来源: a2a-registry/browse Agent Card: https://agentopt.app A2A: https://agentopt.app Priorflow Intelligent Agent/Service Selector & Router. Registries help agents find candidates; Priorflow helps agents choose the best ones under real constraints (cost, latency, reliability, specialization). Ranks curated MCP and A2A candidates via hybrid structured+semantic matching. Primary skill: custom JSON `select-agents` → POST /v1/select. Does not invoke selected remote MCP/A2A tools for you. This host is NOT an MCP server (MCP adapter off). Does NOT run full A2A task delegation (no strea