Exactly what works with SellDeck today — no vague promises, no "coming soon" placeholders, no tiers buried in fine print.
API-, webhook-, or extension-backed. Connect once, then SellDeck syncs continuously.
The reason SellDeck exists. Live-show prep, real-time sales feed, and post-show payout reconciliation in one place.
The deepest non-Whatnot integration we have. OAuth + real-time webhooks + sold-comp lookup.
Listing sync with mark-as-sold and recreate-on-resume. Honest fact: Depop's quantity API is not yet exposed, so multi-quantity sync is one-way.
Power-user setup for marketplaces where we don't have production API approval but you can.
Etsy declined SellDeck's production API application in May 2026 with no appeal channel. The full integration code is shipped — but you provide the keystring.
Marketplaces where the seller stays in the loop because the public API doesn't (yet) support what's needed.
Mercari has no public listing or delist API. SellDeck supports inventory tracking and CSV-export workflows for sellers who list there.
Poshmark has no public API for third-party tools. We track demand for Poshmark integration but cannot promise a delivery date that depends on Poshmark opening their platform.
The infrastructure that makes SellDeck itself work.
Subscription billing, secure checkout, and proration when you change plans.
The AI behind photo-based price estimates. Bring your own API key on Pro/Business or use shared usage credits on Starter.
Printable shipping labels and QR-coded packing slips. SellDeck generates labels in standard formats; you print + ship.
Other tools claim “1500+ marketplaces” on their homepage. Here's how we think about it.
Every marketplace marked “Full Integration” above has been load-tested under real seller workloads. We have 312 automated tests guarding the core dispatch contracts and have shipped these integrations to production.
Not every marketplace lets every tool integrate. When a platform's policy blocks us but allows individual sellers, we'd rather give power-users a path forward than hide the limitation.
If a marketplace has no API at all, we say so. SellDeck still helps you track that inventory, calculate profit, and prepare for tax time — we just won't pretend we can auto-delist when we can't.
Tell us where you sell. We track demand for new integrations and prioritize based on the platforms our customers actually use.
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