# PeptiPort > Fulfillment and payment processing for research-peptide brands. These are > the integration guides for the payment gateway: a hosted checkout page, or > a headless API you build your own payment screen on. Every request carries an `API-Key` header. The key is issued per brand and is visible on the brand's Payments tab in the PeptiPort dashboard. It is also the HMAC secret webhooks are signed with, so it is server-side only. API base URL: https://pay.peptiport.com ## Guides - [Hosted checkout](https://docs.peptiport.com/payments.md): create a payment, send the customer to the URL we return, verify one signed webhook. Includes card payments, which are hosted-page only. - [Headless checkout](https://docs.peptiport.com/payments/headless.md): the same payments with your own payment screen — deposit options, address assignment, live prices, and rendering guidance. Crypto only. ## Optional - [Human-readable hosted guide](https://docs.peptiport.com/payments) - [Human-readable headless guide](https://docs.peptiport.com/payments/headless) - Support: support@peptiport.com