web3agent MCP Server

by apegurusio.github.Apegurus/web3agentv0.6.2

Web3 MCP proxy server — gives AI agents complete blockchain capabilities through a single install

1Node.jsstdioofficial registry

context tax

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security

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cold start

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freshness

Slowing3mo ago

Install web3agent MCP server

claude mcp add web3agent -e ETHERSCAN_API_KEY='<etherscan-api-key>' -e ZEROX_API_KEY='<zerox-api-key>' -e COINGECKO_API_KEY='<coingecko-api-key>' -e OWS_PASSPHRASE='<ows-passphrase>' -- npx -y web3agent web3agent

{
  "mcpServers": {
    "web3agent": {
      "command": "npx",
      "args": [
        "-y",
        "web3agent",
        "web3agent"
      ],
      "env": {
        "ETHERSCAN_API_KEY": "<etherscan-api-key>",
        "ZEROX_API_KEY": "<zerox-api-key>",
        "COINGECKO_API_KEY": "<coingecko-api-key>",
        "OWS_PASSPHRASE": "<ows-passphrase>"
      }
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project).

{
  "mcpServers": {
    "web3agent": {
      "command": "npx",
      "args": [
        "-y",
        "web3agent",
        "web3agent"
      ],
      "env": {
        "ETHERSCAN_API_KEY": "<etherscan-api-key>",
        "ZEROX_API_KEY": "<zerox-api-key>",
        "COINGECKO_API_KEY": "<coingecko-api-key>",
        "OWS_PASSPHRASE": "<ows-passphrase>"
      }
    }
  }
}

Settings → Developer → Edit Config (claude_desktop_config.json), then restart.

{
  "servers": {
    "web3agent": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "web3agent",
        "web3agent"
      ],
      "env": {
        "ETHERSCAN_API_KEY": "<etherscan-api-key>",
        "ZEROX_API_KEY": "<zerox-api-key>",
        "COINGECKO_API_KEY": "<coingecko-api-key>",
        "OWS_PASSPHRASE": "<ows-passphrase>"
      }
    }
  }
}

Add to .vscode/mcp.json in your workspace.

{
  "mcpServers": {
    "web3agent": {
      "command": "npx",
      "args": [
        "-y",
        "web3agent",
        "web3agent"
      ],
      "env": {
        "ETHERSCAN_API_KEY": "<etherscan-api-key>",
        "ZEROX_API_KEY": "<zerox-api-key>",
        "COINGECKO_API_KEY": "<coingecko-api-key>",
        "OWS_PASSPHRASE": "<ows-passphrase>"
      }
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json.

Configuration

Variable	Required	Secret	Description
CHAIN_ID	—	—	Default EVM chain ID. Defaults to Base mainnet (8453).
CONFIRM_WRITES	—	—	Require explicit confirmation before write operations execute. Defaults to true.
ETHERSCAN_API_KEY	—	yes	Optional Etherscan API key for Etherscan-backed explorer tools.
ZEROX_API_KEY	—	yes	Optional 0x API key for 0x swap plugin support.
COINGECKO_API_KEY	—	yes	Optional CoinGecko API key for higher-rate market data.
CCXT_CONFIG_PATH	—	—	Optional local path to a CCXT account config JSON file.
OWS_PASSPHRASE	—	yes	Optional Open Wallet Standard vault passphrase for persisted local wallets.

Freshness

Slowing — last maintenance signal 3mo ago. The newest of the signals below sets the band.

Last commit (default branch)
2026-07-01 · 3mo ago · GitHub
Latest release
2026-06-30 · 3mo ago · GitHub · v0.6.2
Package published
no data · npm/PyPI
Registry entry updated
2026-06-30 · 3mo ago · official registry · v0.6.2

FAQ

›How do I install the web3agent MCP server in Claude Code?

Run: claude mcp add web3agent -e ETHERSCAN_API_KEY='<etherscan-api-key>' -e ZEROX_API_KEY='<zerox-api-key>' -e COINGECKO_API_KEY='<coingecko-api-key>' -e OWS_PASSPHRASE='<ows-passphrase>' -- npx -y web3agent web3agent. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.

›Does web3agent require an API key?

Yes. It expects ETHERSCAN_API_KEY, ZEROX_API_KEY, COINGECKO_API_KEY, OWS_PASSPHRASE, of which 4 are secrets.

›Can I use web3agent as a remote (hosted) MCP server?

No hosted endpoint is published; it runs locally over stdio.

›Is web3agent in the official MCP registry?

Yes, as io.github.Apegurus/web3agent.