Etherscan

Read-only Etherscan V2 blockchain data: balances, transactions, transfers, tokens, contracts, logs.

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What it can do

    What data it sees

    Do you need an account

    No: the server works without sign-in

    Read-only Etherscan V2 blockchain data: balances, transactions, transfers, tokens, contracts, logs.

    How to connect

    How to connect Etherscan to Claude

    The server address to paste into Claude settings:

    https://mcp-keyless.etherscan.io/mcp

    1. Open Claude (claude.ai or the desktop app).
    2. Go to Settings → Connectors.
    3. Click Add custom connector.
    4. Paste the server address copied below into Remote MCP server URL and click Add.
    5. In a chat, click + → Connectors and switch the new connector on.

    Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.

    Authorization

    After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.

    How to connect Etherscan to ChatGPT

    The server address to paste into ChatGPT settings:

    https://mcp-keyless.etherscan.io/mcp

    1. Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
    2. Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
    3. Open Settings → Connectors and click Create.
    4. Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
    5. Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
    6. In a new chat open + → Apps/Connectors and enable the connector.

    OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.

    Authorization

    On first use ChatGPT opens the service's sign-in window. Sign in and approve access.

    How to connect Etherscan to Cursor

    The server address to paste into Cursor settings:

    https://mcp-keyless.etherscan.io/mcp

    Fastest: click Open in Cursor below and confirm the prompt.

    Manually:

    1. In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
    2. Paste the JSON copied below into ~/.cursor/mcp.json (per project: .cursor/mcp.json in the repo root).
    3. Save the file. The server appears in the MCP list; authorize it there if asked.

    Authorization

    If the service needs sign-in, an authorize button appears next to the server in the MCP list.

    Server tool list (16)

    Raw names from tools/list. Only developers need these.

    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 (multi-token).
    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 responses small; set include_creation_bytecode=true to include it.
    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, refreshed when the package is updated; in direct/stdio mode it queries the live chain-list endpoint. A chain's absence from the returned list is not proof that it lacks live support.
    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. Adjacent-topic operators (and/or) combine multiple topic filters. Provide 'address' and/or at least one topic.
    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 if the hash is unknown.
    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 for deployments). Returns null if the hash is unknown or the transaction is still pending.
    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 into this tool. Never invent scores, risk labels, historical prices, forecasts, or audit conclusions.