# Unified PMS API

Canonical: https://brew.new/templates/onseason/unified-pms-api

Brand: onseason.ai
Category: product-update

![Preview of Unified PMS API](https://cdn.brew.new/email-preview-utM9akYOh4pqwU7FtKm8T-1787853305618.png)

## Email content

OnSeason

PRODUCT UPDATE · UNIFIED PMS API

One API. Every property management system.

Connect once and read listings, rates, availability, and reservations from 40+ PMS platforms through a single schema. No per-PMS integration work.

40+

PMS integrations

28k+

properties connected

400+

developers on Calry

// Connect once. Access everything.

GET /v1/properties?pms=guesty

GET /v1/properties?pms=hostaway

GET /v1/availability/:propertyId

// Same endpoint shape for any PMS

WHAT SHIPS WITH IT

Common data model

Properties, availability, rates, reservations, and guest records normalised into one schema.

Real-time sync

Webhooks push availability, rate, and booking changes. No polling, no stale data.

Managed auth

OAuth flows, token refresh, and credential storage handled on our side.

Developer-first DX

REST endpoints, SDKs, sandbox environments, and full reference docs.

Engineers reviewing a Calry integration on a laptop

WHO IT'S FOR

✓

SaaS builders — skip six months of PMS integrations and ship on one contract.

✓

Property managers — wire in-house dashboards and custom tools straight to your PMS.

✓

Tour operators & agencies — pull rental inventory programmatically for custom booking flows.

BUILD ON IT

The same API OnSeason runs on.

It powers our AI Website Builder and Booking Engine. Read the endpoint reference and connect a sandbox PMS today.

Read the API docs

OnSeason logo

Get Direct Bookings in the AI Era

Pricing · Blog · Contact

XInstagramLinkedInFacebook

© OnSeason. All rights reserved.

careers@onseason.ai

Unsubscribe

[Open and remix this design](https://brew.new/templates/onseason/unified-pms-api)

[Browse email designs](https://brew.new/browse/templates)