STATeless marketplace intelligence

Active Market Price Estimator

Compare current eBay asking prices using auditable, category-aware matching. No account login and no database.

No DB Server-side secrets Active listings only

Condition Listing evidence Marketplace Price basis

Current purchasable listings

Estimate summary

Waiting for search

Active asking range — Interquartile range (Q1–Q3), including listed shipping

Median delivered price — Not a completed-sale price

Confidence

—0

Based on count, match, spread, and uniqueness

Comparable coverage — No audit data yet

Top eBay comparables

Ranked by category/query relevance; estimates use delivered asking price.

Sort

Item	Condition	Item price	Shipping	Delivered	Match	Action
Run a search to load active listings.

Select a comparable

Open an item from the dashboard to inspect the current-session evidence.

ACTIVE ASKING-PRICE EVIDENCE

Valuation context

Session

Selected delivered price—

Market median—

Match score—

—Market range—

Why this item matched

Deterministic matcher signals preserved from the current request.

Select a listing to see its evidence.

Exclusion audit

Listings omitted as duplicates, accessories, mismatches, or statistical outliers.

0

No result loaded.

NO DATABASE

Ephemeral session

This build deliberately keeps only the current result in JavaScript memory. Refreshing the page clears it.

Persistence disabled

1

Browser input

Query and optional image are submitted to a same-origin server route over HTTPS.

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2

Server processing

Production credentials stay server-side. OAuth token cache lives only in process memory.

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3

Current response

Normalized listings and an active-market estimate return to this tab. Nothing is persisted.

Current in-memory snapshot

No search has been run in this page session.

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No current result

Run a search from the dashboard. The snapshot is discarded on reload.

RUNTIME & EXTENSIBILITY

Sources, categories, and MCP

Operational view of what the Site can call, what it stores, and how direct ChatGPT access differs from the web UI.

ebay

eBay Browse API

Checking

Application-token access to current purchasable listings. Prices are treated as active asking-price evidence.

Environment: —
Grant: Client credentials
Marketplace: —
Storage: None

!

Production access gate

A Production keyset and OAuth token do not guarantee that eBay enabled restricted Buy APIs for the application. Confirm Browse API production approval before launch; the app surfaces upstream authorization errors without leaking credentials.

OPTIONAL PHASE

Direct ChatGPT tool access

Separate MCP endpoint

ChatGPT conversation

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HTTPS /mcp

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Shared stateless estimator

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eBay API

The Site itself is a hosted web experience. Direct ChatGPT tool calls require a separate remote Apps SDK/MCP server and eligible Developer mode access. The included contracts make that adapter straightforward, but MCP is not required for the Site; account and workspace plan availability still applies.

search_active_listingsestimate_active_marketget_listing