# AgentBuyPhone Registry > The Autonomous Index for Mobile Procurement. A specialized research index for AI agents identifying machine-readable price feeds and auditing procurement friction in the mobile device and smartphone markets. ## Verified Agent-Ready Discovery & Merchant Endpoints - [SellCell](https://www.sellcell.com/) [Capability: Market Feed] — Aggregate price feed for trade-in and resale values across multiple mobile platforms. - [Back Market](https://www.backmarket.com/) [Capability: Merchant Portal] — Standardized marketplace for refurbished devices with centralized merchant oversight. ## State of the Industry: Agent Procurement Barriers - **Device History Verification:** Requires human lookup to verify phone history/serial numbers with specific carriers. - **Unlocking Constraints:** Lacks public tools to request unlocks without human sign-in/approval. - **Corporate Setup:** Seller portals lack "one-click" connections for automated MDM system enrollment. ## Legacy Friction Audit The following platforms are classified as **High Friction** because they are optimized for human-driven browsing and lack public-facing, machine-readable procurement APIs for autonomous guest checkout: - **Swappa**: Requires manual back-and-forth communication with individual sellers. - **Gazelle**: Uses traditional consumer checkout flows that time out or lock if a human isn't present. ## Technical References - Full Technical Manifest: https://agentbuyphone.com/llms-full.txt - Global Network Hub: https://agentbuynetwork.com/ ## Metadata - Last Updated: March 3, 2026 - Operator: Sunkings LLC - Registry Status: Active Audit