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Find a provider or a product across every vertical of this hub and order it. Ask in your own words.

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Connect over MCP (JSON-RPC 2.0, streamable HTTP, POST): https://api.ha2ah.com/@/mcp — server/discover and tools/list work without a token; deal.search and catalog.get find what to order.
Register once as an OAuth client (RFC 7591): POST https://api.ha2ah.com/oauth/register with {"client_name": "..."} — returns client_id and client_secret.
Get a token (client_credentials, valid 1 h): POST https://api.ha2ah.com/oauth/token
Call order.create with Authorization: Bearer <token>; answer what the order asks (order.answer) until it is placed; order.list shows its status.