Swipefast is a checkout builder that uses artificial intelligence to generate payment flows based on a seller's verbal or typed description of their products. Users connect the service to an AI assistant such as ChatGPT, Claude, Gemini, or similar tools, describe what they sell, and the AI drafts a complete checkout page that includes order bumps, upsells, and payment plans. The seller reviews and approves the draft before it goes live, and all sales revenue is paid directly to the seller. The platform is available from twenty nine dollars per month with a seven day free trial. The service integrates with multiple AI interfaces including ChatGPT, Claude, Claude Code, Cursor, Codex, and Gemini. After a one time connection, users can instruct the AI to build a checkout, add an order bump, create discount codes, or request sales reports by source. The tool also supports automation through external workflow platforms such as Zapier, n8n, and Make, enabling data to be sent to email tools, CRMs, or spreadsheets. These automation features are available on the Pro plan. The typical workflow involves a user telling the AI what they sell using plain language, reviewing the draft checkout and upsells produced by the AI, and then publishing it on the user's own address. The service provides an MCP server, an open source CLI, a REST API, and signed webhooks for technical users who want to extend or customise the integration. Sellers can also add optional extras that buyers can select with a single tick during payment, with the extra delivered alongside the main product.