The whole platform, end to end.

LongboxSync is a real SaaS — multi-tenant, encrypted, monitored, and shippable to the Shopify App Store. Here's what's inside.

Sources

Whatever you already use, we ingest as-is.

ComicBase

API integration + CBIX import. We respect your existing publisher / variant tags.

CLZ Comics

Direct CLZ Cloud export support with field mapping.

HipComic

API source adapter with manual + scheduled refresh.

CSV / Manual upload

Drop a .csv, .cbix, or .xlsx in the dashboard and we'll parse the columns automatically.

Destinations

Push to every marketplace your customers shop.

Shopify

OAuth install, variants + inventory + price sync, real-time order reconciliation.

eBay

Sell API + Inventory + Fulfillment. ECDSA-signed notification verification.

Etsy

Open API v3 with PKCE OAuth, listing publish, receipt webhooks.

HipComic outbound

Push inventory back into HipComic for cross-promotion.

Sync engine

The invisible work that keeps everything aligned.

Smart delta sync

Per-item content hash. We only push what actually changed — no surprise rate-limit bills.

Celery-backed workers

Every sync runs in a queued background task with retry + timeout. Bulk jobs survive deploys.

Webhook reconciliation

Order webhooks decrement the source within seconds so no marketplace oversells.

Scheduled sync (Pro+)

Per-tenant cadence from 5 minutes to daily. Pause/resume from the dashboard.

Security & ops

Built like a SaaS, not a script.

Encrypted credential vault

Marketplace tokens stored with envelope encryption. We can't read them; you can revoke any time.

Per-tenant isolation

Every query is scoped by tenant_id. Audit logs and Sentry events are tagged automatically.

Alerting

Email + webhook alerts when a sync fails, a credential expires, or a marketplace returns 4xx.

GDPR mandatory webhooks

customers/data_request, customers/redact, shop/redact all signed-and-verified out of the box.

Ready to wire it up?

Onboarding takes under five minutes. Cancel from the dashboard any time.

Start free trial