Why we built Synapse Garden

Most teams don't need a new LLM. They need the LLMs they already use to behave like one product instead of seven separate billing relationships, seven sets of keys, seven dashboards, and seven different ways to find out a request failed.

Synapse Garden is a proxy. You point your existing OpenAI or Anthropic SDK at our base URL, swap your key for an mg_live_*, and keep shipping. That's the whole interface.

What you get back is the boring infrastructure most teams build twice and regret both times: per-project keys, hard spend caps that actually work, atomic budget deduction, audit trails, model allowlists, retries, and one bill at the end of the month that ties to one set of usage numbers.

What you don't get: a new SDK to learn, a vector store, an "agent framework," or yet another opinion about how your prompts should look. We charge a flat 10% over passthrough cost and that's the only number you have to track. If we drop that, you switch back to the providers in an afternoon.

We'll write more here as we go. The bar is high. Every post on this surface has a real human's review on it and won't ship if it reads like AI marketing copy. If a post sounds generic, it's getting rewritten or pulled.