The Etherscan Claude connector lets you ask Claude about any wallet, transaction or smart contract on 60+ EVM chains, in plain English, with no API key and no Etherscan account. You add it once from Claude’s connector directory, then paste an address and ask a question. Claude pulls the live onchain data from Etherscan and explains it.
Etherscan launched the connector publicly on October 21, 2026. I set it up the same day and ran it through my usual wallet checks. Below is how to connect it, what it can and cannot do, and the prompts I use as an airdrop farmer with far too many wallets.
What the Etherscan Claude Connector Does
Etherscan is the block explorer most of us already have open in a tab. The connector moves that data into your Claude chat. Instead of clicking through tabs on Etherscan, Basescan or Arbiscan, you type a question. Claude then calls the right Etherscan tools and reads the result back to you.
Under the hood it runs on Etherscan’s keyless MCP server. MCP is the same standard that powers the CoinGecko Claude connector we covered earlier. Think of it as a menu of tools the AI can call. Each tool is a wrapper around a real Etherscan API endpoint, so Claude is not guessing. It is reading actual chain data.
Here is what it can look up:
- Native coin balances for any address
- ERC-20, ERC-721 and ERC-1155 token transfers
- Normal and internal transaction history
- A transaction’s details, receipt and status
- Verified contract source code, ABI, creator and creation transaction
- Event logs filtered by address and topics
- The block at a given time, current gas prices, and the list of supported chains
Every tool is read-only. Nothing signs, nothing sends, nothing touches your private keys. That matters, and I come back to it below.
How to Connect Etherscan to Claude
The setup takes about a minute. You need a Claude account on the web app, the desktop app or mobile.
Step 1. Open Claude’s connector directory. The Etherscan listing lives at claude.ai/directory/etherscan. Alternatively, go to Settings, then Connectors, and search for Etherscan.
Step 2. Click Connect to Claude. There is no login screen from Etherscan, no API key field and no account creation. The connector is keyless.
Step 3. Start a new chat. Check that Etherscan is toggled on in the chat’s connector list. If you do not see it, refresh the page or start another new chat. Connector changes sometimes only show up in a fresh conversation.
Step 4. Ask your first question. Etherscan’s own example is a good test. Paste this:
Inspect a verified Ethereum smart contract and its deployment details. 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48
Claude should call three tools, pull the source, the ABI and the creation transaction, and tell you this is the USDC proxy contract with its deployer and deployment date. If that works, you are connected.
One tip for every question after that. Name the chain. Say “on Base” or “on Arbitrum” in your prompt. Otherwise Claude defaults to Ethereum mainnet and you may wonder why a Base wallet shows an empty balance.
Prompts I Use for Wallet Checks
I farm airdrops across more than a hundred wallets a year. Every few months I run a cleanup round across all of them, looking for dust, forgotten airdrops and stuck bridge withdrawals. My full routine is in the guide on cleaning out old wallets to find coins. The connector makes the boring part of that routine a lot faster.
Balance sweep. “Check the ETH balance of 0x… on Ethereum, Base, Arbitrum and Optimism and list any ERC-20 tokens it received in the last 12 months.” One prompt instead of four explorer tabs.
Unclaimed airdrops. “List all ERC-20 token transfers into 0x… on Arbitrum since January. Flag any tokens I never moved out.” Incoming transfers you never touched are often airdrops you forgot about.
Stuck bridge funds. “Show the outgoing transactions from 0x… that interacted with the Arbitrum bridge contract and tell me which ones have no matching claim.” This is a first pass only. Always verify in the official bridge interface before you claim, as I explained in the post on stuck crypto funds sitting in bridges.
Contract check before you ape. “Is the contract at 0x… on Base verified? Who deployed it, when, and is it a proxy?” An unverified contract from a fresh deployer is a red flag. Claude reads the source so you do not have to.
Transaction debugging. “Why did transaction 0x… fail?” The connector pulls the receipt and status. Combined with the internal transactions, Claude can usually explain the revert in plain words.
Gas timing. “What are gas prices on Ethereum right now, and what was the block at 9 AM UTC yesterday?” Handy before a batch of claims.
Results also show up as an interactive Etherscan card in the chat. Addresses, hashes and amounts stay exact, so you can click through and check the raw record on Etherscan yourself. Do that for anything that involves money.
Limits You Should Know
The free connector ships 16 read-only tools. Etherscan’s PRO tools are not included. That means no full token holdings view, no token info, no top holders, no funding source and no address labels. If you need to know whether a wallet is tagged as an exchange or a known whale, you still open Etherscan.
Rate limits apply, and they are separate from Etherscan’s API plans. For a normal wallet check you will not hit them. If you fire fifty addresses in a row, you might.
Power users have a second option. Etherscan runs a keyed MCP server with all 21 tools, and it uses your own API plan’s limits. You set that one up in Claude Desktop or Claude Code with your Etherscan API key. The keyless connector is the easy door. The keyed server is the tinkerer door.
Finally, the connector covers EVM chains only. Ethereum, Base, Arbitrum, Optimism, BNB Chain, Polygon and 50-plus others are in. Solana, Sui and Bitcoin are not. For those you still need their own explorers.
Safety: Read-Only Is Good, Prompt Injection Is Still Real
The best thing about this connector is what it cannot do. It cannot sign a transaction, approve a token or move funds. You paste public addresses, not seed phrases. In other words, the worst case for a scammer is that Claude reads a wallet balance.
There is still one thing to watch. Onchain data is public, and anyone can write text into it. Token names, contract comments and transaction input data can all carry instructions aimed at an AI. Etherscan itself warns users to be careful when combining this connector with other connectors in the same chat. We wrote about exactly this failure mode when a $170K AI wallet exploit tricked an agent through an encoded message.
My rule is simple. Keep Etherscan in a chat with read-only tools only. Do not run it alongside a wallet connector or any agent that can send money. Research in one chat, execute in another, and always read the raw transaction before you sign anything.
Why This Matters for Airdrop Farmers
Every connector like this one moves us closer to the setup I described in the post on farming airdrops with AI. Price data came first with CoinGecko. Onchain data comes now with Etherscan. The missing piece is execution, and that part should stay in your own hands for a while yet.
For now, the practical win is time. A wallet cleanup round that took me an afternoon takes an hour with Claude doing the lookups. More checks per hour means more forgotten tokens found. If you are running fresh wallets while you clean the old ones, you can browse the latest airdrops and keep them busy.
Keep This Content Free
Finding forgotten tokens with an AI is fun. Paying for the servers that host this guide is less fun. If you want to support AirdropAlert, sign up for an exchange through one of our links. It costs you nothing and you get the same bonuses and fees.
Final Words
The Etherscan Claude connector is a one-minute setup that turns Claude into a block explorer you can talk to. Wallet balances, token transfers, transaction status and verified contracts across 60+ EVM chains, all from a chat window, all read-only, all free.
Use it for research and wallet checks. Keep it away from anything that can sign. Then verify the numbers that matter on Etherscan itself. Done that way, it is one of the more useful AI tools a farmer can add this year.
FAQ
Is the Etherscan Claude connector free?
Yes. It needs no API key, no Etherscan account and no paid Claude plan. Rate limits apply, but normal wallet checks stay well under them.
Which chains does the Etherscan Claude connector support?
All 60+ EVM chains Etherscan covers, including Ethereum, Base, Arbitrum, Optimism, BNB Chain and Polygon. Name the chain in your prompt. Non-EVM chains like Solana are not supported.
Can Claude move my funds through the Etherscan connector?
No. Every tool is read-only. The connector reads public onchain data and cannot sign, approve or send a transaction.
Do I need to connect my wallet?
No. You paste public addresses as text. Never give an AI tool your seed phrase or private key for any reason.
What is the difference between the connector and the Etherscan MCP server?
The connector is the keyless, one-click version with 16 tools. The MCP server with your own API key offers all 21 tools, including PRO data like token holdings and address labels, and uses your API plan’s limits.
Is it safe to use with other Claude connectors?
Etherscan advises caution when combining it with other connectors in the same chat. Onchain text can contain prompt injections. Keep it in a chat without any tool that can move money.
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