575+ agent tools: data, AI gateway, storage/queues/watchers. x402 USDC, no keys, usage billing.
Connect Runs on your machine
claude mcp add mcp -e EVM_PRIVATE_KEY=<EVM_PRIVATE_KEY> -- npx -y @2sio/[email protected]
{
"mcpServers": {
"mcp": {
"command": "npx",
"args": [
"-y",
"@2sio/[email protected]"
],
"env": {
"EVM_PRIVATE_KEY": "<EVM_PRIVATE_KEY>"
}
}
}
}
{
"mcpServers": {
"mcp": {
"command": "npx",
"args": [
"-y",
"@2sio/[email protected]"
],
"env": {
"EVM_PRIVATE_KEY": "<EVM_PRIVATE_KEY>"
}
}
}
}
{
"servers": {
"mcp": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"@2sio/[email protected]"
],
"env": {
"EVM_PRIVATE_KEY": "<EVM_PRIVATE_KEY>"
}
}
}
}
Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.
Tools
This server runs locally, so its tools are listed by your MCP client once it starts.
Environment variables
| Name | Description |
|---|---|
EVM_PRIVATE_KEYRequired, secret | Hex-encoded EVM private key (0x-prefixed) used by the SDK to sign x402 EIP-3009 payment authorizations. Funds USDC on Base. |
Details
| Package | @2sio/[email protected] (NPM, stdio) |
| First published | 21 Aug 2026 |
| Last updated | 21 Aug 2026 |
| Registry name | io.github.2s-io/mcp |
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