You already have a working product. That's more than most people ever get to. Stop asking for advice and go sell it. Email 10 companies today. You'll learn more from 10 rejections than from any book or forum thread. The best GTM strategy for a solo founder is volume and speed, not optimization.
The decision makes sense, but the developer experience around it is terrible. I assumed OAuth would work for third-party integrations — turns out you need a separate API key with separate billing, and there was zero documentation pointing you in that direction before the cutoff. Anthropic ships fast and the product is great, but they could really learn from Stripe: when your users are engineers, clear docs aren't a nice-to-have — they're your entire sales funnel.