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575+ agent tools: data, AI gateway, storage/queues/watchers. x402 USDC, no keys, usage billing.
npx @getmcp/cli add io.github.2s-io/mcpRequires Node.js 18+. Community-contributed server. Review source before installing.
EVM_PRIVATE_KEYHex-encoded EVM private key (0x-prefixed) used by the SDK to sign x402 EIP-3009 payment authorizations. Funds USDC on Base.
Config file: ~/Library/Application Support/Claude/claude_desktop_config.json
{
"mcpServers": {
"io.github.2s-io/mcp": {
"command": "npx",
"args": [
"-y",
"@2sio/mcp"
],
"env": {
"EVM_PRIVATE_KEY": ""
}
}
}
}