Transport — Agent wire protocols
A2A (Agent2Agent)
Wire formats between agents, hosts, and tool servers. Cross-vendor agent wire: Agent Cards for discovery, task lifecycle and streaming updates. Google-originated, now Linux Foundation. a2a-protocol.org ↗
Catalog entry: A2A Protocol
Who speaks it
Vendors (5)
Agents on this wire (5)
OpenScout / Scout
OpenScout · agent-communication
Instinct
Community / OSS · bridge
A2A Protocol
A2A Project · agent-communication
BeeAI
IBM · agent-communication
Extended matrix — 1 more
80/20 preview
Transport table
| Agent | Vendor | Category |
|---|---|---|
| OpenScout / Scout OpenScout / Scout is a local-first broker that lets addressable agents (Claude Code, Codex, Cursor) send and ask across harnesses on one mesh. | OpenScout | agent-communication |
| Instinct Instinct is a self-learning memory MCP server for coding agents — it observes repeated patterns, scores them by confidence, and promotes mature ones into suggestions it exports back to Claude Code, Cursor, Windsurf, Codex, and CLAUDE.md. | Community / OSS | bridge |
| A2A Protocol A2A (Agent2Agent) is the open protocol for cross-vendor agent communication — Google-originated, now governed at the Linux Foundation — standardizing Agent Cards for capability discovery plus task-based messaging between agents. | A2A Project | agent-communication |
| BeeAI BeeAI is IBM's open-source agent platform — run, compose, and observe agents locally or on a cluster, with ACP/A2A-style interop and a web UI for non-technical operators. | IBM | agent-communication |