---
search:
  tags:
    - Market Data
    - RECEIVE
seo:
  description: >-
    The returned snapshots are the successful response; no intermediate
    acknowledgement is… Reference for the receive operation on /ws in the
    WebSocket API API.
sidebar:
  badge: RECEIVE
  label: Request Order Book Snapshots
title: Request Order Book Snapshots
type: openapi-operation
---
The returned snapshots are the successful response; no intermediate acknowledgement is sent. UDX returns exactly one snapshot per requested sid in request order. Every returned snapshot echoes the command ID and consumes that subscription's next sequence number. After a sequence gap, stop applying that sid until this snapshot replaces its complete local state; later messages then continue from the snapshot sequence.

<Operation source="websocket-api" id="receivesnapshotcommand" />