
- [Risks](/guides/risks.md)
- [Customers](/guides/customers.md)
- [Transactions types and Statuses](/guides/transactions.md)