Cresium MCP Server

MCP (Model Context Protocol) server the Cresium API. Enables AI tools like Claude Code and Claude Desktop to manage transactions, payments, invoices, and balances through the Cresium Partner API (V3).

Prerequisites

You need a Cresium partner account with:

• API Key (apiKey)
• Secret (secret)
• Company ID (companyId)

These are available from the Cresium Dashboard under your partner settings.

Installation

Claude Code

claude mcp add cresium-server \
  -e CRESIUM_API_KEY=your_api_key \
  -e CRESIUM_SECRET=your_secret \
  -e CRESIUM_COMPANY_ID=your_company_id \
  -- node /absolute/path/to/cresium-mcp-server/build/index.js

Claude Desktop

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "cresium": {
      "command": "node",
      "args": ["/absolute/path/to/cresium-mcp-server/build/index.js"],
      "env": {
        "CRESIUM_API_KEY": "your_api_key",
        "CRESIUM_SECRET": "your_secret",
        "CRESIUM_COMPANY_ID": "your_company_id"
      }
    }
  }
}

Build from source

git clone <repo-url>
cd cresium-mcp-server
npm install
npm run build

Environment Variables

Variable	Required	Description
CRESIUM_API_KEY	Yes	Partner API key
CRESIUM_SECRET	Yes	Partner secret for HMAC signing
CRESIUM_COMPANY_ID	Yes	Company ID to operate on

Available Tools

Tool	Description
health_check	Check API availability
get_balance	Get wallet balances (balance, locked, invested, available)
search_transactions	Search transactions with filters and pagination
get_transaction	Get a single transaction by ID
lookup_bank_address	Look up a CBU/CVU/alias to get the address ID
create_transfer_preview	Create a transfer preview (does not execute)
confirm_transaction	Confirm a previewed transaction
create_signature_request	Request signer approval for a transaction
create_payments	Create payments (accounts payable)
create_invoices	Create invoices (accounts receivable)
list_payments	List all company payments
list_invoices	List all company invoices

Typical Workflow

Send a transfer

1. Look up the destination: lookup_bank_address with the CBU/CVU/alias
2. Create a preview: create_transfer_preview with the address ID, amount, and currency
3. Request approval: create_signature_request with the transaction ID (signers approve from Dashboard)

Check balances and transactions

1. Get balances: get_balance to see available funds per currency
2. Search transactions: search_transactions with date or status filters
3. Get details: get_transaction with a specific transaction ID

Authentication

All requests are signed using HMAC-SHA256. The server handles this transparently:

signature = HMAC-SHA256("{timestamp}|{METHOD}|{path}|{body}", secret) → base64

Headers sent on every request: x-api-key, x-company-id, x-timestamp, x-signature

License

MIT