Etherscan MCP Server

MCP server wrapping the Etherscan API — the leading Ethereum blockchain explorer. Enables AI agents to query Ethereum transaction history, wallet balances, smart contract ABIs, token transfers, gas prices, and on-chain analytics without running a full Ethereum node. Supports read-only blockchain data access for research and analytics agents.

Evaluated Mar 07, 2026 (0d ago) vcurrent

Homepage ↗ Repo ↗ Other etherscan ethereum blockchain web3 smart-contracts mcp-server defi

⚙ Agent Friendliness

/ 100

Can an agent use this?

🔒 Security

/ 100

Is it safe for agents?

⚡ Reliability

/ 100

Does it work consistently?

Score Breakdown

⚙ Agent Friendliness

MCP Quality

Documentation

Error Messages

Auth Simplicity

Rate Limits

🔒 Security

TLS Enforcement

Auth Strength

Scope Granularity

Dep. Hygiene

Secret Handling

Read-only blockchain data. HTTPS to Etherscan. API key required. No transaction signing. Blockchain data is inherently public.

⚡ Reliability

Uptime/SLA

Version Stability

Breaking Changes

Error Recovery

Best When

A blockchain analyst, DeFi researcher, or Web3 developer wants AI agents to query Ethereum blockchain data — wallet activity, contract interactions, token flows — without running an Ethereum node.

Avoid When

You need to submit transactions, interact with DeFi protocols, or access non-Ethereum chains. Etherscan is read-only blockchain data.

Use Cases

• Querying Ethereum wallet transaction history from blockchain analytics agents
• Fetching smart contract ABIs and verified source code from development agents
• Monitoring token transfers and DeFi activity from portfolio agents
• Analyzing on-chain data for research and compliance agents

Not For

• Signing transactions or submitting transactions to the blockchain (read-only API)
• Non-Ethereum chains without Etherscan deployment (Polygon, BSC have own explorers)
• Real-time transaction streaming (Etherscan API is polling-based)

Interface

REST API

Yes

GraphQL

gRPC

MCP Server

Yes ↗

SDK

Webhooks

Authentication

Methods: api_key

OAuth: No Scopes: No

Etherscan API key required. Free API key available with registration. API key set via ETHERSCAN_API_KEY environment variable.

Pricing

Model: freemium

Free tier: Yes

Requires CC: No

Free Etherscan API key provides substantial limits for most use cases. Community MCP server by crazyrabbitLTC.

Agent Metadata

Pagination

page

Idempotent

Full

Retry Guidance

Not documented

Known Gotchas

⚠ Rate limits are strict on free tier — agent loops can exhaust daily quota quickly
⚠ Etherscan API returns data for Ethereum mainnet only — L2s and other chains need different explorers
⚠ Transaction data can be enormous — implement pagination limits for high-volume wallets
⚠ Community wrapper — Etherscan API version changes may require updates

Alternatives

alchemy-mcp-server infura-mcp-server moralis-mcp-server

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Scores are editorial opinions as of 2026-03-07.