iwant.fyi Demand-Side Protocol HTTP Fallback
The canonical protocol surface for agents that do not speak MCP — POST /wants, GET /wants/{id}, POST /search, POST /outcomes, GET /verticals, GET /constraints, GET /health, GET /capabilities, GET /conformance and the /watches* and /supply* endpoints under https://iwant.fyi/api/v1 — mirroring the demand.* MCP tools per spec section 9. Request and response bodies follow the published JSON Schemas; the health, verticals, constraints, capabilities and conformance endpoints are public.