Watchdata

API

Simple & Reliable API Access to Ethereum Blockchain Data

Overview

Watchdata API provides RESTful endpoints for Ethereum blockchain data, including account balances, transaction history, block details, smart contract events, and token transfers. Responses are JSON-formatted for easy integration. It supports mainnet and testnets (Goerli, Sepolia) with pagination and filtering options. Ideal for dApp development (real-time transaction tracking), wallet integration (balance displays), blockchain analytics (network activity), and smart contract monitoring (event logging). The API simplifies complex blockchain interactions, reducing dev time for Ethereum-based projects.

Example Integration (JavaScript)

script.js JS


fetch('https://docs.watchdata.io')
  .then(res => res.json())
  .then(data => console.log(data))
  .catch(err => console.error(err));

Key Features

RESTful Interface
JSON Responses
Ethereum Mainnet/Testnet Support
Smart Contract Event Tracking
Token Data Access

Frequently Asked Questions

? Is Watchdata API free to use?

Yes, it offers a free tier with limited requests; paid plans are available for higher usage and advanced features.

? Does it require an API Key?

Yes, an API key is needed for authentication, obtainable via the Watchdata platform.

? What is the response format?

All responses are in JSON format, ensuring easy parsing for developers.

Top Alternatives

Etherscan API Search Google

Alchemy API Search Google

Infura API Search Google

Tool Info

Pricing Freemium

Category Blockchain

Platform Public API

Pros

⊕ Easy to Integrate
⊕ Reliable Data
⊕ Comprehensive Endpoints

Cons

⊖ Rate Limits on Free Tier
⊖ Ethereum-Only Support