MCP server for web3
Web3 mcp server lets Claude, Cursor and other MCP clients work with Web3 directly. MCP server for web3.
A Model Context Protocol (MCP) server implementation for Web3 interactions on EVM chains. This server enables seamless interaction with blockchain networks through the Model Context Protocol.
The server is distributed via npm as @smithery/cli, so most clients can run it without a manual build step. Add it to your MCP client's configuration and restart the client to pick it up — the copy-paste configs for Claude Desktop, Claude Code and Cursor are on this page.
Before the server will start you need to supply one environment variable: PRIVATE_KEY. Keep credentials in your client's env block or a secrets manager rather than committing them.
Developer-tool servers are usually the first ones people connect, because they turn "help me with this code" into an assistant that can actually read the repo and act on it. Web3 sits in that group. Worth comparing against the other developer tools servers in this directory before you commit to one, since several overlap in scope but differ sharply in setup cost and permissions.
{
"mcpServers": {
"web3": {
"command": "npx",
"args": ["-y", "@smithery/cli"],
"env": {
"PRIVATE_KEY": "your-value"
}
}
}
}Add to claude_desktop_config.json, then restart Claude Desktop.
| Variable | Description | Required |
|---|---|---|
| PRIVATE_KEY | Credential the server authenticates with. | Yes |
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