Model Context Protocol · v1.0

Run your auctions from Claude.

Hammerwerks ships with a built-in MCP server. Connect Claude Desktop, Cursor, ChatGPT (custom GPT), or any MCP-compatible client to your tenant. List auctions, approve lots, generate seller statements, query analytics — all from your assistant, with full audit-log visibility.

Full install guide →

13 tools across reads & writes.

Read tools are safe; write tools are audit-logged on every call.

Read tools

  • list_auctions — filter by status
  • get_auction — full detail + counts
  • list_lots — browse per-auction
  • get_lot — photos, bids, AI confidence
  • search_lots — full-text across tenant
  • list_bidders — KYC filter
  • get_invoice — line items + payments
  • list_invoices — per-auction or status filter
  • get_analytics — sell-through, gross, top brands

Write tools (audit-logged)

  • create_auction — new draft auction
  • approve_lot — review → approved
  • update_lot — edit fields safely
  • record_payment — cash/check/wire log

Deliberately NOT exposed: delete operations, refund-by-fiat, cancellations, KYC overrides. The MCP surface is for routine ops; destructive operations stay in the admin UI.

Set up in three steps.

  1. Create an API key. Sign in to Hammerwerks, go to Settings → API keys, click Create key. Name it after the client (e.g. "Claude Desktop"). The key is shown once. Copy it.
  2. Add to your client. For Claude Desktop, edit ~/Library/Application Support/Claude/claude_desktop_config.json (or the Windows equivalent):
    {
  "mcpServers": {
    "hammerwerks": {
      "transport": "http",
      "url": "https://api.hammerwerks.com/mcp",
      "headers": {
        "Authorization": "Bearer hw_yourtenant_xxxxxx"
      }
    }
  }
}
  3. Restart your client and ask. "List my open auctions." — your assistant connects, discovers the 13 tools, calls list_auctions, returns the result.
Full install guide with security model →

The first auction-software vendor with MCP support.

As of 2026, no other auction SaaS — Gavelry, HiBid, BidWrangler, NextLot, AuctionFlex — ships an MCP server. We do.

This matters most for the operators who run their shop on a MacBook and use Claude every day. Ask the assistant for analytics, have it batch-approve lots above a confidence threshold, generate a draft seller statement before you walk in to a consigner meeting. Every write is audit-logged in your tenant graph; you can see exactly what the assistant did, when, under which API key.