Otterscan

Otterscan is an open-source Ethereum block explorer built on top of Erigon.

Open-source

Visit website

This link will take you to a third-party site not owned or operated by Alchemy.

What is Otterscan?

Created in 2021 by William Mitsuda, Otterscan is an Ethereum blockchain explorer built on top of Erigon. Users can run it locally on their laptops with an archive node companion, more specifically, with Erigon. Otterscan implements custom RPC methods at the rpcdaemon level for faster data retrieval.

Stream any onchain event for Otterscan with Custom Webhooks

Get your API key

Web3 dapps and developer tools related to Otterscan

Discover blockchain applications that are frequently used with Otterscan.

Decimal

Layer 1 blockchains (L1s)

Decimal is a DPoS blockchain that enables developers to create liquid tokens, NFTs, and crypto applications with built-in cross-chain support.

Avalanche

Alchemy CustomerLayer 1 blockchains (L1s)

Avalanche is a scalable, developer-friendly layer 1 blockchain protocol for building customizable, natively interconnected chains.

Alchemy

Alchemy CustomerRPC node providers

Blockchain infrastructure powering billions in onchain transactions

Best Block explorers

Discover more web3 applications and developer tools.

See all dapps

Developer resources from Alchemy

Overview

Solidity

7 best courses to learn Solidity development (2025)

Explore the Best Free and Paid Courses for Learning Solidity Development

Complete guide to Hyperliquid RPC providers: top 8 solutions for 2026

Overview

Infra

Complete guide to Hyperliquid RPC providers: top 8 solutions for 2026

Looking for the best Hyperliquid RPC in 2026? This guide showcases the best providers.

New integrations for rollups partner: Hypernative

Blog

Partnership

New integrations for rollups partner: Hypernative

We've added Hypernative to our integrations marketplace as a trusted partner. Get real-time monitoring, risk detection, and an automated response solution for on-chain and off-chain data sources.