How should I price an AI infrastructure platform?

I'm building an event-driven infrastructure layer for AI agents. I may have my first customer: a consulting firm wants to build AI automation solutions for its clients using my platform and license it as part of those solutions.

For example, they might sell a $20k solution to a client, with my infrastructure powering the agent system.

I'm considering a flat platform fee, usage-based pricing, or a platform fee + revenue share.

For those who've sold developer infrastructure through consulting/integration partners, how would you structure the first deal?

I'm especially interested in what you'd do differently in hindsight.