# Call the agent

Before calling an agent, obtain its Agent Card; then you can use the A2A or MCP protocol to initiate the call.

```{toctree}
:hidden:
:maxdepth: 1

Get the agent call instructions <get-agent-card>
Called by other agents <call-agent-from-agent>
Call from MCP client <call-agent-from-mcp-client>
```