Custom Mews integration development
Appfront builds custom Mews integrations that let your cloud PMS work in real time with the rest of your hospitality stack: channel managers, payment providers, POS systems, door locks, CRM and BI dashboards. Via the Mews Connector API and webhooks, we synchronise reservations, availability, rates, guest data and transactions. Less duplicate work at the front desk, fewer double bookings, and one reliable view of your property.
What is a Mews integration?
Mews is a cloud-native Property Management System (PMS) for the hospitality sector. It runs the core of your property: reservations, check-in and check-out, housekeeping, billing, and the management of rates and availability. Because everything runs in the cloud, Mews has a strong presence in the Dutch and wider European hotel market and is easy to connect to from other systems.
In practice, a custom integration means: synchronising reservations and availability in real time with a channel manager, processing payments via a payment provider, posting revenue from the bar or restaurant via the POS back to the guest folio, driving door locks and guest apps based on the booking, and making guest data and transactions available to your CRM or BI dashboard. Webhooks pass changes on immediately, so systems stay in step.
Appfront builds in line with the official Mews Connector API documentation and the OWASP ASVS security standard. We align data flows, error handling and synchronisation with your actual front-office processes, so the integration remains reliable, even during peak periods around check-in and check-out.
Real-time reservation sync
Reservations, room assignments and availability stay consistent between Mews and your channel manager, booking engine or in-house system. Webhooks pass new bookings and changes on immediately, keeping double bookings and manual corrections to a minimum.
Occupancy and revenue insight
Occupancy rate, ADR, RevPAR and revenue per channel flow from Mews into your BI dashboard. Revenue management and management see current figures instead of scattered exports, and can adjust rates and availability on a sound basis.
Payment and folio in one flow
We link payments via your payment provider and revenue from the POS back to the correct reservation and guest folio in Mews. Pre-authorisations, deposits and check-out settlement run smoothly, so the front desk needs less manual posting.
Our development process for Mews integrations
We work to a proven methodology that removes uncertainty early and delivers a stable integration. From an initial analysis of your front-office processes, property set-up and the systems that need to talk to Mews, through to go-live and ongoing management, every step is aimed at an integration your team can understand and trust.
We map out which data flows are relevant (reservations, availability, rates, guest data, payments) and which systems Mews needs to connect with: channel manager, POS, payment provider, door locks or BI.
We design the integration architecture around the Mews Connector API and webhooks, choose the right authentication and set out an error-handling strategy.
Implementation with automated tests, structured logging and monitoring. You see working builds along the way.
Controlled go-live with data validation and a safety net, followed by ongoing management and further development.
What a Mews integration delivers in practice
Each Mews integration is set up specifically for your property, front-office workflows and the adjacent systems in your hospitality stack. Below are the features we most often deliver for hotels, hostels and groups that use Mews as the core of their operations.
Reservation and availability sync
Reservations, room allocation, rates and availability stay in real-time sync between Mews and your booking engine or own system. Webhooks push new bookings, amendments and cancellations straight through, so duplicate work and overbookings are avoided.
Payment and POS integration
We link payments via your payment provider and revenue from the bar, restaurant or shop back to the correct guest folio in Mews. Examples include integrations with Mollie, Stripe and your POS till, with pre-authorisations and deposits.
Door locks, keyless and guest app
Based on the reservation in Mews, we control keyless entry systems and door locks and enable digital check-in via a guest app. Guests automatically receive their digital key or PIN code, so the front desk is less busy around arrival.
Channel manager integration
Rates, availability and restrictions flow two-way between Mews and your channel manager, so bookings via OTAs and your own channels don't conflict. New reservations land automatically in the correct room category and rate plan.
CRM, marketing and guest data
We make guest profiles, stay history and preferences available to your CRM and marketing tools for pre-stay, post-stay and loyalty activity. This lets you personalise communication and upsells, while Mews remains the single source of truth for guest data.
BI dashboards and revenue management
We pass occupancy, ADR, RevPAR and revenue by channel from Mews to a BI dashboard such as Power BI. Revenue management can then steer rates and availability on solid data, without separate exports or manual work.
Typical use cases in practice
A Mews integration turns out quite differently for each organisation. We see a number of recurring patterns, and for each of them we have a working setup with attention to data flows, error handling and proper synchronisation between Mews and the surrounding systems.
Independent hotels
Boutique and independent hotels that want their booking engine, channel manager, payments and door locks running around Mews. Reservations and availability stay in sync, the front desk works without double entry, and the guest checks in smoothly. See also our API integrations.
Hostels and flexible stay
Hostels and flexible stay concepts with high guest volumes and many self-service check-ins. An integration between Mews, a guest app and keyless entry enables digital check-in, while payments and bed allocations automatically land in the correct folio and room layout.
Serviced apartments
Aparthotels and serviced apartments with longer stays and self-catering units. We connect Mews to keyless entry, payments and a guest app, so guests can check in and out independently and housekeeping and billing flows run correctly per apartment.
Hotel chains and groups
Hotel chains and hospitality groups with multiple properties that want central control over reservations, revenue and guest data. We consolidate data from multiple Mews environments into a single BI dashboard and connect group-wide payments, CRM and revenue management.
Technology we use
We build Mews integrations using the official Connector API (Open API) and webhooks, combined with the backend stack that suits you. The exact choice depends on the systems around your property, such as channel manager, POS, payment provider, door locks and BI, so that your own team can manage or further develop the implementation.
Why Appfront for your Mews integration?
Appfront has extensive experience building API integrations for a wide range of organisations in the Netherlands. We always start with a thorough analysis of the existing systems and processes. An integration needs to be technically sound, but it also has to add practical value to your front office and operations.
For every integration, we write clear documentation and make sure your own team, or any future supplier, can understand and manage it. No black box, just transparent code and clear agreements on monitoring, alerting and maintenance.
You work with a dedicated point of contact who understands both the technical and the functional side. This keeps communication short, prevents misunderstandings and speeds up decisions when choices need to be made during development.
See also our wider services around API integrations, middleware, custom software development and web app development.
- Experience with the Mews Connector API, webhooks and token authentication
- Specialists in real-time reservation and availability sync
- Familiar with channel managers, POS, payments and keyless entry
- Secure by default — tokens in secure vaults, webhook validation, scoped permissions
- Structured error handling and retry mechanisms
- Comprehensive logging and monitoring from day one
- Clear documentation your team can read and manage
- A fixed point of contact, no account managers passed around
- Ongoing maintenance and proactive further development
- A way of working tailored to your existing hospitality IT landscape
Security and privacy in Mews integrations
In hospitality you constantly handle guests' personal data, such as names, contact details and stay history, and payment integrations also involve payment data. Appfront builds in line with Mews security best practices and the OWASP ASVS. This means, among other things: Mews tokens kept in secure vaults, webhook validation, scoped permissions and regular audits of the reservation and payment flows.
For payment integrations we take PCI DSS into account: card data stays with the payment provider and never unnecessarily touches your own systems. We document the data flows, guest data and payment flows so that your record of processing activities is complete and you can demonstrate compliance with the GDPR. This keeps sensitive guest and payment information to a minimum and well protected.
More on our security approach: information security policy and CVD policy.
- GDPR-compliant data processing and data minimisation
- PCI DSS-conscious setup for payment integrations
- Encryption in transit (TLS 1.2+) and at rest
- Role-based access and least-privilege principles
- Audit logs with traceable data flows
- Automatic retries and dead-letter queues
- Monitoring and alerting for anomalies
- Documentation for your record of processing activities
Frequently asked questions about Mews integrations
Answers to the questions we are asked most often about Mews integrations.
A Mews integration is a technical link between the Mews cloud PMS and another system, such as your channel manager, payment provider, POS till, keyless entry platform, CRM or BI dashboard. Through the Mews Connector API and webhooks, reservations, availability, rates, guest details and transactions are exchanged in real time. An integration can be simple (syncing availability and reservations) or extensive (payments, keyless entry, guest apps and revenue dashboards working together as one cohesive whole).
Mews suits hotels, hostels, serviced apartments and hospitality groups that want a cloud-native PMS with an open API and want their systems to work together in real time. Because Mews offers a well-documented Connector API and webhooks, a reliable integration is very achievable. If you work with a niche or legacy PMS without an open API, custom middleware is sometimes needed; we will then work out together which approach fits best.
A simple integration, for example syncing reservations and availability between Mews and one external system, is usually quicker to deliver than an extensive scenario involving payments, POS, keyless entry and BI dashboards. After an initial consultation in which we map the data flows and the systems involved, we will give you a realistic estimate of the timeline for your situation.
We work with the official Mews Connector API (Open API) and webhooks, combined with the backend stack that suits you: Node.js, Python, PHP or .NET. Authentication runs via Mews tokens (ClientToken and AccessToken) and OAuth where applicable. We make use of the reservations, availability and payments endpoints and, where needed, connect channel managers, POS systems, payment providers and BI tools such as Power BI.
Costs are determined by the complexity of the data flows, the number of systems to connect, the required synchronisation frequency and the amount of custom business logic. Ongoing management, monitoring and support also affect the total investment. We always provide a clear quote following a no-obligation analysis of your situation.
Yes. In hospitality you handle guest data and often payment data, so security is central. Appfront builds in line with the OWASP ASVS: Mews tokens held in secure vaults, webhook validation, scoped permissions and separate rights per integration. For payment flows we take PCI DSS requirements into account and leave card data with the payment provider. We document the data flows so that your record of processing activities remains complete and you can demonstrate GDPR compliance.
Yes. Appfront regularly takes over existing Mews integrations, even where they were originally set up by another party. We review the Connector API integrations, webhook configuration, data flows and error handling, document the current setup and propose improvements. From that point on, we handle adjustments, extensions and monitoring, including timely rotation of tokens.
Mews suits hospitality organisations that want a modern, cloud-native PMS: independent hotels, hostels, serviced apartments, and hotel chains or groups with multiple properties. Typical integrations include channel managers, payment providers, POS tills, keyless entry and guest apps, CRM and marketing, and BI or revenue management dashboards. For very specific legacy systems without an open API, we will work with you to determine whether additional middleware is needed.
Ready to build your Mews integration?
Tell us which systems you would like to work alongside Mews (channel manager, payments, POS, door locks, CRM or a BI dashboard) and which reservation and guest data need to be synchronised. We are happy to help you design the right setup via the Connector API and webhooks. A no-obligation first conversation will give you a clear picture of the possibilities within half an hour.