> ## Documentation Index
> Fetch the complete documentation index at: https://praison.ai/docs/llms.txt
> Use this file to discover all available pages before exploring further.
# A2A Protocol
> Agent-to-Agent communication protocol
A2A (Agent-to-Agent) enables standardized communication between agents.
```mermaid theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
graph LR
subgraph "A2A Protocol"
A1[🤖 Agent 1] <--> P[📡 A2A]
P <--> A2[🤖 Agent 2]
end
classDef agent fill:#6366F1,stroke:#7C90A0,color:#fff
classDef protocol fill:#F59E0B,stroke:#7C90A0,color:#fff
class A1,A2 agent
class P protocol
```
## Quick Start
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
use praisonai::{Agent, A2A, A2AAgentCard};
// First create your agent
let agent = Agent::new()
.name("Support Agent")
.instructions("Help users with support questions")
.build()?;
// Create A2A card for discovery
let card = A2AAgentCard::new()
.name("Support Agent")
.description("Handles customer support")
.url("http://localhost:8080");
// Start A2A server
let a2a = A2A::new()
.card(card)
.build()?;
```
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
use praisonai::A2A;
// Connect to another agent
let remote = A2A::connect("http://agent-b:8080").await?;
// Send a task
let task = remote.create_task("Summarize this document").await?;
let result = remote.get_task_result(&task.id).await?;
```
***
## A2A Components
| Component | Description |
| -------------- | ---------------------------------------- |
| `A2AAgentCard` | Agent's public identity and capabilities |
| `A2ATask` | Work unit sent between agents |
| `A2A` | Protocol handler for communication |
***
## Related
Agent delegation
Multi-agent