OpenX MCP Server
Live remote Model Context Protocol server at https://api.openx.com/mcp. Discovered by probe, not by documentation — OpenX does not mention MCP anywhere in its published docs, but the endpoint answers POST and GET with a JSON-RPC 2.0 envelope and an OAuth challenge. The tool list is auth-gated behind the same OAuth 2.0 authorization server that fronts the Platform API, advertised through RFC 9728 protected-resource metadata naming the resource "OpenX Platform API".