# Etherscan MCP > Lets your agent look up live onchain data from Etherscan: transactions, balances, token transfers and verified contracts on many chains. Etherscan's own hosted MCP server. It connects your agent to live Etherscan API data, so you can ask in plain language about addresses, transactions, tokens and contracts and get answers grounded in real Etherscan API responses. One connection covers every chain Etherscan supports: the agent passes the chain ID (Arbitrum is 42161). What you can do with it - Summarise a transaction: sender, recipient, value, input data, and whether it succeeded - Look up an address's native balance, transactions, internal transfers and token transfers (ERC-20, ERC-721 and ERC-1155) - Read a verified contract's source code and ABI, and find who deployed it - Filter event logs by contract and topics over a block range - Check gas prices, find the block at a given time, and list the supported chains - Show results as an explorer-style Etherscan card How it connects Etherscan runs two official servers over Streamable HTTP. The install steps here use the keyless server, https://mcp-keyless.etherscan.io/mcp: it needs no API key, has 16 of the 21 tools and is rate limited. For every tool, connect https://mcp.etherscan.io/mcp instead, with your Etherscan API key as a bearer token (Authorization: Bearer ); calls there count toward your API plan, and you can create a free key with Etherscan. Five PRO tools need the authenticated server and a paid API plan: token balances with USD values, token info, a token's top holders, address name tags and labels, and the address that first funded an address. Good to know - Read-only: every tool reads public onchain data, and nothing signs or sends a transaction. - Etherscan says listings elsewhere that call themselves "Etherscan MCP" are unofficial and unaffiliated, so only give your API key to mcp.etherscan.io. - To guard against prompt injection, Etherscan recommends turning on your agent's confirmation prompts and taking care when you combine it with other MCP servers. - Type: Plugin - Made by: Etherscan - Category: Crypto & Web3 - Formats: Remote MCP - Version: 2.3.0 - Website: https://docs.etherscan.io/build-with-ai/mcp - Page: https://pluginboard.ai/plugins/etherscan-mcp ## Works with - ChatGPT - Claude - Muse - Grok Bot - Gemini - Grok - GitHub Copilot - Cursor - Claude Code - Codex - Antigravity - Gemini CLI - Replit - OpenClaw - OpenCode - Hermes Agent ## Install You'll need: - `Authorization` (required): Bearer . Create a free key at https://etherscan.io/apis. Replace each `` placeholder with your own value. ### ChatGPT In ChatGPT on the web: Plugins → + → Add custom MCP server, then paste https://mcp-keyless.etherscan.io/mcp under Connection. Business and Enterprise plans; Pro can add read-only servers. ### Claude In Claude (web or desktop): Customize → Connectors → Add custom connector, then paste https://mcp-keyless.etherscan.io/mcp ### Muse In Muse: In a Muse chat, ask it to create a custom connector for the MCP server at https://mcp-keyless.etherscan.io/mcp. Then tap Connect on the card it shows and sign in, or add your key. ### Grok Bot In Grok Bot: In a chat with your Bot, say "Add this MCP server: https://mcp-keyless.etherscan.io/mcp". It confirms the details with you and sets it up, and the tools are ready from your next message. ### Gemini In Gemini: At gemini.google.com: Settings → Connected Apps → Add a custom app, then paste https://mcp-keyless.etherscan.io/mcp ### Grok In Grok on the web: At grok.com/connectors: New Connector → Custom, then enter https://mcp-keyless.etherscan.io/mcp and sign in if it asks. ### GitHub Copilot Add to VS Code: vscode:mcp/install?%7B%22name%22%3A%22etherscan-mcp%22%2C%22type%22%3A%22http%22%2C%22url%22%3A%22https%3A%2F%2Fmcp-keyless.etherscan.io%2Fmcp%22%7D Copilot CLI: ```shell copilot mcp add --transport http etherscan-mcp https://mcp-keyless.etherscan.io/mcp ``` ### Cursor Add to Cursor: cursor://anysphere.cursor-deeplink/mcp/install?name=etherscan-mcp&config=eyJ1cmwiOiJodHRwczovL21jcC1rZXlsZXNzLmV0aGVyc2Nhbi5pby9tY3AifQ%3D%3D Add to .cursor/mcp.json: ```json { "mcpServers": { "etherscan-mcp": { "url": "https://mcp-keyless.etherscan.io/mcp" } } } ``` ### Claude Code Run in your terminal: ```shell claude mcp add --transport http etherscan-mcp https://mcp-keyless.etherscan.io/mcp ``` ### Codex Run in your terminal: ```shell codex mcp add etherscan-mcp --url https://mcp-keyless.etherscan.io/mcp ``` ### Antigravity Add to ~/.gemini/config/mcp_config.json: ```json { "mcpServers": { "etherscan-mcp": { "url": "https://mcp-keyless.etherscan.io/mcp" } } } ``` ### Gemini CLI Run in your terminal: ```shell gemini mcp add --transport http etherscan-mcp https://mcp-keyless.etherscan.io/mcp ``` ### Replit In Replit: At replit.com/integrations, open MCP Servers → + Add MCP server, paste https://mcp-keyless.etherscan.io/mcp (add any headers under Advanced settings), then click Test & save. ### OpenClaw Run in your terminal: ```shell openclaw mcp add etherscan-mcp --url https://mcp-keyless.etherscan.io/mcp --transport streamable-http ``` If it needs a key or sign-in: For https://mcp-keyless.etherscan.io/mcp, add --header NAME=value for each header it needs, or --auth oauth and then run openclaw mcp login etherscan-mcp. ### OpenCode Run in your terminal: ```shell opencode mcp add etherscan-mcp --url https://mcp-keyless.etherscan.io/mcp ``` If it needs a key: For https://mcp-keyless.etherscan.io/mcp, add --header 'NAME=value' for each header it needs. Add --global to use it in every project. ### Hermes Agent Run in your terminal: ```shell hermes mcp add etherscan-mcp --url https://mcp-keyless.etherscan.io/mcp ``` Add to ~/.hermes/config.yaml: ```json { "mcp_servers": { "etherscan-mcp": { "url": "https://mcp-keyless.etherscan.io/mcp" } } } ``` If it signs in with OAuth: If https://mcp-keyless.etherscan.io/mcp asks you to sign in, add --auth oauth to the command, or auth: oauth to its entry. --- From Pluginboard (https://pluginboard.ai).