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Web3.js Ethereum API

Web3.js is a free and open-source library for JavaScript and TypeScript, facilitating interaction with Ethereum and EVM-compatible networks, ideal for blockchain applications.

Developed by Ethereum Foundation

View Source
99.60%Uptime
250msLatency
18.5kStars
No AuthAuth
NoCredit Card
RPCStyle
4.0.3Version
API Endpoints

Reference for available routes, request structures, and live examples.

Executes Ethereum blockchain operations

Full Endpoint URL
https://github.com/
Implementation Example
curl -X POST 'https://github.com/'
Request Payload
{
  "id": 1,
  "method": "eth_blockNumber",
  "params": [],
  "jsonrpc": "2.0"
}
Expected Response
{
  "id": 1,
  "result": "0x10c7b6",
  "jsonrpc": "2.0"
}
Version:v1
Limit:1000 requests/minute
Real-World Applications
  • Building decentralized applications (dApps)Optimized Capability
  • Smart contract deployment and interactionOptimized Capability
  • Automated Ethereum transaction signingOptimized Capability
  • Blockchain analytics and monitoring toolsOptimized Capability
  • NFT marketplaces and minting platformsOptimized Capability
Advantages
  • ✓ Free and open-source under the MIT License
  • ✓ Extensive documentation and community support
  • ✓ Supports multiple Ethereum networks and providers
  • ✓ Powerful abstraction layer for blockchain interactions
  • ✓ Compatible with both browser and Node.js environments
Limitations
  • ✗ Directly depends on reliability of external Ethereum nodes
  • ✗ Not well suited for extremely latency-sensitive applications
  • ✗ Requires understanding of Ethereum internals
  • ✗ Potential security risks if handling private keys directly
  • ✗ No official support for non-EVM blockchains

FAQs

API Specifications

4.0.3
Pricing Model
Free / Open Source (MIT License)
Credit Card
Not Required
Response Formats
JSON
Supported Languages
2 Languages
SDK Support
JavaScript, TypeScript
Time to Hello World

Less than 10 minutes with Node.js or browser environment.

Rate Limit

Depends on the connected Ethereum node provider

Free Tier Usage

Web3.js is completely free and open-source for unlimited usage. Node provider (e.g., Infura, Alchemy) limits may apply separately.

Use Case: Best For

Developers building apps on Ethereum and EVM-compatible blockchains who want full control and flexibility.

Not Recommended For

Non-technical users or those needing direct support for non-EVM blockchains.

Resources

Documentation Official Website Source Code Pricing Details Postman Collection
#web3#ethereum

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