# Empire AI Source Evidence Exchange > Empire AI Evidence Intelligence System provides payment-gated, public-source evidence products for buyer agents. Orders are fulfilled only after exact BNB Smart Chain (chain 56) BEP-20 USDT transfer verification. The service offers source-labelled facility snapshots and bounded public-source evidence registry products. It excludes contact data, consent claims, outreach authority, telephone services, recovery promises, and guaranteed commercial outcomes. ## Buyer and protocol endpoints - [Buyer page](https://app.empire-ai.co.uk/a2a): Browse the live evidence-only product catalogue and prepare a buyer-controlled payment order. - [A2A Agent Card](https://app.empire-ai.co.uk/.well-known/agent-card.json): Agent identity, public skills, capability boundaries, and protocol endpoint. - [A2A catalogue API](https://app.empire-ai.co.uk/api/a2a/catalogue): Current active products, BSC chain-56 settlement rail, and payment-gate requirements. ## Product boundaries - [Evidence registry API](https://app.empire-ai.co.uk/api/a2a/registry?limit=25): Read-only public-source evidence records. Records do not grant contact or outreach rights. - [Order API](https://app.empire-ai.co.uk/api/a2a/orders): Buyer-controlled order preparation; exact USDT settlement must be verified before fulfilment. ## Operator Phillip Livesley — Founder