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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.

Get StartedAPI DocsDownload PostmanSDKsDeveloper Account
Latest API Version
v1.0
API Status
Operational
Supported
Property CRM integrations
Changelog
CRM API v1 public baseline

Getting Started

10-20 minute path

Use this checklist to go from a new Quardlyn developer account to sending your first sandbox property without internal help.

Goal: create a sandbox application, copy the sandbox credentials, send a canonical property, test lifecycle changes, inspect sandbox webhook simulations, then run certification before requesting production access.
1. Create Developer AccountRegister, verify your email, then open the Developer Console.
2. Create Sandbox ApplicationGo to Applications and create a sandbox application.
3. Copy Sandbox API Key and SecretSave the one-time API key and signing secret shown after creation.
4. Import Postman CollectionDownload Postman and set sandbox_key, sandbox_secret and base_url.
5. Read Canonical Property SchemaReview required fields and media fields in the Canonical Schema.
6. Create Your First PropertySend POST /api/v1/sandbox/crm/properties or use the API Explorer.
7. Inspect Sandbox Webhook SimulationsUse your sandbox application webhook simulation logs and inspect simulated events in Webhook Logs.
8. Test Updates and DeletionsRun PUT, PATCH, withdraw, restore and DELETE flows.
9. Run Certification ChecklistUse the Certification Guide and the downloadable integration checklist.
10. Request Production AccessAfter sandbox certification passes, contact Quardlyn with your report and request production credentials.

First Property in Postman

Download PostmanDownload Schema

Endpoint

POST {{base_url}}/api/v1/sandbox/crm/properties

The Postman collection signs requests automatically when sandbox_key and sandbox_secret are set.

Minimal Payload

{
  "request_id": "getting-started-001",
  "property": {
    "external_ref": "CRM-GS-001",
    "department": "sale",
    "display_address": "10 Sandbox Street, London",
    "postcode": "SW1A 1AA",
    "price": 425000,
    "bedrooms": 3,
    "media_image_00": "https://example.com/property/front.jpg"
  }
}
What to checkWhere
Request accepted and returns successPostman response body or API Explorer response.
Property stored in sandboxDeveloper Console / Sandbox
API request loggedDeveloper Console / API Logs
Sandbox webhook simulation visibleDeveloper Console / Webhook Logs
Usage counter updatedDeveloper Console / Usage

Before Inviting CRM Vendors

Recommended dry run

Run one real integration yourself using only the public documentation, Postman collection and sandbox credentials. Do not rely on internal shortcuts.

Integration Journey

  • Create a property.
  • Update it.
  • Upload images.
  • Withdraw it.
  • Delete it.
  • Inspect sandbox webhook simulations.

Confidence Gate

If this journey can be completed from public docs alone, external CRM developers should have enough context to start integrating with Quardlyn.

Open Certification