ALT/FNDATA MCP Server

Connect your AI assistant to luxury and collectibles auction data. Query watches, jewelry, loose gemstones, handbags, cars, motorcycles, aircraft, wine and whisky, fine art, works of art, design, fashion, shoes, automobilia, books, coins, perfume, accessories, musical instruments and other vehicles from 100+ global auction houses, in plain language.

It uses the open Model Context Protocol (MCP), so it works with Claude, ChatGPT, Perplexity and other assistants and developer tools that support MCP servers.

Quick Start

1. Get an API Key

Get your key from API Key & MCP in the ALT/FNDATA app.

2a. Connect the hosted server (no install)

In any assistant that supports remote MCP servers (often called custom connectors), add a connector with this URL:

https://mcp.altfndata.com/mcp

Choose OAuth if you are asked for an authentication method. A sign-in page then asks for your ALT/FNDATA API key.

• Claude: Settings → Connectors → add a custom connector.
• ChatGPT: add it as a custom connector (developer mode). ChatGPT only connects to hosted servers, so use this option.
• Perplexity: Settings → Connectors → add a custom connector with the URL above.

Menu names and plan availability are set by each assistant and change over time; check its help pages if the steps differ.

2b. Or run it locally

For desktop apps and developer tools that launch MCP servers on your machine:

pip install altfinance-mcp

Most tools take a configuration in this shape; add it to the tool's MCP settings and restart it.

Example, Claude Desktop: the config file is %APPDATA%\Claude\claude_desktop_config.json on Windows and ~/Library/Application Support/Claude/claude_desktop_config.json on macOS.

{
  "mcpServers": {
    "altfinance": {
      "command": "altfinance-mcp",
      "env": {
        "ALTFINANCE_API_KEY": "your-api-key-here"
      }
    }
  }
}

Example, Claude Code:

claude mcp add altfinance -- altfinance-mcp

Set the env var before launching:

export ALTFINANCE_API_KEY="your-api-key-here"

What You Can Ask

Once connected, ask your assistant questions like:

• "What tables are available in the ALT/FNDATA database?"
• "Show me the schema for the watches table"
• "Find the top 10 most expensive Rolex watches sold after 2020"
• "How many Hermes handbags were sold by Christie's?"
• "Give me market stats for Patek Philippe watches sold at Phillips"
• "How have Hermes Birkin prices moved over the last five years?"
• "Price-check a Rolex Daytona 116500 white dial"
• "Search the whole market for a Burma ruby ring over $50k"
• "What loose sapphires have sold at auction?" (uses gems, not jewelry)

Available Tools

All 9 tools are read-only and annotated with readOnlyHint: true. No data is modified by any tool.

Tool	Description
list_tables	Lists the 20 available tables with live descriptions and column counts
get_table_schema	Shows column names and types for one table
query_table	Queries a table with filters, sorting, field selection, and pagination
market_stats	Realized-price summary for a table or filtered segment: count of sales, median, 25th/75th percentiles, average, min/max, sale-date span, and top vendors by volume
price_trend	How realized prices moved over time, bucketed by year, quarter, or month (count, median, average per period)
price_check	Fair-value range for a single item from comparable sales, with source links. Live comp categories: handbags, watches, cars
search	Whole-market keyword search across every category at once, merged by realized price. With no category it fans out across all 20 tables
market_index	Precomputed model-level price index (low / 25th / median / 75th / high, sample size, trend) for a brand or model. Covered categories: handbags, watches, cars
list_alerts	Read-only view of price alerts, or guidance on enabling them. See "Price alerts are read-only" below

Every tool carries readOnlyHint and openWorldHint.

Price alerts are read-only

Price alerts belong to a signed-in ALT/FNDATA account (Cognito login), not to an API key. The MCP authenticates with an API key only, so it cannot create or enable alerts, and the alerts feed itself is not reachable for an API-key caller. list_alerts therefore either reports fired alerts (when a session makes the feed reachable) or returns guidance on setting alerts up in the app at app.altfndata.com. Alert allowance by plan: free 0, registered 1, collector 10, pro 100, included with Membership.

Feature and plan suggestions

Some tool responses may append a single short "💡" line suggesting a complementary ALT/FNDATA product or a plan upgrade. This happens at most once per response, only at a genuine tier boundary (a table your plan does not include, or an exhausted row quota) or as a relevant feature tip, and never for unlimited or comp accounts. It never changes the data returned.

Query Capabilities

• Filter by any column using operators: eq, neq, gt, gte, lt, lte, like, in, not_in, is_null, is_not_null
• Sort by any column, ascending or descending
• Select specific fields to return
• Paginate with limit/offset (max 500 rows per request)

Data Coverage

The database spans 20 tables. Call list_tables for the live set with current column counts.

Table	Description
watches	Luxury watch auction results
handbags	Luxury handbag auction results
jewelry	Finished jewelry, mounted pieces (rings, necklaces, bracelets, earrings) set with gemstones
gems	Loose, unmounted gemstones (single stones and parcels). Use this for gemstone valuations, not jewelry
automobile	Collector car auction results
motorcycle	Collector motorcycle auction results
aircraft	Aircraft auction results
wine_whisky	Wine and whisky auction results
works_of_art	Works of art with stone/jewelry relevance (jade, jadeite, diamond-set, etc.)
fine_art	Fine art auction results across all movements and periods
design	Design and decorative arts: furniture, lighting, glass, ceramics, studio/industrial design
fashion	Fashion and couture: clothing and accessories (not handbags or shoes, which have their own tables)
shoes	Footwear: designer shoes and collectible sneakers
automobilia	Automotive memorabilia, parts, signage, models and related collectibles (not the cars themselves)
books	Books, manuscripts, maps and printed material
coins	Numismatic coin auction results
other_automobile	Other vehicles: boats, tractors, trucks, buses and military vehicles (not cars or motorcycles)
perfume	Perfume and collectible fragrance bottles and flacons
accessories	Fashion accessories: belts, scarves, cufflinks, brooches and sunglasses, including gem-set pieces
musical_instruments	Musical instruments: guitars, violin family, pianos and keyboards, woodwind, brass, percussion and amplifiers

gems vs jewelry: gems holds LOOSE, unmounted stones (the right table for a gemstone valuation); jewelry holds FINISHED, mounted pieces set with stones. If one returns nothing, try the other.

Data sources include Christie's, Sotheby's, Phillips, Bonhams, Artcurial, Dorotheum, Heritage Auctions, and 100+ other auction houses worldwide.

Hosted Server

The hosted server at https://mcp.altfndata.com/mcp (Quick Start 2a) is this package running in HTTP mode. Any MCP client that supports remote servers with OAuth can connect to it; the sign-in page asks for your ALT/FNDATA API key, so no local installation is needed.

Self-Hosting the Remote Server

To run the MCP server in remote (HTTP) mode:

export ALTFINANCE_TRANSPORT=streamable-http
export ALTFINANCE_ISSUER_URL=https://mcp.altfndata.com
export ALTFINANCE_RESOURCE_URL=https://mcp.altfndata.com
python -m altfinance_mcp

Or with Docker:

docker build -t altfinance-mcp .
docker run -p 8000:8000 \
  -e ALTFINANCE_TRANSPORT=streamable-http \
  -e ALTFINANCE_ISSUER_URL=https://mcp.altfndata.com \
  -e ALTFINANCE_RESOURCE_URL=https://mcp.altfndata.com \
  altfinance-mcp

The remote server exposes:

• POST/GET/DELETE /mcp — MCP Streamable HTTP endpoint (authenticated)
• GET /.well-known/oauth-authorization-server — OAuth metadata
• POST /register — Dynamic Client Registration
• GET /authorize — OAuth authorization
• POST /token — Token exchange
• GET/POST /login — API key entry form

Environment Variables

Local (stdio) mode

Variable	Required	Default	Description
ALTFINANCE_API_KEY	Yes	—	Your ALT/FNDATA API key
ALTFINANCE_API_URL	No	https://api.altfndata.com	API base URL

Remote (HTTP) mode

Variable	Required	Default	Description
ALTFINANCE_TRANSPORT	Yes	stdio	Set to streamable-http
ALTFINANCE_API_URL	No	https://api.altfndata.com	API base URL
ALTFINANCE_HOST	No	0.0.0.0	HTTP listen address
ALTFINANCE_PORT	No	8000	HTTP listen port
ALTFINANCE_ISSUER_URL	No	http://localhost:8000	OAuth issuer URL (your public URL)
ALTFINANCE_RESOURCE_URL	No	Same as issuer	OAuth resource server URL

Privacy Policy

This MCP server connects to the ALT/FNDATA API (api.altfndata.com) to retrieve auction data. The following outlines our data practices:

• Data collection: The server sends your API key and query parameters (table names, filters, sort options) to the ALT/FNDATA API. No personal user data is collected beyond what is required for API authentication and query execution.
• Usage and storage: Query data is processed in real-time and returned to the MCP client. The server does not persist, cache, or store any query results or user data locally.
• Third-party sharing: Data is exchanged only between the MCP client and the ALT/FNDATA API (api.altfndata.com). No data is shared with any other third parties.
• Data retention: The server is stateless. No user data or query history is retained after a session ends.
• Contact: For privacy inquiries, contact support@altfndata.com.

Full privacy policy: https://altfndata.com/privacy-policy/

Support

• Documentation: https://docs.altfndata.com
• Email: support@altfndata.com

Requirements

• Python 3.10+
• An ALT/FNDATA API key

License

MIT