heura is an AI inference marketplace on Robinhood Chain. Developers can use an OpenAI-compatible API with a prepaid key, while agents can pay for individual requests in USDG; sellers can offer compatible inference capacity. The router selects a healthy seller with the deepest discount for a model and can fail over when a seller fails. Wallet sign-in, API keys with spend caps, USDG top-ups, and request-level x402 payments are documented. The product is in beta, and its documentation says it has not been independently audited.