> ## Documentation Index > Fetch the complete documentation index at: https://docs.darwin.so/llms.txt > Use this file to discover all available pages before exploring further. # Channel > Understand how Darwin Supply distributes verified projections without duplicating seller data. A channel exposes an eligible projection of a Supply business and its catalog to another commerce surface. | Channel | Protocol | Role | | -------------- | ---------- | ----------------------------------------------------------------------- | | Darwin network | Darwin API | Native discovery, requests, deals, fulfillment, and settlement. | | ChatGPT | ACP | Product discovery and agentic checkout where supported. | | Gemini | UCP | Business profile, capability negotiation, checkout, and order services. | | AI clients | MCP | OAuth-scoped catalog, order, and earnings tools. | ## Readiness is not availability `Ready` means known Darwin-side checks pass. `Awaiting approval` means an external provider decision remains. `Live` requires a verified production feed or endpoint and provider approval where applicable. Review channel requirements, current release status, and the source-of-truth rule.