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crypto-transactions-mcp

by bolesk

crypto-transactions-mcp

MCPサーバーで、暗号通貨市場で実行された取引と注文を追跡します。 LLMエージェント(Claude、agyなど)が、正確なDecimal精度でトレード、スワップ、転送を記録し、履歴を照会できるようにするMCPツールを公開します。永続化はローカルのJSONファイルまたはNotionデータベースに交換可能です。

クイックスタート

  1. uv sync で依存関係をインストールします。

  2. バックエンドを選択します:

  3. MCPホストの設定にサーバーを追加します: 「Claude Desktopの設定」または「agyの設定」を参照してください。

  4. ホストを再起動して、例えば次のように試してください: "Binanceで0.1 BTCを65000 USDTで購入、手数料0.0001 BTC、log_transactionで記録して。"

オニオンアーキテクチャ:

  • domain/ — エンティティ CryptoTransaction (Pydantic v2、金額フィールドは Decimal)。sideBUY/SELL (トレード、crypto/cryptoスワップを含む) または TRANSFER (同じアセットを2つの保管場所間で移動)。2つのケースはモデル自体で検証される異なる要件を持つ (BUY/SELLは price/value が必要、TRANSFERは to_exchange が必要)

  • interfaces/ — ポート TransactionRepositoryTransactionFilters

  • usecases/LogTransactionUseCase (トレード、部分マージによるupsert)、LogTransferUseCase (トランスファー、upsertと同じセマンティクス)、GetTransactionHistoryUseCase

  • infrastructure/ — ポート TransactionRepository の具体的なアダプター:

    • JsonTransactionRepository、ローカルJSONファイル、固定パス data/crypto_transactions.json

    • NotionTransactionRepository、Notionデータベース (下記参照)

  • delivery/ — サーバー FastMCP、MCPツール (log_transaction, log_transfer, get_transaction_history)、factories.py での依存関係の配線

Related MCP server: Expense Tracker MCP Server

MCPツール

  • log_transaction — BUY/SELLトレード、2つのcrypto間のスワップ (例: ETH/BTC) を含む: 通常のトレードと同じ形式で、別のツールは不要。オプションの fiat_value/fiat_currency をサポートし、交換時点のフィアット換算額を固定できる — crypto/cryptoスワップでは、price (2つのcrypto間の相対レート) だけでは後から実現損益や受け取った新しいアセットのフィアット原価を計算できないため、強く推奨される。

  • log_transfer — 同じアセットを2つの保管場所間で移動 (exchangeto_exchange)、トレードではない: side/price は不要だが、to_exchange が必要。

  • get_transaction_history — 両方の履歴、オプションのフィルター (symbol, exchange, side"TRANSFER" を含む, date_from/date_to)、日付降順 (新しい順) で並べ替え、ページネーション (limit デフォルト50, offset); レスポンスは {"transactions": [...], "has_more": bool}

  • get_portfolio_summary — 各アセット (vs_currency 自体を除く) について: 保有量、総投資額、1単位あたりの平均投資額 (原価)、時価評価額、未実現損益。オプションの as_of_date でライブではなく過去の日付の状況 (過去価格) を取得可能 — 税務申告用に設計。cost_basis_method (weighted_average または fifo) は明示的な選択であり、自動ではない: 同じ履歴でも異なるキャピタルゲインを生む可能性があるため、どちらが必要か税理士に確認してください。

  • get_asset_price — 単一アセットの現在または指定日の過去の価格を取得。ポートフォリオ全体を計算せずに。

セットアップ

uv sync

.env.example.env にコピーして値を設定します: 起動時に自動的に読み込まれます (main.pyload_dotenv() を呼び出します)。これはサーバーが外部ホスト (Claude Desktop、agy、...) から uv run --directory <path> main.py で起動される場合でも機能します。--directory がプロセスの作業ディレクトリをプロジェクトのルートに設定し、load_dotenv() がデフォルトで .env を探すためです — ホストの設定JSONにシークレットを複製する必要はありません。多くの場合、ローカルのgitignoreされた .env よりも保護が弱いためです。

永続化バックエンド

環境変数 TRANSACTION_REPOSITORY_BACKEND で選択できます:

  • json (デフォルト) — 追加設定は不要。

  • notionNOTION_TOKEN (Notionインテグレーションのトークン) と NOTION_DATABASE_ID が必要。

Notionをゼロからセットアップ

このプロジェクトに接続されたNotionインテグレーションがまだない場合は、次の手順を順に実行してください (ワークスペースでインテグレーションを作成する権限を持つNotionアカウントが必要です):

  1. インテグレーションを作成notion.so/my-integrations にアクセス → "+ New integration" → 名前を付ける (例: "Crypto Transactions MCP") → ワークスペースを選択 → タイプ "Internal"。

  2. ケイパビリティを有効化 — インテグレーションの設定ページで、"Capabilities" の下にある Read contentUpdate contentInsert content を有効にします。

  3. トークンをコピー — "Secrets" タブ → "Internal Integration Secret" の値をコピー (先頭は secret_ または ntn_)。これがあなたの NOTION_TOKEN です。

  4. データベースを作成 — Notionで新しいデータベース (フルページまたはインライン) を作成し、下の表にリストされているプロパティと正確に一致するように設定します。Notionがデフォルトで作成する "title" 列 (通常 "Name") は Transaction ID に名前を変更する必要があります: 各Notionデータベースには必須で1つあり、これはデータベース名ではなく各行を識別する列です。

  5. データベースをインテグレーションと共有 — データベースのページを開く → 右上の "..." メニュー → "Connections" → 手順1で作成したインテグレーションを検索して接続。この手順を省略すると、有効なトークンでもAPIは404を返します。Notionの権限はワークスペース全体ではなくページ単位であるためです。

  6. データベースIDを見つける — データベースページのURLにあります: https://www.notion.so/<ID-senza-trattini>?v=...。例えば、https://www.notion.so/abcdef0123456789abcdef0123456789?v=... からIDは abcdef0123456789abcdef0123456789 です。これがあなたの NOTION_DATABASE_ID です。

  7. 変数を設定 — あなたの .env (上記参照)、またはMCPホストの env ブロックで:

TRANSACTION_REPOSITORY_BACKEND=notion
NOTION_TOKEN=<il secret del punto 3>
NOTION_DATABASE_ID=<l'id del punto 6>

Notionデータベースには次のプロパティが必要です (正確な名前とタイプ):

Property

タイプ

Transaction ID

title

Tx Hash

rich_text

Exchange

select

To Exchange

select

Symbol

select

Side

select (BUY, SELL, TRANSFER)

Timestamp

date (時刻付き、UTC)

Amount

number

Price

number

Value

number

Fee Amount

number

Fee Asset

select

Fiat Value

number

Fiat Currency

select

Notes

rich_text

To ExchangePriceValueFiat ValueFiat Currency は空にできます (TRANSFER には適用されない、またはトレードではオプション)。

注: Notionの数値フィールドはネイティブの number (float64) であり、JSONバックエンドのような正確な Decimal ではありません — 実際の取引金額には十分ですが、倍精度浮動小数点の精度限界の影響を受けます。

テスト

uv run pytest

手動実行

uv run main.py

Claude Desktopの設定

claude_desktop_config.json ファイルに追加します (macOS: ~/Library/Application Support/Claude/claude_desktop_config.json)。プロジェクトのルートに .env が設定済みなら (上記参照) これだけで十分で、JSONにシークレットは不要です:

{
  "mcpServers": {
    "crypto-transactions": {
      "command": "uv",
      "args": [
        "run",
        "--directory",
        "/path/to/crypto-transactions-mcp",
        "main.py"
      ]
    }
  }
}

あるいは、.env ファイルを使いたくない場合は、env ブロックで直接変数を渡すこともできます (両方存在する場合は .env の値を上書きします):

{
  "mcpServers": {
    "crypto-transactions": {
      "command": "uv",
      "args": [
        "run",
        "--directory",
        "/path/to/crypto-transactions-mcp",
        "main.py"
      ],
      "env": {
        "TRANSACTION_REPOSITORY_BACKEND": "notion",
        "NOTION_TOKEN": "secret_...",
        "NOTION_DATABASE_ID": "abcdef0123456789abcdef0123456789"
      }
    }
  }
}

agyの設定

同じ mcpServers スキーマですが、agyを使用するプロジェクトのルートにある .agents/mcp_config.json ファイル内です (既存の他のサーバーを削除せずに、crypto-transactions エントリを追加します)。同じことが当てはまります: .env が設定されていれば env ブロックは不要です:

{
  "mcpServers": {
    "crypto-transactions": {
      "command": "uv",
      "args": [
        "run",
        "--directory",
        "/path/to/crypto-transactions-mcp",
        "main.py"
      ]
    }
  }
}

Available Tools

3 tools
get_transaction_historyA

Restituisce lo storico delle transazioni salvate (trade e transfer), filtrato opzionalmente per symbol, exchange, side (usa "TRANSFER" per i soli transfer) e/o intervallo di date (date_from/date_to, inclusivi, in UTC).

ParametersJSON Schema
NameRequiredDescriptionDefault
sideNo
symbolNo
date_toNo
exchangeNo
date_fromNo

Output Schema

ParametersJSON Schema
NameRequiredDescription
resultYes

TDQS

A3.5/5.0
Behavior3/5

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

No annotations are provided, so the description carries the full burden. It states the action is read-only ('Restituisce') and specifies that date filters are inclusive and in UTC. However, it does not disclose other behavioral traits such as response format, pagination, or any side effects. The description is minimally adequate.

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 sentence that is front-loaded with the main action and then details parameters. It is concise but could be restructured for easier scanning (e.g., bullet points). However, it contains no unnecessary words and effectively communicates the tool's purpose and filters.

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?

An output schema exists (assumed but not shown), so explanation of return values is not required. The description covers filtering options and date inclusivity/UTC zone. However, it lacks information on default behavior (e.g., returns all history if no filters), pagination, or response limits. For a history retrieval tool, this is acceptable but not fully complete.

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?

Schema description coverage is 0%, but the description adds meaningful context: it explains the side parameter can use 'TRANSFER' to filter only transfers, and notes that date filters are inclusive and in UTC. This adds semantic value beyond the schema's property names and types. It could further describe parameter formats or constraints.

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 it returns saved transaction history (trades and transfers) with optional filtering. The verb 'Restituisce' and resource 'storico delle transazioni' are specific. Sibling tools (log_transaction, log_transfer) are for creation, so the read purpose is distinguishable, though not explicitly contrasted.

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

Usage Guidelines3/5

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

Implied usage: use when you need to retrieve transaction history. The description lists available filters but does not provide explicit guidance on when to use this tool versus siblings or when not to use it. No alternatives or exclusions are mentioned.

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

log_transactionA

Registra un trade (BUY/SELL, incluso uno swap tra due crypto), upsert per id.

    Trade normale (es. BTC/USDT): symbol è la coppia BASE/QUOTE,
    side=BUY se acquisti il base, side=SELL se lo cedi; price è il
    prezzo unitario del base in quote.

    Swap crypto/crypto (es. scambio ETH -> BTC su un DEX o un exchange):
    si usa questo stesso tool, non ce n'è uno dedicato. Metti come base
    l'asset ceduto e come quote quello ricevuto, es. symbol="ETH/BTC",
    side="SELL", amount=1 (ETH ceduti), price=0.05 (BTC ricevuti per
    ETH). Attenzione: in questo caso price ti dice solo il cambio tra
    le due crypto, non il loro controvalore in una valuta fiat — senza
    quel dato non potrai più calcolare a posteriori né il P&L realizzato
    sull'asset ceduto né il cost-basis fiat del nuovo asset ricevuto.
    Per questo, quando disponibile, valorizza sempre fiat_value (il
    controvalore totale dello scambio, es. in EUR al momento
    dell'esecuzione) e fiat_currency: è fortemente consigliato per gli
    swap crypto/crypto, utile anche per i trade con quote fiat/stablecoin.

    Se `id` è omesso viene generata una nuova transazione con un id
    generato automaticamente. Se `id` corrisponde a una transazione già
    salvata, solo i campi passati vengono aggiornati (merge parziale);
    `value` viene ricalcolato come amount * price se non fornito
    esplicitamente e uno tra amount/price cambia. Per una nuova
    transazione sono richiesti tutti i campi obbligatori dello schema
    (exchange, symbol, side, timestamp, amount, price, fee_amount,
    fee_asset). `tx_hash` è opzionale, usalo per l'hash on-chain quando
    disponibile (tipico per gli swap su DEX).

    Per spostare lo stesso asset tra due exchange/wallet, senza
    scambiarlo con un altro asset, usa invece il tool log_transfer.
    
ParametersJSON Schema
NameRequiredDescriptionDefault
idNo
sideNo
notesNo
priceNo
valueNo
amountNo
symbolNo
tx_hashNo
exchangeNo
fee_assetNo
timestampNo
fee_amountNo
fiat_valueNo
fiat_currencyNo

TDQS

A4.6/5.0
Behavior5/5

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

Discloses key behavioral traits: upsert behavior (merge partial update when id matches), auto-generation of id for new transactions, recalculation of value based on amount*price, required fields for new transactions, and the optional use of tx_hash. No annotations are provided, so the description fully compensates.

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

Conciseness3/5

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

The description is relatively long but well-structured with paragraphs separating normal trades, swaps, upsert behavior, and required fields. It is front-loaded with the main purpose. However, some content could be condensed, making it less concise than optimal.

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

Completeness4/5

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

Given the complexity (14 parameters, upsert behavior, swap handling) and the absence of an output schema, the description covers most behavioral aspects thoroughly. It mentions sibling tools for disambiguation. It does not explain the return value of the tool, which is a minor gap.

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?

With 0% schema description coverage, the description explains the meanings of several key parameters (side, symbol, price, amount, fiat_value, fiat_currency, id, tx_hash, value). It does not explicitly cover all 14 parameters (e.g., notes, timestamp, exchange, fee_amount, fee_asset are mentioned as required but not detailed). The coverage is extensive enough to guide an agent, though not exhaustive.

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

Purpose5/5

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

The description clearly defines the tool as recording a trade (BUY/SELL, including swaps) and differentiates it from the sibling log_transfer tool, specifying which tool to use for asset transfers without exchange. The verb 'Registra' and the resource 'trade' are specific and unambiguous.

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

Usage Guidelines5/5

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

Provides explicit guidance on when to use this tool vs the sibling log_transfer: 'Per spostare lo stesso asset tra due exchange/wallet, senza scambiarlo con un altro asset, usa invece il tool log_transfer.' Also explains how to handle crypto/crypto swaps, including the recommendation to provide fiat_value and fiat_currency for better P&L calculation.

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

log_transferA

Registra il movimento dello stesso asset tra due custodie (exchange o wallet), upsert per id. Non è un trade: non c'è side né un prezzo di scambio, quindi non usare questo tool per uno swap tra due asset diversi (per quello usa log_transaction).

    `exchange` è l'origine, `to_exchange` la destinazione. `symbol` è
    il solo asset spostato (es. "BTC"), non una coppia. `fee_amount`/
    `fee_asset` rappresentano la fee di rete del trasferimento, non una
    commissione di trading. `tx_hash` è fortemente consigliato quando
    disponibile (tipico per i prelievi/depositi on-chain). `fiat_value`/
    `fiat_currency` sono opzionali, per tracciare il controvalore fiat
    dell'importo spostato al momento del trasferimento.

    Se `id` è omesso viene generato automaticamente. Se `id`
    corrisponde a un transfer già salvato, solo i campi passati vengono
    aggiornati (merge parziale). Per un nuovo transfer sono richiesti
    exchange, to_exchange, symbol, timestamp, amount, fee_amount,
    fee_asset.
    
ParametersJSON Schema
NameRequiredDescriptionDefault
idNo
notesNo
amountNo
symbolNo
tx_hashNo
exchangeNo
fee_assetNo
timestampNo
fee_amountNo
fiat_valueNo
to_exchangeNo
fiat_currencyNo

TDQS

A4.5/5.0
Behavior4/5

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

With no annotations, the description carries full burden. It explains upsert behavior (auto-generated ID, partial merge for existing records), required fields for new transfers, and the nature of fees (network fee, not trading commission). However, it does not explicitly address side effects like idempotency or potential data loss, slightly reducing completeness.

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 front-loaded with the core purpose and distinction, followed by parameter details and behavior. It is slightly verbose but every part adds value. No redundant sentences, but could be tightened slightly.

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

Completeness4/5

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

Given 12 parameters, upsert behavior, and no output schema, the description covers most essential aspects: both usage scenarios, parameter meanings, create vs. update behavior, and required fields. It doesn't describe the return value, but that's minor. Overall, it provides sufficient context for an agent to use the tool correctly.

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?

Schema description coverage is 0%, so description must compensate. It explains key parameters: exchange (origin), to_exchange (destination), symbol (single asset), fee_amount/fee_asset (network fee), tx_hash (recommended), fiat_value/fiat_currency (optional). However, the 'notes' parameter is not mentioned, and 'amount' is implied but not explicitly defined, leaving a minor gap.

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

Purpose5/5

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

The description explicitly states the tool logs asset movement between two custodians, uses 'upsert per id', and distinguishes it from a trade by noting no side or price. It also names the sibling tool log_transaction for swaps between different assets, making the purpose unmistakable.

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

Usage Guidelines5/5

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

The description clearly says when to use (same-asset transfer between custodians) and when not to (different-asset swap, directing to log_transaction). It also advises using tx_hash for on-chain transfers, providing practical guidance.

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.

  1. 3 tool updatesv0.1.0
    • First observedget_transaction_history
    • First observedlog_transaction
    • First observedlog_transfer

TDQS

A4.1/5.0

Scored across 3 tools

Disambiguation5/5

Each tool has a distinct and clear purpose: one for querying history, one for logging trades/swaps, and one for logging asset transfers. There is no overlap in functionality.

Naming Consistency5/5

All tool names follow a consistent verb_noun pattern with lowercase and underscores: get_transaction_history, log_transaction, log_transfer. This is predictable and easy to understand.

Tool Count4/5

With only 3 tools, the set is minimal but covers the core actions of reading and writing transactions and transfers. It feels slightly thin but is still well-scoped for a focused server.

Completeness4/5

The server covers basic CRUD operations for transactions and transfers, including upsert and filtering. Missing a dedicated tool for single transaction retrieval or deletion, but the existing tools can accommodate those needs.

Maintenance

ActivityMaintained
ResponsivenessNo issues

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