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

# Post Channel

> Low-latency order placement and cancellation over the WebSocket post channel.

In addition to subscriptions, the Intention WebSocket API will expose a low-latency post channel for placing, modifying, and cancelling orders without the overhead of a fresh REST request. The post channel is intended for market makers, latency-sensitive integrations, and clients that already maintain a long-lived WebSocket connection for market data.

<Note>
  Status: not yet published. The post channel protocol will be released alongside the public testnet. Until then, treat the descriptions below as planning documentation.
</Note>

## What this page will contain

When the API ships, this page will document:

* **Action types.** Place, modify, cancel, batch, and margin actions sent over the post channel, mirroring the [Exchange](/api-reference/rest/exchange) REST endpoints.
* **Signing.** How signed-action envelopes are framed inside WebSocket messages, cross-referenced with [signing](/api-reference/conventions/signing).
* **Acknowledgements.** The shape of post-channel acks, the relationship between ack arrival and block commit, and how clients should reconcile acks with subscription updates.
* **Ordering.** How the post channel interacts with [transaction sequencing](/trading/tx-sequencing) — in particular, the cancel-before-place priority within a single block.
* **Rate limits.** Post-channel-specific limits and how they compose with REST limits, cross-referenced with [rate limits](/api-reference/conventions/rate-limits).

For early integration questions, email `contact@intention.xyz`.