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Build property software that connects directly with Quardlyn.

Synchronise properties through the production CRM API, manage listings, upload media, track lifecycle changes and test outbound webhook simulations in sandbox. Available in minutes.

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Latest API Version
v1.0
API Status
Operational
Supported
Property CRM integrations
Changelog
CRM API v1 public baseline

Webhook Guide

Download guide
Beta / Sandbox Simulation Only. Quardlyn does not currently send production HTTP webhooks from Quardlyn to CRM/developer endpoints. The production launch integration is CRM to Quardlyn API.

CRM to Quardlyn API

Production supported. CRMs push signed create, read, update, delete, lifecycle and media changes to Quardlyn.

Quardlyn to CRM Webhooks

Sandbox simulation only. Logs and replay rows are retained as future architecture scaffolding.

Signing

Sandbox simulations use the Webhook Signing Secret. Production API calls use the API/HMAC Signing Secret.

Sandbox Simulation Event Names

property.createdproperty.updatedproperty.deletedproperty.withdrawnproperty.archivedproperty.restoredproperty.reactivatedproperty.sync.testproperty.sync.failed

TopicDocumented Behaviour
Production deliveryNot currently available for outbound Quardlyn-to-CRM webhooks.
Sandbox triggerSandbox property lifecycle, sync test and sync failure simulations.
ReplayReplay is a sandbox inspection tool; it does not perform production HTTP delivery.
Failure HandlingFailure rows are simulated for partner resilience testing.
Production alternativeUse the CRM-to-Quardlyn Property API and read/list/lookup endpoints for synchronisation.

Example Payload

{
  "event": "property.updated",
  "external_ref": "CRM-001",
  "occurred_at": "2026-07-01T12:00:00Z",
  "property": {
    "external_ref": "CRM-001",
    "department": "sale",
    "display_address": "10 High Street, London"
  }
}