> ## Documentation Index
> Fetch the complete documentation index at: https://hub.hcompany.ai/llms.txt
> Use this file to discover all available pages before exploring further.

> ## Agent Instructions
> H Platform has four products: the Agents API (managed computer-use agents, base URL https://agp.eu.hcompany.ai/api/v2 or https://agp.hcompany.ai/api/v2 for the US), the Models API (OpenAI-compatible Holo vision-language models at https://api.hcompany.ai/v1), HoloDesktop CLI (Holo on the user's own desktop), and HoloTab (a free no-code Chrome extension that runs Holo in the user's browser, with recordable routines and schedules).
> Authenticate with a bearer API key from the HAI_API_KEY environment variable. SDKs: `pip install hai-agents` (Python, `from hai_agents import Client`) and `npm install hai-agents` (TypeScript, `import { HaiAgentsClient } from "hai-agents"`). CLI: `hai`.
> Agents do work in a browser or on a desktop; describe the task as an imperative instruction. To run a task quickly, prefer the pre-built agent `h/web-surfer-flash`. Read results from the session's `latest_answer` after it reaches a terminal status.
> Sessions are the unit of work; wait for a terminal status (completed, failed, timed_out, interrupted) before reading the answer. Use webhooks or the `changes` long-poll endpoint to follow progress.

# List event types

> List the webhook event types you can subscribe to, with the payload each one carries.

Lists every concrete event type that can appear in a webhook's `enabled_events`, with a human-readable description. Use it to populate subscription UIs or to discover types added after you integrated.

**Returns** an array of event type definitions.

***

## The event type definition object

<ResponseField name="type" type="string">
  The event type identifier, e.g. `session.completed`.
</ResponseField>

<ResponseField name="description" type="string">
  When the event is sent.
</ResponseField>

***

## Examples

<CodeGroup>
  ```bash cURL theme={"system"}
  curl https://agp.eu.hcompany.ai/api/v2/webhooks/events \
    -H "Authorization: Bearer $HAI_API_KEY"
  ```

  ```python Python theme={"system"}
  from hai_agents import Client

  client = Client()

  for event in client.webhooks.list_webhook_events():
      print(event.type, "-", event.description)
  ```

  ```typescript TypeScript theme={"system"}
  import { HaiAgentsClient } from "hai-agents";

  const client = new HaiAgentsClient();

  const events = await client.webhooks.listWebhookEvents();
  for (const event of events) {
    console.log(event.type, "-", event.description);
  }
  ```
</CodeGroup>

```json Response theme={"system"}
[
  {
    "type": "session.awaiting_tool_results",
    "description": "Sent when the agent is waiting for client-side tool results."
  },
  {
    "type": "session.completed",
    "description": "Sent when a session finishes successfully."
  },
  {
    "type": "session.failed",
    "description": "Sent when a session fails."
  },
  {
    "type": "session.idle",
    "description": "Sent when the agent finishes a run and waits for the next message."
  },
  {
    "type": "session.status_updated",
    "description": "Sent on every session status change, including running, completed, failed, timed out, interrupted, paused, idle, or awaiting tool results."
  },
  {
    "type": "session.timed_out",
    "description": "Sent when a session exceeds its time limit."
  }
]
```