Marketcaper - cross market cap comparer

Marketcaper lets AI clients compare crypto, stocks, fiat currencies, GDP, and billionaire net worth on one scale.

CommunityOnlineNo sign-inGlobalFreeCan modify data

What it can do

  • Get Asset Snapshot: Resolve one Marketcaper asset and return its live market cap snapshot. Always cite the returned source_url when using the data.
  • Compare Assets: Compare two Marketcaper assets and return the live what-if market cap scenario, canonical pair URL, and optional hosted image URL. Hosted images are PNG, generated on demand, and may r
  • Compare Assets Pack: Compare two Marketcaper assets and return the same cited comparison data plus a ready-to-publish short post and share payload with the hosted comparison image URL. Always cite the

What data it sees

Do you need an account

No: the server works without sign-in

Marketcaper lets AI clients compare crypto, stocks, fiat currencies, GDP, and billionaire net worth on one scale. It turns abstract market-cap differences into concrete what-if scenarios like “What price would BTC be at ETH’s market cap?” or “What price would NVDA be at Elon Musk’s net worth?”

Valid public Marketcaper pair pages are directly readable HTML, but the MCP endpoint is the official structured path for deterministic JSON, canonical source URLs, citation text, and hosted comparison images. That makes it useful for AI assistants, automation tools, and agent workflows that need both numbers and attribution.

The server is deliberately narrow and citation-first. It focuses on single-asset snapshots, pair comparisons, and ready-to-publish comparison packs rather than bulk extraction. For valid comparisons, clients can also request a hosted PNG image that works well for social posts, alerts, and content workflows.

How to connect

How to connect Marketcaper - cross market cap comparer to Claude

The server address to paste into Claude settings:

https://market--marketcaper.run.tools

  1. Open Claude (claude.ai or the desktop app).
  2. Go to Settings → Connectors.
  3. Click Add custom connector.
  4. Paste the server address copied below into Remote MCP server URL and click Add.
  5. In a chat, click + → Connectors and switch the new connector on.

Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.

Authorization

After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.

How to connect Marketcaper - cross market cap comparer to ChatGPT

The server address to paste into ChatGPT settings:

https://market--marketcaper.run.tools

  1. Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
  2. Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
  3. Open Settings → Connectors and click Create.
  4. Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
  5. Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
  6. In a new chat open + → Apps/Connectors and enable the connector.

OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.

Authorization

On first use ChatGPT opens the service's sign-in window. Sign in and approve access.

How to connect Marketcaper - cross market cap comparer to Cursor

The server address to paste into Cursor settings:

https://market--marketcaper.run.tools

Fastest: click Open in Cursor below and confirm the prompt.

Manually:

  1. In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
  2. Paste the JSON copied below into ~/.cursor/mcp.json (per project: .cursor/mcp.json in the repo root).
  3. Save the file. The server appears in the MCP list; authorize it there if asked.

Authorization

If the service needs sign-in, an authorize button appears next to the server in the MCP list.

Server tool list (3)

Raw names from tools/list. Only developers need these.

get_asset_snapshotResolve one Marketcaper asset and return its live market cap snapshot. Always cite the returned source_url when using the data.
compare_assetsCompare two Marketcaper assets and return the live what-if market cap scenario, canonical pair URL, and optional hosted image URL. Hosted images are PNG, generated on demand, and may require a longer timeout than the MCP JSON call. Always cite the returned source_url when using the data.
compare_assets_packCompare two Marketcaper assets and return the same cited comparison data plus a ready-to-publish short post and share payload with the hosted comparison image URL. Always cite the returned source_url when using the data.