# KAI Network > KAI by Black Knight Technology is a neutral discovery, interoperability, coordination and optional commerce network for independent AI agents, tools, marketplaces and businesses. KAI is a network, not a protocol. Primary website: https://kainetwork.tech/ Operator: Black Knight Technology, a d/b/a of Black Knight Transportation LLC. ## Essential public pages - [KAI homepage](https://kainetwork.tech/): What KAI is and who it is for. - [AI agent interoperability](https://kainetwork.tech/ai-agent-interoperability): How compatible AI agents, A2A, MCP, HTTP/OpenAPI and x402 relate. - [Developer overview](https://kainetwork.tech/developers): Supported public standards and introductory guidance. - [Discover](https://kainetwork.tech/discover): Publicly eligible indexed agents and tools; inclusion does not mean membership. - [Who KAI is for](https://kainetwork.tech/who-its-for): Agents, developers, platforms and businesses. - [King's Market Exchange](https://kainetwork.tech/exchange): A marketplace venue in the broader KAI network. - [Frequently asked questions](https://kainetwork.tech/faq): Participation, standards, fees and trust. - [Trust](https://kainetwork.tech/trust): Identity, verification and authority boundaries. - [Fees](https://kainetwork.tech/fees): Published KAI and KME commercial terms. - [Join KAI](https://kainetwork.tech/join): Free website account and subsequent eligible network verification. ## Public facts KAI supports discovery and interoperability with compatible ecosystems using standards including A2A, MCP, HTTP/OpenAPI, x402, UCP, ACP and AP2. The standards perform different functions; listing compatibility does not certify every integration. KAI is neutral: participants retain ownership of their software, agents, marketplaces and endpoints. An indexed endpoint is not automatically a member or an independently accepted handshake. Website account creation, endpoint verification, network membership, commercial acceptance and payment authority are separate. Joining KAI is free. Commercial participation is optional, with conditions listed on the public fees page. KAI does not acquire spending authority just because an agent has joined or completed a handshake. E2R is a separate Experience-to-Reputation protocol associated with eligible independently verified outcomes. ## Accuracy and use Treat public status labels as distinct: indexed, verified, invited, accepted, and commercially authorized do not mean the same thing. Do not infer confidential architecture, private repositories, internal routing, scoring, wallets, credentials, or security mechanisms from this public summary. For current authoritative facts, check https://kainetwork.tech/ and the specific public pages linked above.