# HTTP: ui

Arc agent documentation

All 2 ui endpoints, with request fields and access notes.

[HTTP directory](/arc/docs/reference/http) · [Transport guide](/arc/docs/guides/http)

Request fields and access notes below are partial. Additional constraints and permissions may apply. Prefer the corresponding MCP tool and schema where available.

## GET /v1/ui/commands

Read ui commands poll.

Query field names (types and requiredness not specified here): `after_seq`, `timeout`.

## POST /v1/ui/commands

Ui command post.

Access: LAN writes require an active session token. Local loopback requests are exempt from this requirement by default; other permissions still apply.

### Request body fields (partial)

| Field | Type | Required | Constraints |
| --- | --- | --- | --- |
| `verb` | string | yes | See operation notes. |
| `room_id` | string | no | See operation notes. |
| `artifact_id` | string | no | See operation notes. |
| `message_id` | integer | no | See operation notes. |
| `tab` | string | no | See operation notes. |
| `open` | boolean | no | See operation notes. |
| `url` | string | no | See operation notes. |
| `path` | string | no | See operation notes. |
| `label` | string | no | See operation notes. |
| `by_agent_id` | string | no | See operation notes. |

Other constraints may apply, including for fields marked optional.