A hotel channel manager works through two-way API connections between your PMS and each OTA. When availability or rates change in your PMS, the channel manager pushes those updates to all connected OTAs simultaneously. When a booking arrives from any OTA, the channel manager receives it, sends it to your PMS and immediately reduces availability on all other channels — all within seconds, automatically.
The Technology Behind a Channel Manager
A channel manager connects to OTAs through APIs — Application Programming Interfaces. An API is a standardised communication protocol that allows two software systems to exchange data automatically. Each major OTA (Booking.com, Expedia, Agoda) provides an API that channel managers use to send and receive data.
The channel manager acts as a central hub. On one side, it connects to your PMS (or holds its own inventory database). On the other side, it maintains live API connections to every OTA you are listed on. Data flows in both directions through these connections.
The Two-Way Data Flow
Outbound: Pushing Availability and Rates to OTAs
When you update availability or rates in your PMS or channel manager, the change is pushed to all connected OTAs simultaneously. This happens automatically — you make one change, and it appears on every platform within seconds.
Outbound updates include:
- Availability (how many rooms of each type are available on each date)
- Rates (the price for each room type, rate plan and date)
- Restrictions (minimum stay, stop-sell, closed to arrival)
Inbound: Receiving Bookings from OTAs
When a guest books a room on Booking.com, Booking.com sends the reservation data to the channel manager via the API. The channel manager then:
- Receives the booking details (guest name, dates, room type, rate, payment method)
- Sends the booking to the PMS, creating a new reservation automatically
- Reduces available inventory by one room on those dates
- Pushes the updated availability to all other connected OTAs immediately
This entire process takes seconds. By the time the guest receives their booking confirmation from Booking.com, the availability on Expedia, Agoda and your direct booking engine has already been updated.
The Role of the PMS in the Connection
The PMS holds the master inventory — the definitive record of how many rooms are available on each date. The channel manager reads from this inventory and distributes it to OTAs.
When a booking comes in from any source (OTA, direct, phone), the PMS inventory is reduced. The channel manager then pushes the updated inventory to all OTAs. This single source of truth is what prevents overbookings.
For hotels where the PMS and channel manager are separate systems, they connect through an API. For hotels using an integrated platform like Frontdeskey, the PMS and channel manager share the same database — which means updates are even faster and more reliable.
What Happens When a Booking Comes In
Here is the complete sequence of events when a guest books a room on Booking.com:
- Guest selects dates and room type on Booking.com and completes the booking
- Booking.com sends the reservation data to the channel manager via API
- Channel manager creates a new reservation in the PMS
- PMS reduces available inventory for that room type on those dates
- Channel manager pushes updated availability to all other connected OTAs
- Booking confirmation is sent to the guest (by Booking.com and/or the PMS)
- The reservation appears in the PMS reservation calendar, ready for check-in
The entire process is automatic. No staff member needs to do anything.
Rate Management Through the Channel Manager
Beyond availability, a channel manager also manages rates across all channels. You can:
- Set a base rate and have the channel manager automatically calculate OTA rates (e.g. base rate + 15% to cover commission)
- Apply different rates to different channels
- Push rate changes to all channels simultaneously with one update
- Set seasonal rates that apply automatically on the correct dates
For more on rate strategy, see: Managing Hotel Rates Across Multiple Channels.
What Is a "Pooled Inventory" Channel Manager?
There are two approaches to how channel managers manage inventory across channels:
Allocated Inventory
Each channel is allocated a fixed number of rooms. If you have 10 rooms and allocate 3 to Booking.com and 3 to Expedia, you can only sell 3 rooms on each platform regardless of demand on the other. This approach is outdated and leads to unsold rooms.
Pooled Inventory
All channels draw from the same pool of available rooms. If you have 10 rooms available, all 10 are available on every channel simultaneously. The first channel to receive a booking gets the room, and availability is reduced across all channels immediately. This maximises occupancy and is the standard approach for modern channel managers.
Frontdeskey Channel Manager
Frontdeskey's channel manager uses pooled inventory and real-time two-way API connections to keep availability and rates synchronised across all your booking channels automatically.
Learn more about the Frontdeskey Channel Manager or book a free demo.