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コインキャップMCP

鍛冶屋のバッジ

このサーバーは何をしますか?

コインキャップのパブリックAPIから暗号通貨情報を照会できます。APIキーや登録は必要ありません。

Related MCP server: CoinCap MCP Server

🚀 クイックスタート

開始するには、次の構成を Claude Desktop 構成ファイルに追加します。

MacOS : ~/Library/Application\ Support/Claude/claude_desktop_config.json
Windows : %APPDATA%/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "mongodb": {
      "command": "npx",
      "args": ["coincap-mcp"]
    }
  }
}

Smithery経由でインストール

Smithery経由で Claude Desktop 用の Coincap を自動的にインストールするには:

npx -y @smithery/cli install coincap-mcp --client claude

前提条件

  • Node.js 18歳以上

  • npx

次に、Claude Desktop を起動すれば準備完了です。

サンプルプロンプト

  • ビットコインの価格はいくらですか?

  • 利用可能な暗号資産は何ですか?

  • イーサリアムの時価総額はいくらですか?

ツール

ビットコイン価格ツール

ビットコインの価格を取得する、これは原始的なAPI呼び出しツールの簡単な例です

暗号通貨価格ツールを入手

CoinCap APIで利用可能なあらゆる暗号通貨の価格を取得します。これは、ツール呼び出しに必要なパラメータデータを取得する方法の良い例です。

資産一覧

CoinCap APIで利用可能なすべての暗号資産のリストを取得します

開発 - ローカルビルド

ローカルでビルドするには:

MacOS の場合: ~/Library/Application Support/Claude/claude_desktop_config.json Windows の場合: %APPDATA%/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "coincap-mcp": {
      "command": "/path/to/coincap-mcp/build/index.js"
    }
  }
}

発達

依存関係をインストールします:

npm install

サーバーを構築します。

npm run build

自動リビルドを使用した開発の場合:

npm run watch

📜 ライセンス

このプロジェクトは MIT ライセンスに基づいてライセンスされています - 詳細についてはLICENSEファイルを参照してください。

Available Tools

3 tools
bitcoin_priceB

Get realtime bitcoin price

ParametersJSON Schema
NameRequiredDescriptionDefault

No parameters

TDQS

B3.2/5.0
Behavior2/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations provided, the description carries full burden for behavioral disclosure. While 'Get realtime bitcoin price' implies a read-only operation, it doesn't specify data source, update frequency, rate limits, authentication requirements, or error conditions. The description is minimal and lacks important behavioral context.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is extremely concise at just three words, front-loaded with the core functionality. Every word earns its place: 'Get' specifies the action, 'realtime' provides important temporal context, and 'bitcoin price' identifies the resource.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a simple price lookup tool with no parameters and no output schema, the description is minimally adequate. However, without annotations and with sibling tools that might overlap in functionality, more context about what makes this tool distinct would be beneficial. The description doesn't specify return format, currency, or data source.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The tool has 0 parameters with 100% schema description coverage, so the baseline is 4. The description appropriately doesn't discuss parameters since none exist, and the empty input schema is correctly documented.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool's purpose with a specific verb ('Get') and resource ('bitcoin price'), and includes the qualifier 'realtime' which distinguishes it from historical or aggregated price tools. However, it doesn't explicitly differentiate from sibling tools like 'get_crypto_price' which might also provide bitcoin prices.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description provides no guidance on when to use this tool versus alternatives like 'get_crypto_price' or 'list_assets'. It doesn't mention any prerequisites, limitations, or specific contexts where this tool is preferred over siblings.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

get_crypto_priceC

Get realtime crypto price on crypto

ParametersJSON Schema
NameRequiredDescriptionDefault
nameNoName of the crypto coin

TDQS

C2.6/5.0
Behavior2/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations are provided, so the description carries full burden. It mentions 'realtime' which hints at freshness, but doesn't disclose behavioral traits like rate limits, data sources, error handling, or what 'realtime' means operationally. It's minimal for a tool with no annotation coverage.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, short sentence that's front-loaded with the core purpose. However, it's slightly redundant ('on crypto') and could be more polished, but it earns its place efficiently.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given no annotations and no output schema, the description is incomplete. It doesn't explain return values, error cases, or operational constraints. For a tool fetching real-time data, more context on behavior and output is needed.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, with the parameter 'name' documented as 'Name of the crypto coin'. The description adds no additional meaning beyond this, such as format examples or valid coin names. Baseline 3 is appropriate since the schema does the heavy lifting.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose3/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description states the tool 'Get realtime crypto price on crypto' which identifies the verb ('get') and resource ('crypto price'), but it's vague about scope and duplicates 'crypto' awkwardly. It doesn't clearly differentiate from sibling tools like 'bitcoin_price' or 'list_assets'.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance is provided on when to use this tool versus alternatives like 'bitcoin_price' (specific to Bitcoin) or 'list_assets' (which might list multiple assets). The description implies real-time pricing but doesn't specify contexts or exclusions.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

list_assetsB

Get all available crypto assets

ParametersJSON Schema
NameRequiredDescriptionDefault

No parameters

TDQS

B3.1/5.0
Behavior2/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations provided, the description carries the full burden of behavioral disclosure. It states 'Get all available crypto assets' but doesn't explain what 'available' means (e.g., supported by the API, currently tradable), whether it's a read-only operation, if there are rate limits, or what the response format looks like. This leaves significant gaps for a tool with zero annotation coverage.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, efficient sentence with no wasted words. It's appropriately sized for a simple tool and front-loads the key information directly.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the tool's simplicity (0 parameters, no output schema, no annotations), the description is minimal. It states what the tool does but lacks context on usage versus siblings, behavioral details like response format or constraints, and doesn't leverage the opportunity to provide more guidance. For a tool in a server with sibling tools, this is inadequate.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The tool has 0 parameters, and the schema description coverage is 100%, so there are no parameters to document. The description doesn't need to add parameter semantics, and a baseline score of 4 is appropriate for a parameterless tool where the schema fully covers the input structure.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the action ('Get') and resource ('all available crypto assets'), providing a specific purpose. However, it doesn't differentiate from sibling tools like 'bitcoin_price' or 'get_crypto_price' which appear to be more specific price-fetching tools, so it doesn't fully distinguish from alternatives.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description provides no guidance on when to use this tool versus the sibling tools ('bitcoin_price' and 'get_crypto_price'). It doesn't specify if this is for listing assets versus getting prices, or any prerequisites or exclusions for usage.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

Tool Schema Changelog

Recent tool additions, removals, and schema changes observed during successful MCP inspections. Dates show when Glama detected each change.

  1. 3 tool updatesv1.0.0
    • Addedbitcoin_price
    • Addedget_crypto_price
    • Addedlist_assets

TDQS

C2.7/5.0
Disambiguation2/5

Two tools (bitcoin_price and get_crypto_price) have overlapping purposes, both focused on fetching crypto prices, which creates ambiguity. The descriptions do not clearly differentiate them, making it likely an agent could misselect between them. The third tool (list_assets) is distinct, but the overlap between the first two significantly reduces clarity.

Naming Consistency3/5

The naming is mixed, with two tools using a verb_noun pattern (get_crypto_price, list_assets) and one using a noun_verb pattern (bitcoin_price). While readable, this inconsistency in verb placement and specificity (bitcoin vs. crypto) deviates from a predictable convention. The patterns are not chaotic but lack uniformity.

Tool Count3/5

With 3 tools, the count is borderline thin for a crypto data server, as it may lack comprehensive coverage for common operations like historical data or multiple asset queries. However, it is reasonable for a minimal or focused scope, though it feels slightly under-scoped for typical crypto API use cases.

Completeness2/5

The tool set has significant gaps for a crypto data domain, such as missing operations for historical price data, market cap info, volume, or specific asset details beyond listing. The overlap in price tools does not add functionality, and agents may struggle with incomplete workflows like tracking trends or comparing assets over time.

Maintenance

ActivityInactive
ResponsivenessSyncing

Resources

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