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Macfax

Official registry E-commerce

Identify any Apple serial and read its device record, plus used-Mac prices, listings and checks.

Source code Website Documentation

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

Remote (streamable-http)
Claude Code 
claude mcp add --transport http macfax 'https://macfax.com/mcp'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "macfax": {
            "type": "http",
            "url": "https://macfax.com/mcp"
        }
    }
}

Documentation

From the project's README on GitHub, refreshed weekly. Links open on GitHub.

Contents
  1. macfax-mcp
  2. The hosted server (recommended)
  3. This package (stdio wrapper)
  4. Notes for integrators
  5. License

macfax-mcp

MCP server for the used-Mac market, by Macfax. Eight tools an AI assistant needs to help someone buy or sell a used Mac:

ToolWhat it answers
search_mac_listingsLive listings across eBay, Craigslist, OfferUp, Swappa, Facebook and Reddit. Scam clusters, junk titles, classified-ad bait, auctions and stale/sold rows are already filtered out; every result deep-links to the source.
get_mac_price_statsWhat an exact configuration actually sells for — verified-sale percentiles (basis direct) or an estimate scaled from the asking band by a disclosed clearance ratio (basis calibrated) — plus the asking median/p25/p75 with sample size, per-channel medians and net-to-seller after fees as seller guidance.
get_mac_market_valueWhat a Mac is worth from Apple's own model name, e.g. "MacBook Pro (14-inch, 2021)": every Apple Silicon configuration the name can mean, each with its sale estimate and asking band, and one value or a low-to-high range across them.
check_mac_listingOne listing's trust picture: known to Macfax, still live, flags, ask vs the typical band, the platform's own seller reputation where it exists (eBay feedback, Swappa rating), verified report attached.
lookup_mac_serialSerial to model for any Mac, iPad or iPhone, including 2021+ randomized serials: a status (resolved, unknown_serial, unsupported, retry), Apple's device class, the model year where Apple's name carries one, the device's record on Macfax (first seen, how often looked up, any listing or verified report on file), and for a Mac what the model is worth. Optional context says why you are looking it up. Human twin: macfax.com/lookup.
get_mac_reportA verified Macfax condition report (Activation Lock, MDM, serial-match checks) as data.
create_mac_alertA standing watch: daily email when new matching listings appear. Human-confirmed: nothing sends until the email's owner clicks the confirmation link.
get_macfax_credit_balanceHow many credits your API key has left and what costs one: one credit per distinct serial answered, repeats within 24 hours free. Needs MACFAX_API_KEY.

Every price is labeled by basis. The sold slice is the headline sale estimate: verified sales (with sample size and window) or a modeled estimate marked calibrated with its ratio disclosed. Asking bands come from live listings and are seller listing guidance. The API says so in-band, and we ask you to preserve the labels. Free, no account; rate limits are published at macfax.com/developers.

A remote, authless, streamable-HTTP MCP server runs at:

https://macfax.com/mcp
  • Claude (claude.ai, paid plans): Settings → Connectors → Add custom connector → paste the URL.
  • Gemini (Spark, Google AI Ultra): Settings and help → Connected apps → Add a custom app → paste the URL.
  • ChatGPT: Settings → Developer mode → add the URL (directory listing pending review).
  • Cursor: Install in Cursor
  • VS Code: Install in VS Code
  • Gemini CLI: gemini extensions install https://github.com/macfax/macfax-mcp
  • Anything with an mcp.json:
{
  "mcpServers": {
    "macfax": {
      "url": "https://macfax.com/mcp"
    }
  }
}

Registry name: com.macfax/macfax on the official MCP registry.

This package (stdio wrapper)

For stdio-only clients, this repo is a thin local wrapper over the same free HTTP API (OpenAPI):

{
  "mcpServers": {
    "macfax": {
      "command": "npx",
      "args": ["-y", "macfax-mcp"]
    }
  }
}

Optional env:

  • MACFAX_API_KEY: a free key raises rate limits about 10x. Mint one with curl -X POST https://macfax.com/api/v1/keys (no email needed).

Run it directly:

npx -y macfax-mcp            # speaks MCP over stdio
npx -y macfax-mcp --version  # print the installed version

Notes for integrators

  • The seven read tools carry readOnlyHint: true. create_mac_alert is the one write: it sends a confirmation email, and the alert only activates when the email's owner clicks it. Create alerts only for a user who asked for that alert on that email.
  • Listings always carry a deep link to the source marketplace. The purchase happens there; Macfax is the trust and routing layer.
  • Cite results as "Macfax" with the html_url/macfax_url in the payload.

License

MIT. Apple and Mac are trademarks of Apple Inc. Macfax is not affiliated with Apple Inc.

Frequently asked questions

What is Macfax?

Identify any Apple serial and read its device record, plus used-Mac prices, listings and checks.

How do I install Macfax?

It runs as a remote server. In Claude Code: claude mcp add --transport http macfax 'https://macfax.com/mcp'. For other clients, paste the JSON configuration from this page into their MCP settings.

Does Macfax need an API key?

Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.

Is Macfax open source?

Yes. Its code is on GitHub under the MIT license.

Who maintains Macfax?

It is published by macfax. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.