infrastructure capability/a2a # Agent-to-agent protocol Speaks or implements an agent interoperability protocol. 8 active agents tagged · verified against the catalog seed. TAGGED ## 8 agents with agent-to-agent protocol [OpenScout / Scout OpenScout · agent-communication cli/api · local · Free (OSS), local](https://www.agentlist.io/systems/scout) [Instinct Community / OSS · bridge caution api · local · Free (OSS, MIT)](https://www.agentlist.io/systems/instinct) [A2A Protocol A2A Project · agent-communication api · local/cloud · Open protocol (free)](https://www.agentlist.io/systems/a2a) [AGNTCY AGNTCY · agent-communication api · local/cloud · Free (OSS, Apache-2.0)](https://www.agentlist.io/systems/agntcy) [Agent Network Protocol Community / OSS · agent-communication api · local/cloud · Open protocol (free)](https://www.agentlist.io/systems/anp) [NANDA NANDA (MIT Media Lab) · agent-communication api · local/cloud · Free (research project)](https://www.agentlist.io/systems/nanda) [BeeAI IBM · agent-communication api/cli · local/cloud · Free (OSS, Apache-2.0)](https://www.agentlist.io/systems/beeai) [Agent Payments Protocol Google · agent-services api · local/cloud · Open protocol (free)](https://www.agentlist.io/systems/ap2) RELATED ## Related capabilities - [Agent identity & auth](https://www.agentlist.io/capabilities/identity) - [Agent payments](https://www.agentlist.io/capabilities/payments) - [API-native](https://www.agentlist.io/capabilities/api-native) - [MCP tools](https://www.agentlist.io/capabilities/mcp) - [Messaging surface](https://www.agentlist.io/capabilities/messaging-infra) - [Multi-agent orchestration](https://www.agentlist.io/capabilities/multi-agent) - [Sandbox runtime](https://www.agentlist.io/capabilities/sandbox-runtime) - [Self-hostable](https://www.agentlist.io/capabilities/self-hostable) - [Tool calling](https://www.agentlist.io/capabilities/tool-calling) --- Source: [Agent-to-agent protocol — 8 AI agents | agentlist.io](https://www.agentlist.io/capabilities/a2a). This is the public page rendered as Markdown; interactive controls require the website.