BStalker, inside ChatGPT.

What a buyer asks

1. Describe what you buy. Say it the way you would to a person: the category, the condition, where you can pick up. ChatGPT searches the live feed for matches.
2. Compare real lots. The matches line up side by side: seller contents, recorded bid and shipping, closing time, and what is not known.
3. Model your bid ceiling. Hand it your budget, freight and premium figures, and it returns the maximum bid those numbers support. Your arithmetic, not a recommendation.

The nine tools

• search_inventory: Finds current listings matching a stated need, as a bounded shortlist with source links and last-checked times.
• get_lot: Reads one lot's seller-reported facts, manifest summary, source links and freshness.
• read_manifest: Reads a page of the seller-published manifest lines for a lot.
• summarize_manifest: Aggregates a lot's full manifest into unit and retail totals plus brand, category and condition mixes; unreported attributes stay unknown.
• get_auction_history: Returns the 90-day panel of comparable observed auction bids for a lot: observed bids, not confirmed sales.
• compare_lots: Lays 2 to 4 chosen lots side by side (contents, recorded costs, deadlines), with no best-buy ranking.
• calculate_bid_ceiling: Computes a maximum bid from the buyer's own budget, freight, premium and reserve figures; it models the buyer's assumptions, not a recommendation.
• list_closing_soon: Lists live lots whose source-published deadline falls inside a chosen window (default 24 hours), soonest first; lots without a deadline never appear, and deadlines can change at the source.
• prepare_saved_search: Turns a described buying brief into a saved-search link to review on bstalker.com; no alert is created.

How to connect

1. In ChatGPT, open Plugins, choose Add, then “Add custom MCP server”.
2. Paste the server address: https://bstalker.com/mcp.
3. ChatGPT sends you to bstalker.com to sign in and approve the connection.
4. Start asking. Disconnect anytime in Settings → Connections.

What it costs

The connector is included with a paid subscription: Full Access at $9.99 a month, or $99.90 a year with two months free. A 3-day trial of everything starts at checkout: a card is required, nothing is charged for those 3 days, and the first charge lands on day 4. Cancel before then and you pay nothing. One trial per account. See the plans.

What it never does

• Never bids, never buys. Bidding happens on the source marketplace, signed in to your own account there. The connector cannot place a bid, and BStalker never takes payment for a lot.
• Never creates alerts. prepare_saved_search hands you a link; you review it and save the search on bstalker.com yourself.
• Never guesses. A cost the record does not hold, like freight the platform did not quote or a missing manifest, comes back as unknown.
• Never sells. There is no checkout inside ChatGPT.
• You can disconnect anytime in Settings → Connections, which revokes ChatGPT’s access.