SlabGrad v3.1 · Live Marketplace Connector

Research live eBay listings without exposing your API secret.

Search active graded-card listings through SlabGrad’s secure WordPress REST proxy. Results can support pricing research, Vault reviews, and listing discovery.

Demonstration mode · server credentials required

SlabGradPrivate REST proxy

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OAuthServer token cache

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eBayBrowse API

Listings found—

Lowest asking—

Average asking—

Highest asking—

Live inventory research

Marketplace results

Awaiting search

The secure connector is installed, but no credential is embedded in this package. Configure your newly rotated keys on the server to enable live searches.

Vault valuation research

Compare active asking prices beside acquisition cost and stored Vault records.

Listing discovery

Open the original eBay listing in a new tab while preserving the source URL.

Server-side security

Client secrets remain server-side. Application tokens are cached and never returned to the browser.

Production expansion

User OAuth, Inventory API listing tools, business policies, and seller analytics are staged for the next backend phase.

Data boundaries

This connector uses eBay’s Browse API for active listings. Asking prices are not verified completed-sale prices and are not appraisals. Marketplace Insights sold-history access is restricted, so SlabGrad does not label active-listing averages as sold comps. Live production use remains subject to eBay access approval, API policies, rate limits, and applicable agreements.