Car Sharing API & Webhooks

Car sharing operations often involve external systems: CRM, dispatch, accounting, BI, and compliance tooling. API and webhook integrations let you automate these workflows instead of relying on manual exports.

This article focuses on integration strategy for car sharing events.

Integration Building Blocks

Component	Purpose
API Keys	Authenticate server-to-server calls
Webhooks	Receive near-real-time event notifications
Idempotent Consumers	Prevent duplicate processing in your systems
Retry Handling	Recover from transient failures safely

For core setup, see API Keys and Webhooks.

Most operators start with these event categories:

Domain	Typical Events
Reservations	Created, updated, canceled, no-show
Rental Sessions	Check-in started, active, completed, canceled, expired
Vehicle Availability	Blocked windows, external calendar conflicts
Incidents/Claims	Damage reported, claim opened, claim resolved
Violations/Disputes	Violation matched, disputed, charged
Billing	Charge succeeded, charge failed, refund processed

Subscribe only to events you can process immediately; expand incrementally.

Recommended First Integrations

1. Support / CRM

Send reservation and incident updates into your support queue with:

customer identifiers
session/reservation IDs
severity or reason category
latest status and timestamps

2. Accounting / Finance

Sync finalized billing events for:

rental charges
surcharges and fees
refunds and adjustments
violation and claim recoveries

3. Ops Monitoring

Trigger operator alerts for:

repeated command failures
no-show spikes
check-in/check-out timeout anomalies
abnormal dispute volume

Payload and Processing Guidelines

Use these standards for reliability:

Treat webhook delivery as at least once.
Deduplicate by event ID and processed timestamp.
Make handlers idempotent.
Persist raw payloads before business logic.
Return success quickly, then process asynchronously where possible.

Suggested Event Record Fields in Your System

Field	Why It Matters
event_id	Deduplication
event_type	Routing logic
occurred_at	Ordering and replay
resource_id	Link to reservation/session/charge
tenant/subaccount_id	Multi-operator isolation
delivery_attempt	Retry diagnostics

Security and Compliance

Apply these controls for production integrations:

Verify webhook signatures before parsing payload content.
Rotate API keys on a regular schedule.
Restrict key scope to minimum required access.
Store secrets in a secure vault, never in source code.
Log failed verification attempts with source IP and headers.

Failure Handling Pattern

When downstream systems fail:

Acknowledge valid webhook deliveries to avoid unnecessary retries.
Place processing failures into a dead-letter queue.
Retry with exponential backoff.
Alert on age/size of failed queue.
Replay safely once the dependency recovers.

This avoids data loss and prevents duplicate side effects.

Example Automation Flows

Trigger	Automation
Reservation no-show	Open support task + apply configured policy outcome
Damage claim created	Create claims case, request additional documentation
Violation disputed	Route to compliance reviewer with SLA timer
Charge failed	Trigger payment retry workflow and customer reminder
Check-out timeout	Create operator intervention task

Versioning and Change Management

Keep integrations stable over time:

Version your internal event contract mapper.
Track schema changes in a changelog.
Test webhook consumers in staging before production rollout.
Keep backward compatibility for a deprecation window.

Operational Observability

Track these integration health metrics:

Webhook success rate
Median and p95 processing latency
Dead-letter queue depth
Duplicate event ratio
End-to-end lag from event occurrence to downstream completion

Instrumentation here is as important as the API client itself.

Need Help?

For integration architecture guidance, contact us at support@levyelectric.com with your target systems and expected event volume.