> For the complete documentation index, see [llms.txt](https://docs.aevo.xyz/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.aevo.xyz/api-reference/websocket-api/messaging-format.md).

# Request Format

***

* `op`: Operation type, for example `subscribe`, `unsubscribe`, or `ping`
* `data` (optional): Parameters specific to an operation
* `id` (optional): The request ID, an arbitrary integer passed to link requests with responses

## Response Format

***

* `data`: The JSON payload of the response or the channel message
* `error` (optional): The error message returned if an error occurred
* `id` (optional): The ID of the corresponding request, if it is provided
* `channel` (optional): The channel for the sent message, only added to the response when there is a response on the channel


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