Web3 MCP proxy for AI agents: DeFi swaps, bridges, market data, wallets, and gated writes.
To add web3agent to Claude, run the install command below or copy the ready-made config for Claude Code, Claude Desktop, Cursor and VS Code further down. Restart your client after adding it and its tools show up in your next conversation. It needs 7 environment variables, listed below.
Install
npx -y web3agent@0.6.2Environment variables
CHAIN_IDSet in your MCP configCONFIRM_WRITESSet in your MCP configETHERSCAN_API_KEYSet in your MCP configZEROX_API_KEYSet in your MCP configCOINGECKO_API_KEYSet in your MCP configCCXT_CONFIG_PATHSet in your MCP configOWS_PASSPHRASESet in your MCP configInstall with your client
claude mcp add web3agent --env CHAIN_ID=<YOUR_CHAIN_ID> --env CONFIRM_WRITES=<YOUR_CONFIRM_WRITES> --env ETHERSCAN_API_KEY=<YOUR_ETHERSCAN_API_KEY> --env ZEROX_API_KEY=<YOUR_ZEROX_API_KEY> --env COINGECKO_API_KEY=<YOUR_COINGECKO_API_KEY> --env CCXT_CONFIG_PATH=<YOUR_CCXT_CONFIG_PATH> --env OWS_PASSPHRASE=<YOUR_OWS_PASSPHRASE> -- npx -y web3agent@0.6.2
Run this in a terminal to add the server to Claude Code.
What this does
web3agent exposes a set of tools to Claude over the Model Context Protocol. After you add it to claude_desktop_config.json (snippet above) and restart Claude Desktop, those tools become callable inside any conversation.
Requirements
This server needs the following environment variables to be set before it can run:
CHAIN_ID CONFIRM_WRITES ETHERSCAN_API_KEY ZEROX_API_KEY COINGECKO_API_KEY CCXT_CONFIG_PATH OWS_PASSPHRASE
Set these via the env object in your MCP config (see claude_desktop_config.json snippet above).
Frequently asked questions
How do I install web3agent?
Run the Claude Code command in the install section to add web3agent to Claude Code, or copy the ready-made config for your client from the install section on this page. Restart your client afterwards and the tools appear in your next conversation.
Which clients work with web3agent?
This page carries setup and config for Claude Code, Claude Desktop, Cursor and VS Code. Any other MCP client that accepts a standard server config can connect to web3agent as well.
Does web3agent need an API key?
Yes. Before it can run, set these environment variables: CHAIN_ID, CONFIRM_WRITES, ETHERSCAN_API_KEY, ZEROX_API_KEY, COINGECKO_API_KEY, CCXT_CONFIG_PATH, OWS_PASSPHRASE. They go in the env block of your MCP config.
Imported from the Official MCP Registry. The details above come from the registry entry; the maker can claim this listing to correct them, add docs, and see its traffic.
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