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Marketcaper MCP server

Which MCP servers are Marketcaper's own, from the official registry and from asking its own domain, whether they answer, and what they offer. A program checked each of these, nobody copied them from a product page.

read 2026-10-21

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Whose server it is
  • Registry namecom.marketcaper/mcpverified in the MCP registry

The registry name sits under marketcaper.com. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

When we asked itchecked 2026-10-21
  • Stateanswerschecked 2026-10-21
  • Tools4
  • Server calls itselfmarketcaper-mcp
  • Server version1.4.0
  • Protocol version2025-06-18

On 2026-10-21 the server answered initialize and tools/list without a sign-in. First answer in 514 ms.

Should an agent connect itConnect it
  • Its tools do every use case we checked: compare market caps of two assets side by side; view relative size of stocks, crypto, funds, and GDP.

Once connected

  • For "compare market caps of two assets side by side", the likely first call is compare_assets.
  • For "view relative size of stocks, crypto, funds, and GDP", the likely first call is compare_assets.

Said by rules from the measurements above. The likely first call is a model's pick from the tool list; read its description before relying on it.

Measured dailydaily checks: 13, the first on 2026-10-21
  • INITE MCP score100 of 100answers 100 · does the job 100 · definitions 100 · context 100 · connects 100
  • What an agent can do with it2 of 2 use cases
  • Answered100% of days13 of 13 daily checks
  • Median first answer535 ms
  • Space in an agent's context≈ 1,098 tokensthe definitions of all its tools (4), which an agent carries on every turn
  • Tool definitionsA · 100 of 100
  • Typed results0 of 4 toolsdeclared outputSchema: results come typed, read once
  • Every tool passes all six checks.

What an agent can do with it

  • can do · compare market caps of two assets side by side
  • can do · view relative size of stocks, crypto, funds, and GDP
  • not sure · check hypothetical prices for supported price-based comparisons

Each of the product's use cases, put to Jev against this server's tool list: can an agent do it with these tools?

Worth a look

None of the five warning signs in these definitions.

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work. The score weighs what was measured and nothing else: answering (25%), doing the product's job (25%), definitions (20%), context (10%), use (10%) and how readily a client connects (10%). A part that was not measured is left out, and a hidden instruction caps the score at 40. The state of vendors' MCP servers: method and numbers →

Tools it offers4 tools · read 2026-10-21
  • get_asset_snapshot

    Resolve one Marketcaper asset and return its reported size snapshot. Check the input observation time and always cite the returned source_url when using the data.

  • compare_assets

    Compare two Marketcaper assets and return relative size or a supported hypothetical price-at-size scenario, the canonical pair URL, and an optional hosted image URL. Hosted images are PNG, generated on demand, share a 10 images/day/IP…

  • compare_assets_pack

    Compare two Marketcaper assets and return the same cited comparison data plus a draft short post for review and share payload with the hosted comparison image URL. Always cite the returned source_url when using the data.

  • get_stock_heatmap

    Return a Marketcaper stock heatmap summary with reported observation and update times, plus a hosted dark-theme PNG image URL. Supports US or global universes, classic or bubble views, optional sector/category filtering, and capped…

How to connect

Add the server to your MCP client config. Claude Desktop, Cursor and most other clients read this shape:

{
  "mcpServers": {
    "marketcaper": {
      "type": "http",
      "url": "https://marketcaper.com/api/mcp"
    }
  }
}

Add it

Claude Code, in a terminal

claude mcp add --transport http marketcaper https://marketcaper.com/api/mcp

Add to CursorAdd to VS Code

claude.ai, ChatGPT and other clients: add https://marketcaper.com/api/mcp as a custom connector in the settings.

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.