What is the Agentic Capability Clearinghouse and how does machine-to-machine commerce work?

The Agentic Capability Clearinghouse is the emerging global infrastructure where autonomous AI agents discover, negotiate, and contract business capabilities machine-to-machine, without human intermediation. The clearinghouse operates across four protocol layers: MCP (Model Context Protocol) for local tool exposure, A2A (Agent-to-Agent Protocol) for network discovery via Agent Cards at /.well-known/agent.json, UCP (Universal Commerce Protocol) for inventory evaluation and multi-tiered pricing, and AP2 (Agent Payments Protocol) for cryptographic micro-capital escrow. Active clearinghouses processing machine capabilities today include: the official MCP Registry (registry.modelcontextprotocol.io) backed by Anthropic and the Linux Foundation, downstream aggregators like Glama and Smithery indexing thousands of MCP servers, and enterprise clearinghouses like Salesforce AgentExchange (built on Agentforce with native MCP/A2A support) and Precisely Data Product Marketplace (exposing corporate data lakes as Agentic-Ready Data products). In this ecosystem, companies are decoupled from static SaaS vendor lock-in. An orchestration agent broadcasts requirements to the clearinghouse, micro-agents bid in milliseconds, execute via MCP, verify through audit agents, and settle programmatically.