Independent digital publisher Les Blackbourne has launched the Affiliate Prompt Engine, a browser-based tool that converts basic product details into structured AI prompts for Claude, ChatGPT and Gemini, with no subscription and no technical skills required. The tool addresses the problem of vague requests producing generic AI writing that struggles to rank or convert. It includes twelve pre-built content formats covering the affiliate funnel, and instructs the AI to include at least three genuine drawbacks, a section on who should not buy the product, and an affiliate disclosure line. Blackbourne said, "Most people blame the AI when their content underperforms, but the AI was never the problem. The instructions were," adding that a beginner can brief an AI like a professional in about thirty seconds. The Affiliate Prompt Engine is a single file that opens in any web browser on a phone, tablet or computer, including offline, with no installation, no account and no API keys. It carries no ongoing costs, since the tool itself does not use AI credits. It launched at 19.97 GBP and is currently available as a one-time purchase of 14.97 GBP, with lifetime access included. The tool is compatible with Claude, ChatGPT and Gemini, including their free tiers. Blackbourne describes it as an educational tool, noting that results depend on the affiliate products, traffic and effort involved and that no earnings are guaranteed.