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Coincap MCP

by QuantGeekDev

Queries CoinCap for cryptocurrency prices and asset listings through MCP without requiring an API key.

InstallRepository
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Install Coincap MCP

Pick your client, then add it in one click or paste the config.

STDIONode.js
~/Library/Application Support/Claude/claude_desktop_config.json
claude_desktop_config.json
{
  "mcpServers": {
    "quantgeekdev-coincap-mcp": {
      "command": "npx",
      "args": [
        "coincap-mcp"
      ]
    }
  }
}

Settings → Developer → Edit Config, merge this into mcpServers, then fully quit and reopen Claude Desktop.

We couldn’t confirm it starts correctly

The install command started, but didn't respond the way we expected when we tried to talk to it.

npx coincap-mcp

initialize succeeded but no response to tools/list.

This is an experimental automated check and can have false negatives — missing environment variables, a slow cold install, etc. It doesn’t necessarily mean something’s wrong. Last checked 1mo ago.

Overview

QuantGeekDev/coincap-mcp MCP server connects MCP clients to CoinCap’s public cryptocurrency API. It provides Bitcoin and general crypto price lookups plus a list of available assets, with no API key or registration required. Use it when an agent needs current CoinCap market data and can run a local Node.js-based MCP process.

Use cases

  • Check Bitcoin prices
  • Retrieve prices for supported cryptocurrencies
  • List assets available from CoinCap
  • Answer basic crypto market-data questions

Key features

  • Bitcoin-specific price lookup
  • Price lookup for supported cryptocurrencies
  • CoinCap asset listing
  • Public API access without credentials
  • Local Node.js MCP runtime

Security & health

What it can reach and how reliably it runs — from our own checks, not the maintainer’s claims.

ActiveLast checked 1d ago

Recent health check succeeded.

11/14 checks healthy over the last 78d

Supply-chain signal

No high-severity advisories surfaced by our automated scan.

Critical 0High 0Medium 0Low 0

Scanned 6d ago via OSV.dev · coincap-mcp (npm)

Adoption & maintenance

Factual signals from GitHub, npm, and our automated checks — not a rating.

GitHub stars92Stargazers on the source repository.
npm downloads249Package downloads in the last 30 days.
Last commit1y agoMost recent push to the default branch.
Install checkInconclusiveStarted but did not complete the MCP handshake in our test.
Directory activity6 viewsConfig copies, upvotes, and views on AllMCPs.

How Coincap MCP works

What the QuantGeekDev/coincap-mcp MCP server does

The QuantGeekDev/coincap-mcp MCP server exposes selected CoinCap cryptocurrency data through MCP tools. It is designed for agents that need to answer questions about crypto prices or discover which assets are available from CoinCap.

The included capabilities cover three use cases:

  • Looking up Bitcoin’s price with a dedicated Bitcoin-focused tool.
  • Retrieving the price of another cryptocurrency supported by CoinCap.
  • Listing the crypto assets available through the CoinCap API.

The repository description also identifies the integration as a source of market information, and the README uses price, asset availability, and market-cap questions as example prompts.

How it works

The process runs locally and sends requests to CoinCap’s public API. No API key, account registration, or credential configuration is described as necessary. An MCP-compatible client starts the process, discovers its tools, and passes requests from the agent to the relevant CoinCap operation.

The server is implemented as a Node.js project. The documented prerequisites are Node.js 18 or later and npx.

Setup and configuration

To run the QuantGeekDev/coincap-mcp MCP server with Claude Desktop, add an MCP server entry to Claude Desktop’s configuration file. On macOS, the documented location is ~/Library/Application Support/Claude/claude_desktop_config.json; on Windows, it is %APPDATA%/Claude/claude_desktop_config.json.

A direct local configuration uses npx to launch the coincap-mcp package. The repository also documents Smithery as an automated installation option for Claude Desktop, but that installer is separate from the server’s own runtime command.

For local development, install the npm dependencies with npm install, create the build with npm run build, and use npm run watch for automatic rebuilds during development.

Tools and capabilities

The documented tools are:

  • Bitcoin price lookup: Returns the price for Bitcoin through a purpose-built API call.
  • Crypto price lookup: Retrieves the price of a cryptocurrency available from CoinCap.
  • Asset listing: Returns the collection of crypto assets exposed by CoinCap.

These tools support prompts such as asking for Bitcoin’s price, requesting the available crypto assets, or checking information about Ethereum. The material does not specify historical data, trading functions, alerts, portfolio tracking, or write operations.

Limitations and notes

The QuantGeekDev/coincap-mcp MCP server depends on CoinCap’s public API and therefore only exposes information available from that API.

Claude Desktop is the only MCP client explicitly shown in the setup instructions. The project is released under the MIT License.

Read the full README View source on GitHub

Reviews

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Frequently Asked Questions about Coincap MCP

Install Node.js 18+ and use npx to run the coincap-mcp package, or configure the built local entry point in Claude Desktop.

Yes. The README provides Claude Desktop configuration paths and an example MCP server entry for macOS and Windows.

No. It queries CoinCap’s public API without an API key or registration.

It provides a Bitcoin price lookup, prices for supported cryptocurrencies, and a list of assets available through CoinCap.

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