# CrossFin (npm · crossfin-mcp)

AI agent access to Asian crypto markets. Korean exchange routing and x402 paid APIs.

- Trust score: 60/100 (medium)
- Change this week: +14
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-03

## Components

- remote · `crossfin.dev`: 58/100, [markdown](https://verifymcp.io/servers/bubilife1202-crossfin/api-mcp.md), [page](https://verifymcp.io/servers/bubilife1202-crossfin/api-mcp)
- npm · `crossfin-mcp`: 60/100 (this document), [markdown](https://verifymcp.io/servers/bubilife1202-crossfin/crossfin-mcp.md), [page](https://verifymcp.io/servers/bubilife1202-crossfin/crossfin-mcp)

## Channel facts

- Registry: `npm`
- Package: `crossfin-mcp`
- Version: `1.18.0`
- Transport: `stdio`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-08-03.

- **Supply Chain Security**: 87/100
  - No malware found by supply-chain analysis.
  - Only part of the dependency tree could be resolved (113 of 117), so this covers what we could see, not the whole tree.
  - No install/post-install scripts declared.
  - Only part of the dependency tree could be resolved (113 of 117), so this covers what we could see, not the whole tree.
- **Provenance & Transparency**: 32/100
  - Source repository is publicly reachable at the declared URL.
  - Provenance check failed: no build-provenance attestation is published.
  - License check failed: the license (UNLICENSED) isn't a recognized OSI-approved license.
  - Actively maintained (last published 158 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 64/100
  - AI-judged instruction clarity (good).
  - Tool/resource definitions use about 949 tokens (~59/item across 16 items; 16 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 0/100
  - Stability not yet verified: not enough scan history yet (needs a 30-day window).
- **Tool Coverage**: 95/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 83% of tool parameters carry a description.
  - Structured output schemas are declared (25% of tools); any adoption earns full credit.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

**Unverified: 1 category.** A category scored 0 because we could not verify it: a data source with nothing on this package, evidence we could not reach, or a check we could not run. We only credit what we can confirm.

## Install

### Claude

```bash
claude mcp add bubilife1202-crossfin -- npx -y crossfin-mcp
```

### Codex

```bash
codex mcp add bubilife1202-crossfin -- npx -y crossfin-mcp
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "bubilife1202-crossfin": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "crossfin-mcp"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add bubilife1202-crossfin --command npx --arg -y --arg crossfin-mcp
```

### Hermes

```yaml
mcp_servers:
  bubilife1202-crossfin:
    command: "npx"
    args: ["-y", "crossfin-mcp"]
```

### Other

```json
{
  "mcpServers": {
    "bubilife1202-crossfin": {
      "command": "npx",
      "args": [
        "-y",
        "crossfin-mcp"
      ]
    }
  }
}
```

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-08-02 (score 60, +39)

- [security regression] Provenance: unverified → fail
- [security improvement] Known CVEs: unverified → partial
- [security improvement] Install scripts: unverified → pass
- [security improvement] Malware scan: unverified → pass
- [security] Stability: Stability not yet verified: not enough scan history yet (needs a 30-day window).
- [functional regression] License: unverified → fail
- [functional improvement] Dependency health: unverified → partial
- [functional improvement] Maintenance: unverified → pass
- [functional improvement] Schema quality: unverified → good
- [functional improvement] MCP protocol: unverified → pass
- [functional] Licence: UNLICENSED

### 2026-08-01 (score 21, −13)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-31 (score 34, −12)

- [security regression] Provenance: unverified → fail
- [security regression] Malware scan: pass → unverified
- [security improvement] Install scripts: unverified → pass
- [functional regression] License: unverified → fail
- [functional improvement] Maintenance: unverified → pass
- [functional] Licence: UNLICENSED

### 2026-07-27 (score 46)

First indexed and scored.

## MCP tools (16)

### `create_wallet` (~43 tokens)

Create wallet

Create a wallet in the local CrossFin ledger

Input parameters:

- `initialDepositKrw` (number): Optional initial deposit (KRW)
- `label` (string, required): Wallet label

Output parameters:

- `balanceKrw` (number)
- `label` (string)
- `walletId` (string)

### `get_balance` (~27 tokens)

Get balance

Get the balance (KRW) of a wallet

Input parameters:

- `walletId` (string, required)

Output parameters:

- `balanceKrw` (number)
- `walletId` (string)

### `transfer` (~64 tokens)

Transfer

Transfer funds between wallets (KRW)

Input parameters:

- `amountKrw` (number, required): Transfer amount in KRW
- `fromWalletId` (string, required)
- `memo` (string): Memo
- `rail` (string): Payment rail
- `toWalletId` (string, required)

Output parameters:

- `fromBalanceKrw` (number)
- `toBalanceKrw` (number)
- `transactionId` (string)

### `list_transactions` (~42 tokens)

List transactions

List transactions (optionally filtered by wallet)

Input parameters:

- `limit` (number): Max items (1..200). Default 50
- `walletId` (string)

### `set_budget` (~40 tokens)

Set budget

Set a daily spend limit for the local ledger (KRW)

Input parameters:

- `dailyLimitKrw` (required): Daily budget limit (KRW). Use null to clear.

Output parameters:

- `dailyLimitKrw`

### `search_services` (~43 tokens)

Search services

Search the CrossFin service registry for x402 services by keyword

Input parameters:

- `query` (string, required): Search keyword (e.g. "crypto", "translate", "korea")

### `list_services` (~59 tokens)

List services

List services from the CrossFin registry with optional category filter

Input parameters:

- `category` (string): Category filter (e.g. "crypto-data", "ai", "tools")
- `limit` (integer): Max results (default 20, max 100)

### `get_service` (~40 tokens)

Get service

Get detailed information about a specific service by ID

Input parameters:

- `serviceId` (string, required): Service ID (e.g. "crossfin_kimchi_premium")

### `list_categories` (~15 tokens)

List categories

List all service categories with counts

### `get_kimchi_premium` (~37 tokens)

Get route spread

Get free preview of the Route Spread index — real-time price spread between Korean and global crypto exchanges (top 3 pairs)

### `get_analytics` (~25 tokens)

Get analytics

Get CrossFin gateway usage analytics — total calls, top services, recent activity

### `get_guide` (~37 tokens)

Get CrossFin guide

Get the complete CrossFin API guide — what services are available, how to search, pricing, x402 payment flow, and code examples

### `call_paid_service` (~101 tokens)

Call paid service

Call a CrossFin paid API endpoint with automatic x402 USDC payment on Base. Requires EVM_PRIVATE_KEY env var with funded wallet. Returns the API response data plus payment proof (txHash, basescan link).

Input parameters:

- `params` (object): Query parameters
- `serviceId` (string): Service ID from registry — looks up endpoint/price automatically
- `url` (string): Direct URL to call (use this OR serviceId, not both)

### `find_optimal_route` (~237 tokens)

Find optimal route

Find the cheapest/fastest path to move money across Asian exchanges. Example: KRW on Bithumb → USDC on Binance. Supports 14 exchanges (Bithumb, Upbit, Coinone, GoPax, bitFlyer, WazirX, bitbank, Indodax, Bitkub, Binance, OKX, Bybit, KuCoin, Coinbase) and 13 bridge coins (incl. KAIA, SUI, APT). Paid tool: calls /api/premium/route/find ($0.10) via x402 (requires EVM_PRIVATE_KEY).

Input parameters:

- `amount` (number, required): Amount in source currency (e.g. 1000000 for ₩1,000,000)
- `from` (string, required): Source in exchange:currency format (e.g. "bithumb:KRW", "upbit:KRW")
- `strategy` (string): Routing strategy: cheapest (default), fastest, or balanced
- `to` (string, required): Destination in exchange:currency format (e.g. "binance:USDC", "binance:BTC")

### `list_exchange_fees` (~71 tokens)

List exchange fees

Show trading fees, withdrawal fees, and transfer times for all supported exchanges (Bithumb, Upbit, Coinone, GoPax, bitFlyer, WazirX, bitbank, Indodax, Bitkub, Binance, OKX, Bybit, KuCoin, Coinbase)

### `compare_exchange_prices` (~68 tokens)

Compare exchange prices

Compare Bithumb KRW prices vs global USD prices (Binance) for tracked coins. Shows transfer-time estimates and which coins are bridge-capable.

Input parameters:

- `coin` (string): Coin symbol to compare (e.g. "BTC", "XRP"). Omit for all supported coins.

## Diagnostics

Captured diagnostic sections: Provenance, Dependencies. The full working is on the page: https://verifymcp.io/servers/bubilife1202-crossfin/crossfin-mcp#diagnostics

## Score history

- 2026-08-03: 60
- 2026-08-02: 60
- 2026-08-01: 21
- 2026-07-31: 34
- 2026-07-29: 46
- 2026-07-28: 46
- 2026-07-27: 46

## Links

- npm package: https://www.npmjs.com/package/crossfin-mcp
- Socket report: https://socket.dev/npm/package/crossfin-mcp
- Repository: https://github.com/bubilife1202/crossfin
- Changelog RSS feed: https://verifymcp.io/servers/bubilife1202-crossfin/crossfin-mcp/changelog.xml
- Changelog JSON feed: https://verifymcp.io/servers/bubilife1202-crossfin/crossfin-mcp/changelog.json
- HTML version of this page: https://verifymcp.io/servers/bubilife1202-crossfin/crossfin-mcp