> ## Documentation Index > Fetch the complete documentation index at: https://knownledge.feezless.cloud/llms.txt > Use this file to discover all available pages before exploring further. # How its working ? > Explore Feezless payment solutions for API requests, payment links, product menus, POS checkout, memberships, and online invoice and bill payments. Choose the Feezless solution that fits how you sell. Browse all six solutions below, from charging for an API request to collecting payments through links, storefronts, in-person checkout, memberships, and invoices. ## How It Works Open a solution for its workflow, preparation checklist, and pricing information. Contact Feezless for account requirements and current rates. Checkout Cart and POS show illustrative fee examples, not quoted prices. > **[Protocol True Pay-Per-Request](https://knownledge.feezless.cloud/solutions/pay-per-request/index.md)** > > Charge per API request and unlock digital access when payment conditions are met. > > **Minimum preparation:** An API or digital service to charge for, a price per request or use, payment-recipient details, and terms of service. > > **Pricing:** Contact Feezless for the current transaction rate. > **[Checkout Cart](https://knownledge.feezless.cloud/solutions/checkout/index.md)** > > Share a payment link through chat, social media, or your website. > > **Minimum preparation:** A payment amount and a channel for sharing the link with customers, such as chat, social media, or a website. > > **Pricing example:** 2.0% per transaction. > **[Product](https://knownledge.feezless.cloud/solutions/product-menu/index.md)** > > Let customers browse products, add items to a cart, and pay on one page. > > **Minimum preparation:** Product or menu-item details and prices to populate your catalog. > > **Pricing:** Contact Feezless for the current transaction rate. > **[POS](https://knownledge.feezless.cloud/solutions/pos/index.md)** > > Take in-person payments from a phone or tablet and keep inventory in sync. > > **Minimum preparation:** A phone or tablet, plus the items and prices you want to sell at checkout. > > **Pricing example:** 0.8% per transaction. > **[Membership](https://knownledge.feezless.cloud/solutions/membership/index.md)** > > Turn a customer's first payment into a membership with a digital card. > > **Minimum preparation:** A membership program, digital-card details, and a channel for delivering the card and customer setup link. > > **Pricing:** Contact Feezless for the current transaction rate. > **[Invoice/Bill Payment](https://knownledge.feezless.cloud/solutions/invoice-bill-payment/index.md)** > > Send an invoice link, collect payment online, and track its status. > > **Minimum preparation:** Invoice details, an amount to collect, and a way to send the payment link to your customer. > > **Pricing:** Contact Feezless for the current transaction rate. ## True Pay-Per-Request Protocol **Use it for:** Paid API requests and access to digital services. Make individual API requests payable instead of requiring a subscription. Unlock the digital response or service when the payment conditions are met. * Charge by request or use. * Connect the request, payment, and digital delivery in one flow. * Include pricing, the payment recipient, and terms of service in the protocol. ## Payment Link **Use it for:** Collecting payments from conversations, social posts, and websites. Create a payment link and share it where your customers already are. Customers open the link to pay, and you track the payment status. * Share links in chat, on social media, or on a website. * Collect payments without building a product catalog. * See received and outstanding payments in real time. ## Product Menu **Use it for:** Product catalogs, restaurant menus, cafes, and retail storefronts. Bring your products into a single-page storefront. Customers browse the menu, add items to their cart, and complete payment without switching pages. * Display products in an online menu. * Keep browsing, cart, and checkout together. * Deduct stock automatically when a sale is completed. ## POS Cashier **Use it for:** In-person sales from a phone or tablet. Use a mobile device as your cashier interface without buying a dedicated checkout device. Record sales and update inventory as you sell. * Take orders and payments from a phone or tablet. * Support customers' payment choices at checkout. * Deduct inventory automatically with each sale. ## Membership and loyalty **Use it for:** Enrolling customers in your membership program when they pay. Issue a membership card from the customer's first payment and deliver it through their selected channel. Customers complete their own PIN setup and PDPA consent through a link. * Create membership cards as part of the payment flow. * Send the digital card to the customer. * Let customers set their PIN and provide their own consent. ## Invoice and bill payment **Use it for:** Billing customers and following up on outstanding payments. Create an invoice and send a payment link to your customer. Customers pay online while you track which invoices are paid and which remain outstanding. * Create and send bills without preparing a separate document manually. * Give customers a link to pay online. * Monitor payment status in real time. ## Choose your next step Use the solution that matches your sales flow. For setup and integration questions, contact [hello@feezless.cloud](mailto:hello@feezless.cloud) with the solution name and your use case. ## Related topics - [POS Cashier](https://knownledge.feezless.cloud/solutions/pos/index.md) - [Checkout Cart](https://knownledge.feezless.cloud/solutions/checkout/index.md) - [Invoice and bill payment](https://knownledge.feezless.cloud/solutions/invoice-bill-payment/index.md) - [Membership and loyalty](https://knownledge.feezless.cloud/solutions/membership/index.md) - [True Pay-Per-Request Protocol](https://knownledge.feezless.cloud/solutions/pay-per-request/index.md) This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.