Web3.js Ethereum API

Web3.js is the leading free and open-source JavaScript/TypeScript library for interacting with Ethereum and EVM-compatible networks. It supports HTTP/WebSocket/IPC providers, smart contracts, accounts, subscriptions, and extensive utilities. Ideal for dApp and blockchain development.

1

Endpoints

29

Views

Jul 20, 2025

Last Checked

NaN

Rate Limit

API Endpoints

Executes Ethereum blockchain operations

Full URL

https://github.com/ethereum/web3.js/

Code Examples

curl -X POST 'https://github.com/ethereum/web3.js/'

Parameters

{
  "id": 1,
  "method": "eth_blockNumber",
  "params": [],
  "jsonrpc": "2.0"
}

Example Response

{
  "id": 1,
  "result": "0x10c7b6",
  "jsonrpc": "2.0"
}

Version

v1

Rate Limit

1000 requests/minute
Tags
ethereumweb3
Technical Details
Authentication
None
Response Formats
JSON-RPC
Availability
global
Status
Published
Rate Limits

Varies by node provider

Supported Languages
JavaScript
Use Cases
dapp development
smart contracts

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Free Web3.js Ethereum JavaScript API | Free API Hub