Bitso MCP Server

An MCP server for the Bitso API that provides tools to access withdrawals and fundings data. Built with TypeScript, featuring comprehensive testing, dual transport support, and production-ready best practices.

Features

🏦 Bitso API Integration

• Complete Withdrawals API support (list, get by ID, get by multiple IDs, get by origin IDs)

• Complete Fundings API support (list, get by ID)

• Proper authentication with API key/secret and HMAC signature

• Support for all API filtering and pagination parameters

🚀 Production Ready

• Dual transport support (stdio for Claude Desktop, HTTP for development)

• Comprehensive error handling and logging

• Type-safe configuration with Zod validation

• Project-root-aware file logging system

🧪 Comprehensive Testing

• Two-tier testing strategy (unit + integration tests)

• Real MCP protocol testing (not mocked functions)

• MSW for consistent API mocking

• High test coverage with Vitest

🛠️ Developer Experience

• Hot reloading with TypeScript watch mode

• Tool generation script

• ESM support with proper module resolution

• CI/CD pipeline with GitHub Actions

📦 Best Practices

• Modular tool organization

• Zod schema validation for all inputs

• Structured logging with file output

• Caching with configurable TTL

Related MCP server: coin-mcp-server

Quick Start

1. Setup

npm install

2. Configure Environment

cp .env.example .env
# Edit .env with your Bitso API credentials

Required environment variables:

• BITSO_API_KEY: Your Bitso API key

• BITSO_API_SECRET: Your Bitso API secret

3. Build and Test

# Build the project
npm run build

# Run tests
npm run test

# Start development server (HTTP mode)
npm run start:http

4. Add to Claude Desktop

Add to your Claude Desktop configuration (claude_desktop_config.json):

{
  "mcpServers": {
    "bitso-mcp-server": {
      "command": "node",
      "args": ["/path/to/bitso-mcp-server/dist/src/index.js"],
      "env": {
        "BITSO_API_KEY": "your-bitso-api-key",
        "BITSO_API_SECRET": "your-bitso-api-secret"
      }
    }
  }
}

Available Tools

The server provides 6 tools to interact with the Bitso API:

Withdrawals Tools

1. list_withdrawals - List withdrawals with optional filtering

   • Parameters: currency, limit, marker, method, origin_id, status, wid

2. get_withdrawal - Get specific withdrawal by ID

   • Parameters: wid (required)

3. get_withdrawals_by_ids - Get multiple withdrawals by comma-separated IDs

   • Parameters: wids (required, e.g., "wid1,wid2,wid3")

4. get_withdrawals_by_origin_ids - Get withdrawals by client-supplied origin IDs

   • Parameters: origin_ids (required, e.g., "origin1,origin2,origin3")

Fundings Tools

5. list_fundings - List fundings with optional filtering

   • Parameters: limit, marker, method, status, fids

6. get_funding - Get specific funding by ID

   • Parameters: fid (required)

Development Guide

Project Structure

src/
├── tools/           # MCP tool implementations
│   └── bitso-tools.ts  # Bitso API tools
├── utils/           # Shared utilities
│   └── logging.ts   # Project-root-aware logging
├── client.ts        # Bitso API client with authentication
├── config.ts        # Environment configuration
├── types.ts         # TypeScript type definitions
└── index.ts         # Main server entry point

tests/
├── unit/            # Fast unit tests with MSW mocking
├── integration/     # Real MCP protocol tests
├── helpers/         # Test utilities
│   ├── mcp-test-helper.ts
│   ├── test-server-factory.ts
│   └── test-config.ts
├── mocks/           # MSW request handlers
└── setup.ts         # Test environment setup

Creating New Tools

Use the built-in tool generator:

npm run build
npm run create-tool

Or create manually following the pattern in src/tools/bitso-tools.ts:

import { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
import { z } from "zod";

const MyToolSchema = z.object({
  param: z.string().min(1, "Parameter is required"),
});

export function registerMyTools(server: McpServer, client: BitsoApiClient): void {
  server.tool(
    "my_tool",
    {
      description: "Description of what the tool does",
      inputSchema: {
        type: "object",
        properties: {
          param: {
            type: "string",
            description: "Parameter description",
          },
        },
        required: ["param"],
      },
    },
    async (params): Promise<ToolResult> => {
      try {
        const validatedParams = MyToolSchema.parse(params);
        
        // Your tool logic here
        
        return {
          content: [
            {
              type: "text",
              text: "Tool response"
            }
          ]
        };
      } catch (error) {
        // Error handling
        return {
          content: [
            {
              type: "text",
              text: `Error: ${error instanceof Error ? error.message : String(error)}`
            }
          ]
        };
      }
    }
  );
}

Testing Strategy

This template uses a two-tier testing approach:

Unit Tests (tests/unit/)

• Test business logic in isolation

• Mock external APIs using MSW

• Fast execution, run frequently during development

• Focus on data transformations, caching, validation

Integration Tests (tests/integration/)

• Test through real MCP protocol

• Use actual MCP server instances

• Validate tool registration and MCP compliance

• Ensure proper request/response formatting

# Run unit tests (fast)
npm run test:unit

# Run integration tests (slower, full MCP protocol)
npm run test:integration

# Run all tests with coverage
npm run test:coverage

Transport Modes

Stdio Transport (Production)

Used by Claude Desktop and other MCP clients:

npm start
# or
node dist/src/index.js

HTTP Transport (Development)

Useful for debugging and development:

npm run start:http
# Server available at http://localhost:3000/mcp

Logging and Debugging

The template includes a sophisticated logging system:

• Debug logs: Written to mcp-debug.log in project root

• Project-root-aware: Works from both source and compiled code

• Structured logging: JSON formatting for complex data

• Console output: Errors also logged to stderr

Check logs during development:

tail -f mcp-debug.log

Configuration Management

Configuration uses Zod for type-safe validation:

// src/config.ts
const ConfigSchema = z.object({
  apiKey: z.string().min(1, 'API_KEY environment variable is required'),
  apiEndpoint: z.string().url().default('https://api.example.com'),
  // ... other config
});

Environment variables are validated on startup with clear error messages.

API Integration

Client Pattern

The template includes a robust API client pattern:

// Automatic caching
const resources = await client.getResources(); // Cached for 5 minutes

// Error handling
try {
  const resource = await client.getResource(id);
} catch (error) {
  // Errors are logged and can be handled
}

// Connection testing
const isHealthy = await client.testConnection();

Bitso API Authentication

The server uses HMAC-SHA256 authentication required by the Bitso API:

// Authentication headers are automatically generated
const authHeaders = {
  'key': config.apiKey,
  'signature': hmacSignature,  // Generated using API secret
  'nonce': timestamp
};

Each request is signed using:

• API Secret (from environment)

• HTTP method

• Request path

• Request body (if any)

• Current timestamp as nonce

Deployment

Building for Production

npm run build
npm test

CI/CD

The template includes a GitHub Actions workflow (.github/workflows/ci.yml):

• Unit tests: Fast feedback on basic functionality

• Integration tests: Full MCP protocol validation

• Coverage reporting: Ensure code quality

• Build validation: Verify compilation

Environment Variables

Production deployment requires:

BITSO_API_KEY=your-production-api-key
BITSO_API_SECRET=your-production-api-secret
BITSO_API_ENDPOINT=https://api.bitso.com  # Production endpoint
CACHE_TTL_SECONDS=300
TIMEOUT=30000

Best Practices

Tool Development

1. Always use Zod schemas for parameter validation

2. Return MCP-compliant responses with { content: [...] } format

3. Handle errors gracefully with user-friendly messages

4. Log extensively for debugging and monitoring

5. Test through MCP protocol using integration tests

Error Handling

// Good: MCP-compliant error response
return {
  content: [
    {
      type: "text",
      text: `Error: ${error.message}`
    }
  ]
};

// Bad: Throwing unhandled errors
throw new Error("Something went wrong");

Performance

• Use caching for expensive API calls

• Implement request timeouts

• Log performance metrics

• Monitor API rate limits

Troubleshooting

Common Issues

Tool not appearing in Claude:

1. Check build succeeded: npm run build

2. Restart Claude Desktop

3. Check mcp-debug.log for errors

4. Verify claude_desktop_config.json configuration

Tests failing:

1. Run unit tests first: npm run test:unit

2. Check MSW handlers match your API expectations

3. Verify integration tests use real MCP server instances

API connection issues:

1. Verify environment variables are set

2. Test API credentials manually

3. Check network connectivity and firewalls

4. Review API endpoint URLs

Debug Mode

Enable detailed logging:

DEBUG=true npm start

Contributing

1. Fork the repository

2. Create a feature branch

3. Add tests for new functionality

4. Ensure all tests pass: npm test

5. Build successfully: npm run build

6. Submit a pull request

License

MIT License. See LICENSE for details.

Related Resources

• MCP Official Documentation

• Claude Desktop Integration Guide

• Vitest Testing Framework

• Zod Schema Validation