Define the property management API integration outcome
A property management API integration should solve a named operating problem, such as keeping property records aligned, creating contacts from an approved source, or notifying another system when a showing changes. Starting with every available endpoint usually creates unnecessary coupling.
Write the before and after workflow, the systems involved, the data owner, and the failure response. If staff cannot explain what should happen when the integration is unavailable, the design is incomplete.
Choose a system of record for each object
Do not declare one universal system of record without examining the objects. A property may be mastered in one platform, contact engagement in another, and showing availability in a calendar. Assign ownership field by field when necessary.
Document which system may create, update, and delete each object. Prefer stable external identifiers and store the mapping explicitly rather than matching records by mutable names, phone numbers, or addresses alone.
- Object and authoritative system
- Stable internal and external identifiers
- Allowed create, read, update, and delete operations
- Conflict-resolution rule
- Retention and deletion behavior
- Manual correction path
Separate read access from write access
Begin with the least privilege needed. A reporting integration may need only read access. A workflow that creates contacts or updates showings needs write access, stronger validation, and a clearer rollback plan.
Use separate credentials by environment and integration, restrict scopes where supported, rotate secrets, and never place credentials in client-side code or logs. Confirm current plan requirements before designing around a specific endpoint.
Design webhooks for retries and duplicates
A webhook is a notification, not guaranteed proof that the receiver processed the event exactly once. Verify signatures, acknowledge quickly, process asynchronously when needed, and make the handler idempotent so a retry does not create a duplicate contact or showing.
Store the event identifier, type, timestamp, delivery attempt, processing result, and related object identifiers. Handle events that arrive late or out of order. Never assume the network will deliver one clean sequence.
- Signature verification before processing
- Replay and timestamp checks
- Idempotency key or processed-event store
- Bounded retries with backoff
- Dead-letter or manual review path
- Redacted, searchable operational logs
Add reconciliation and observability
Even a reliable webhook path needs reconciliation. Run a periodic comparison that detects missing, duplicated, or conflicting records and reports which system should correct them. Define thresholds that page an operator versus issues that can wait for routine review.
Monitor authentication failures, rate limits, webhook age, retry counts, queue depth, processing latency, and reconciliation differences. Logs should identify the event without exposing sensitive prospect data.
Roll out the integration in reversible phases
Start in a test environment, then use read-only production access, shadow writes, a bounded property group, and finally broader rollout. Preserve a way to disable writes without losing visibility. Rehearse credential rotation and event replay before the integration becomes critical.
Rentalot provides plan-based API access, with write operations and webhooks available on eligible plans. Review the current API documentation and pricing before implementation. A successful integration has clear ownership, observable failures, and a tested recovery path, not merely a working demo.