CoinGecko Data Access Node Server

A robust and adaptable Node.js Express backend furnishing a complete gateway to the CoinGecko digital asset information repository. This service natively supports access to both the public tier and the enhanced Pro API, featuring automatic tier switching.

Initiation Guide

bash

Bootstrap and execute via npx

npx crypto-data-gateway-service

Alternatively, obtain and set up manually

git clone https://github.com/GaplyDev01/coingecko-api-server.git cd coingecko-api-server npm install npm run setup npm start

Core Capabilities

• 🔄 Tiered API Compatibility: Seamlessly integrates with both CoinGecko Free and Pro data sources.
• 🔙 Resilience Mechanism: Automatically defaults to the free interface during non-production runtime.
• 🔌 HTTP Interface: Presents a clean, straightforward RESTful access layer.
• 🛡️ Error Management: Provides detailed diagnostic feedback and appropriate HTTP response codes.
• 🧩 Rapid Deployment: Expedited installation process incorporating guided configuration.
• 📝 Thorough Documentation: Clear instructions detailing operational procedures.

Deployment Pathways

Method 1: Using npx (Recommended Approach)

This offers the quickest path to operational status:

bash npx crypto-data-gateway-service

The guided initialization sequence will perform the following actions: 1. Inquire about the desired installation location for the server instance. 2. Fetch the requisite repository files. 3. Populate necessary software packages. 4. Solicit your CoinGecko authorization token (this step is optional). 5. Establish the operational network port for the server.

Method 2: Manual Repository Setup

For users preferring hands-on environment configuration:

bash

Clone the repository source code

git clone https://github.com/GaplyDev01/coingecko-api-server.git cd coingecko-api-server

Install requisite dependencies

npm install

Execute the setup utility

npm run setup

Launch the application instance

npm start

System Parameters

The operational characteristics of the service are modulated via environment variables specified within the .env configuration file:

Variable Name	Functionality Description	Default Setting
PORT	The TCP port number the service will monitor for incoming connections	3000
COINGECKO_API_KEY	Your credential for accessing the premium CoinGecko data services	None

Service Access Endpoints

The gateway exposes interfaces mirroring fundamental CoinGecko data access paths:

Status Verification

• GET /api/ping - Verifies the connectivity status of the external CoinGecko service.

Valuation Data Retrieval

• GET /api/simple/price - Fetches current price points for specified assets.

• Query Parameters: ids, vs_currencies, include_market_cap, include_24hr_vol, include_24hr_change, include_last_updated_at, precision

• GET /api/simple/supported_vs_currencies - Retrieves the complete enumeration of accepted comparison currencies.

Asset Metadata

• GET /api/coins/markets - Acquires comprehensive market metrics for designated digital assets.
• Query Parameters: vs_currency, ids, category, order, per_page, page, sparkline, price_change_percentage

Global Statistics

• GET /api/global - Fetches aggregate statistics across the entire cryptocurrency ecosystem.
• GET /api/search/trending - Retrieves a list of currently popular or trending digital assets.

Comprehensive API documentation can be referenced at the official CoinGecko API Documentation.

Component Integration Context

This functions as an MCP (Marketplace Component Program) compatible service, designed for interaction with advanced AI environments like Claude. To deploy this service within Claude Desktop:

1. Initiate the CoinGecko API server instance locally (e.g., on http://localhost:3000).
2. In the Claude Desktop interface, introduce the MCP by supplying the established server Uniform Resource Locator (e.g., http://localhost:3000).
3. Claude is then empowered to query real-time cryptocurrency figures via this dedicated interface.

The service adheres strictly to the MCP specification, utilizing JSON-RPC 2.0 for communication protocols:

• JSON-RPC 2.0 Endpoint: /rpc - The designated channel for processing invocation requests originating from consuming AI agents.
• Schema Definition: /mcp/schema - Supplies the machine-readable definition of exposed tools and required input structures.
• Standardized Interoperability: Follows the prescribed MCP communication framework for seamless AI integration.

Consult MCP_INTEGRATION.md for in-depth integration guidelines.

Pro Tier versus Public Tier Functionality

This backend is engineered to leverage both CoinGecko data access levels:

• Pro Tier: Characterized by elevated transactional volume quotas and reduced throttling constraints. Requires a valid API authentication key.
• Public Tier: Subject to stricter usage limits (approximately 30 calls per minute) and potential rate constraints.

The service intelligently ascertains whether an API key is present and selects the appropriate tier. If no key is supplied, it seamlessly defaults to the Public Tier functionality, which is optimal for iterative development or personal projects.

For prerequisites concerning Pro API configuration, review USING_COINGECKO_PRO.md.

Development Operations

bash

Execute in a development environment with live code reloading

npm run dev

The service employs direct data retrieval mechanisms utilizing standard fetch operations, guaranteeing compatibility across both the public and premium CoinGecko service tiers.

Licensing Information

This software artifact is distributed under the terms of the MIT License; full stipulations are detailed within the LICENSE documentation file.

Acknowledgements

• CoinGecko for providing the foundational digital asset data feeds.
• Anthropic for the development of Claude AI and sponsoring the MCP initiative.

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