Etherscan MCP: onchain data and contract source in your AI app

Query Etherscan from Claude, ChatGPT or Cursor

1. 1Click Connect Etherscan free. There's no sign-in, so its tools are ready at once.
2. 2Every tool reads chain data, from `get_native_balance` to `get_logs`, so none of them can send a transaction. Switch off `render_etherscan_widget` if your AI app shouldn't draw explorer-style cards, or any lookup you don't use.
3. 3Add ContextGate to your AI app as a connector or MCP server. The steps for each app are on the Works with page.
4. 4Paste a transaction hash into your AI app and ask whether it failed and how much gas it used, then open Activity to see the `get_transaction_receipt` call.

Onchain questions for Claude, ChatGPT or Cursor

• Check an address's ETH balance with `get_native_balance` and its history with `get_transactions`.
• List ERC-20, NFT or ERC-1155 transfers for an address with `get_token_transfers`.
• Read a contract's verified source and ABI with `get_contract_source` and `get_contract_abi` while you code against it.
• Get safe, proposed and fast gas prices with `get_gas_oracle` before you send a transaction yourself.

Read-only, and recorded

• Etherscan's server only reads data, so your AI app can't move funds through it.
• Activity keeps a record of every address and contract your team looked up.
• Switch off any of the 17 tools you don't need; your AI apps can no longer see or call it.

What you get with Etherscan and ContextGate

• Your AI apps can use EtherscanClaude, Cursor, ChatGPT and other AI apps reach Etherscan through the one ContextGate connection you add to them.
• You choose which tools they can useSwitch off any Etherscan tool you don't want used. It's hidden from your AI apps and refused if called.
• Every call is checked and recordedYour policies check each call (for example, personal data is hidden and secrets are blocked), and Activity keeps a record of it.

ContextGate sees only the tool calls that go through it, not your AI app's built-in tools or your chats.

Etherscan tools

Examples of what your AI apps can do in Etherscan. You'll see the exact list of tools after you connect it.

• get_native_balanceGet the native coin (e.g. ETH) balance of an address, in wei.
• get_transactionsGet the list of normal (external) transactions for an address.
• get_internal_transactionsGet internal transactions for an address, or by a specific parent transaction hash.
• get_token_transfersGet token transfer events for an address, optionally filtered by token contract. Select the token standard: erc20 (fungible, default), erc721 (NFT), or erc1155
• resolve_ens_nameResolve an ENS name (or onchain subdomain, e.g. etherscan.eth or gm.etherscan.eth) to its Ethereum address. Ethereum mainnet only. Offchain names that require C
• get_contract_sourceGet the verified source code and metadata for a contract address.
• get_contract_abiGet the verified ABI (JSON) for a contract address.
• get_contract_creationGet the creator address and creation transaction hash for up to 5 contract addresses. The multi-kilobyte creation bytecode is omitted by default to keep respons
• get_transaction_receipt_statusGet the receipt status of a transaction (1 = success, 0 = failed). Post-Byzantium only.
• get_transaction_statusGet the contract execution status of a transaction (detects failed/erroring executions).
• get_gas_oracleGet current gas price recommendations (safe / propose / fast) from the gas tracker.
• get_block_by_timestampGet the block number closest to a given Unix timestamp (seconds).
• get_supported_chainsGet the chains / chain IDs supported by the Etherscan V2 API. In the hosted (proxy) deployment this returns a bundled snapshot shipped with the server, refreshe
• get_logsSearch event logs by contract address and/or topics over a block range. Topics are 32-byte hex values; topic0 is usually the keccak256 event-signature hash. Adj
• get_transaction_by_hashGet the full transaction object for a transaction hash (from, to, value, input data, gas, gas price, nonce, block number/hash, transaction index). Returns null
• get_transaction_receiptGet the transaction receipt for a transaction hash (execution status, gas used, cumulative gas used, effective gas price, logs, and the created contract address
• render_etherscan_widgetPresent exact facts returned by Etherscan data tools in a fast explorer-style card. Call the relevant Etherscan data tool first and copy only supported values i