Ready-to-use prompts, agents and short practical guides for marketers who use AI in their marketing. Free, and tested on real client work.
Paste any prompt, agent or skill. Skill Audit tells you in plain English what it does, who it's for, and which model suits it best - with a safety verdict. No sign-up.
mayday is operated by Just Jane, the Belgian marketing business that runs marketing for start-ups and scale-ups. Nothing ships from theory alone.
Nothing is released from theory alone. Every tool and explainer is put to work on live client marketing before it's published.
Everything works with Claude, ChatGPT and Gemini — so you keep your existing tools and your own data. No lock-in.
From a first copy-paste prompt to a complete AI marketing system, without switching brands halfway.
We publish only what a marketer can put to work — and we state openly what a tool is not good at.
One short, practical explainer on AI in your marketing, whenever there's something worth sharing. Plus first access to every new free tool. Always free.
