The Full Order Book API returns the current full order book for a specified bond.

If the specified bond exists in our universe, you will receive a
response with all bids and asks in the order book. Moment
will provide data on yields to maturity and yields to worst as
available, however, Moment can not guarantee that these yields will be
available for all bonds. If yields are not available, the response will
contain null values for yield-related fields.

If the specified bond does not exist in our universe or is inactive, you
will receive a not_found error. If the bond is not tradeable, you will
receive a bad_request error.