WebSockets

WebSockets provides another way to communicate with Mews, for special use cases where polling using API Operations is too resource consuming, and event-driven Webhooks are not sufficiently real-time. A WebSocket is an open connection over which Mews can send event messages as the events occur. After you make a successful WebSocket connection to Mews, you will receive event messages according to the configuration of your integration in Mews Operations. For a comparative overview of Operations vs Webhooks vs WebSockets, see Ways to communicate.

Supported events

Entity	Event	Description
Command	DeviceCommand	Event triggered when a device command is updated
Reservation	Reservation	Event triggered when a reservation is updated
Resource	Resource	Event triggered when a resource is updated
Price	PriceUpdate	Event triggered when a rate price is updated

Endpoint URL

[WebSocketAddress]/ws/connector

• WebSocketAddress - Base address for Mews WebSockets, depending on the Environment (Demo or Production).

Authentication

Authentication is done using the same combination of ClientToken and AccessToken as used for standard API operations. These tokens must be sent as cookies together with the connection request. Most WebSocket client libraries support this. For more information about client tokens and access tokens, see Authentication.

Cookie: ClientToken=E0D439EE522F44368DC78E1BFB03710C-D24FB11DBE31D4621C4817E028D9E1D; AccessToken=C66EF7B239D24632943D115EDE9CB810-EA00F8FD8294692C940F6B5A8F9453D

Note: There can't be any spaces around = in the Cookie value as this would prevent successful WebSocket connection.

• ClientToken - Unique token per integration which will be provided to you by Mews upon successful certification.

• AccessToken - Unique token per enterprise. Can be provided to you by the enterprise admin.

Message body

{
    "Events": [
        {
            "Type": "DeviceCommand",
            "Id": "2391a3df-1c61-4131-b6f8-c85b4234adcb",
            "State": "Pending"
        },
        {
            "Type": "Reservation",
            "Id": "bfee2c44-1f84-4326-a862-5289598f6e2d",
            "State": "Processed",
            "StartUtc": "2016-02-20T13:00:00Z",
            "EndUtc": "2016-02-22T11:00:00Z"
        },
        {
            "Type": "Resource",
            "Id": "5ee074b1-6c86-48e8-915f-c7aa4702086f",
            "State": "Dirty"
        },
        {
            "Type": "PriceUpdate",
            "Id": "bd75f159-f22a-4685-abdb-aac0008e2af3",
            "StartUtc": "2019-09-07T22:00:00Z",
            "EndUtc": "2019-09-07T22:00:00Z",
            "RateId": "9c6c0556-42bb-409a-86ca-6ca430773b99",
            "ResourceCategoryId": null
        }
    ]
}

Property	Type	Contract	Description
Events	array of Event	required	The events that happened during the connection.

Event

Depending on the event Type, it is one of the following:

• Device Command event
• Reservation event
• Resource event
• Price Update event

Device Command event

If the integration is configured to handle commands for some devices, it will receive events whenever a command is created or updated.

Property	Type	Contract	Description
Type	string DeviceCommand	required	Type of the event.
Id	string	required	Unique identifier of the Command.
State	string Command state	required	State of the command.

Reservation event

If the integration is configured to receive reservation updates, it will receive events whenever any change is made to a reservation (created, updated, canceled, etc.).

Property	Type	Contract	Description
Type	string Reservation	required	Type of the event.
Id	string	required	Unique identifier of the reservation.
State	string Reservation state	required	State of the reservation.
StartUtc	string	required	Start of the reservation (arrival) in UTC timezone in ISO 8601 format.
EndUtc	string	required	End of the reservation (departure) in UTC timezone in ISO 8601 format.
AssignedResourceId	string	optional	Unique identifier of the Resource assigned to the reservation.

Resource event

If the integration is configured to receive resource updates, it will receive events whenever a change is made to a resource (created, renamed, state updated).

Property	Type	Contract	Description
Type	string Resource	required	Type of the event.
Id	string	required	Unique identifier of the Resource.
State	string Resource state	required	State of the resource.

Price Update event

If the integration is configured to receive price updates, it will receive events whenever a rate price is created or updated. Events are related to base price updates, price adjustments and category adjustments.

Property	Type	Contract	Description
Type	string PriceUpdate	required	Type of the event.
Id	string	required	Unique identifier of the update event.
StartUtc	string	optional	Start of the price update interval in UTC timezone in ISO 8601 format.
EndUtc	string	optional	End of the price update interval in UTC timezone in ISO 8601 format.
RateId	string	optional	Unique identifier of the Rate assigned to the update price event.
ResourceCategoryId	string	optional	Unique identifier of the Resource category assigned to the update price event.