Pay-per-call OpenAI-compatible chat completions backed by Gemini 2.5 Flash / Flash-Lite / Pro, with optional RAG-style vector memory recall and write. No account needed — pay USDC over x402 per request. Buyer wallet from the signed payment is the memory namespace, so calls from the same wallet share context. Billed per input + output token. The 402 challenge authorizes an upper bound; settlement drops to actual usage.

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