Exposing an agent over A2A lets other agents delegate work to it. SDKs for several languages handle the protocol details.
1. Define Skills
Decide what your agent will do for others. Write clear skill descriptions, with examples and input and output formats.
2. Create the Agent Card
Include the name, description, endpoint, capabilities (streaming, push notifications), authentication schemes and skills.
3. Implement Task Handling
Connect incoming messages to your agent's logic — built with any framework — and map its progress to task states:
- Accept the task.
- Emit status updates while working.
- Ask for input when needed.
- Return artifacts on completion, or fail with an explanation.
4. Add Authentication
Validate credentials on every request and apply authorisation rules.
5. Test
- Use sample clients or inspection tools to send tasks.
- Test multi-turn flows, cancellation and failures.
- Test with a real client agent to see whether it delegates correctly from your card.
6. Deploy
Host it like any web service, with monitoring, rate limiting and logging.