I Am Being Brought On As A Cto For A Startup With 8% Equity To Deliver In Less Than 3 Months, Is This Fair? I Will Not Promote.

To keep it short.

Person A has the idea for a startup to disrupt the housing market in the European continent. They have the connections and they got information on how things are being played out. It's not clear how credible this information is and he is not disclosing the source beyond naming general parties connected to the government, but for now his information seems to align with the sector and the idea has actual potential.

Person A has contact with a long term business partner of mine, Person B. Person B is brought on with his business skills and worldwide connections and useful knowledge of the overarching sector, of the housing market. He is not a senior, but he has connections.

Person B brings me on the project to solve it technically, and I am now negotiating the equity, I am given 8%, the rest is shared across A and B with A holding majority of course. I have just graduated, Ive interned and done contract work in multiple big corporations, and have freelance project done.

I am not required to finance anything, I am not given a salary, I simply need to make the platform as detailed, with the promise of payout in the future through my equity. Nothing has been built yet, there is ideas and expected functionality.

The current split: - Person A 51% (minimum) - Me 8% - Person B 41% (the residual 49% is split amongst us, if mine increases then the Person B shares decreases, he is mine with this)

I know I might be missing details for a proper reply of you all, but just ask in the comments and I will expand when possible.

Question: what is my position in this and do I have the leeway to ask for more. I am realistic in the sense that I am not a senior that can throw his weight around, but from the load of work and short timeframe, when I pull it off it will pay off big time. I am simply looking to get a fair share once I enable the company to make that revenue.

Addition: If anyone has tips on negotiating in my position, I am happy to learn and grow.