Transport — Agent wire protocols # AGNTCY / SLIM Wire formats between agents, hosts, and tool servers. Cisco-originated 'Internet of Agents' stack — agent directory plus the SLIM secure messaging fabric and identity badges. [agntcy.org ↗](https://agntcy.org/) Catalog entry: [AGNTCY](https://www.agentlist.io/systems/agntcy) MIX ## Who speaks it - 01[agent communication platforms](https://www.agentlist.io/categories/agent-communication) BY ## Vendors (1) - [AGNTCY](https://www.agentlist.io/ai/agntcy) MATRIX ## Agents on this wire (1) [AGNTCY AGNTCY · agent-communication api · local/cloud · Free (OSS, Apache-2.0)](https://www.agentlist.io/systems/agntcy) TABLE ## Transport table | Agent | Vendor | Category | | --- | --- | --- | | AGNTCYAGNTCY is the Cisco-originated 'Internet of Agents' collective — an open-source stack for agent discovery (directory), secure messaging (SLIM), identity, and observability across vendors. | AGNTCY | agent-communication | KIND ## More agent wire protocols - [A2A (Agent2Agent)](https://www.agentlist.io/transports/a2a) - [ACP](https://www.agentlist.io/transports/acp) - [AG-UI](https://www.agentlist.io/transports/ag-ui) - [AITP](https://www.agentlist.io/transports/aitp) - [ANP (Agent Network Protocol)](https://www.agentlist.io/transports/anp) - [MCP (Model Context Protocol)](https://www.agentlist.io/transports/mcp) --- Source: [AGNTCY / SLIM — agent transport | agentlist.io](https://www.agentlist.io/transports/agntcy-slim). This is the public page rendered as Markdown; interactive controls require the website.