Terza Inference is a model API marketplace on Bittensor subnet 103. Buyers use one API key with OpenAI- and Anthropic-compatible interfaces to access models offered by independent miners. The gateway routes requests to eligible offers, signs requests sent to miners, checks usage receipts against delivered output, and settles charges from verified usage. The API covers text, retrieval and media workflows, including asynchronous media tasks. Users can also participate as miners or validators; miners serve models through their own upstreams, while validators probe offers and submit weights on chain.