Developer Platform

A private API for integration partners

Best Guest is building an API so PMSs, channel managers, and booking engines can offer Czech guest-registration compliance directly inside their own product.

The Best Guest API is currently private and available to selected partners under agreement. It is not open for public self-service access.

Why integrate with Best Guest

Your Czech customers need guest registration, UbyPort reporting, e-Turista readiness, and local accommodation fee compliance. Best Guest handles it — your platform can offer it as a built-in feature instead of sending customers elsewhere.

Developer Platform

Capabilities

The scope we're building toward with partners. Availability and final shape depend on the partnership agreement.

📅

Reservation API

Push bookings into Best Guest so guest registration starts automatically.

✅

Check-in API

Trigger and track online guest check-in without leaving your product.

🛡️

Compliance API

Read back registration status, house book entries, and fee calculations.

🏛️

UbyPort Reporting

Foreign-guest reports filed with Czech authorities on your customers' behalf.

🔔

Webhooks (planned)

Real-time events for registration completion, fee reports, and reservation changes — on our near-term roadmap; today, poll a reservation's status instead.

🧪

Sandbox

We'll set your integration up with a demo workspace to build and validate against before you go live with real guest data.

📦

SDKs

Client libraries planned to speed up integration for common partner stacks.

🔒

Security & Data Residency

GDPR-aligned handling of guest data, hosted in the EU.

Illustrative example

POST /v1/upsertReservation
Authorization: {partner_api_key}
Content-Type: application/json

{
  "externalId": "your-own-booking-id",
  "accommodationId": 4821,
  "listingIds": [10432],
  "fromDate": "2026-08-14",
  "toDate": "2026-08-18",
  "personsCount": 2,
  "countryOfResidence": "Germany",
  "recipientLanguage": "en",
  "email": "guest@example.com"
}

→ HTTP 200
{
  "result": true,
  "data": {
    "reservationId": 9310,
    "externalId": "your-own-booking-id",
    "created": true,
    "status": "NOT_COMPLETED",
    "checkinUrl": "https://app.bestguestapp.com/..."
  }
}

Illustrative example only — final schema may differ. Access is available only under a partnership agreement.

Request API access

Tell us about your platform and we'll get back to you about a partnership.