Private x402 payments on Solana: shield, pay, and unshield USDC under caps you set.
Connect Runs on your machine
claude mcp add shinjuku-shield -e SHIELDED_WALLET_HOME=<SHIELDED_WALLET_HOME> -e SHIELDED_WALLET_PASSPHRASE=<SHIELDED_WALLET_PASSPHRASE> -- npx -y [email protected]{
"mcpServers": {
"shinjuku-shield": {
"command": "npx",
"args": [
"-y",
"[email protected]"
],
"env": {
"SHIELDED_WALLET_HOME": "<SHIELDED_WALLET_HOME>",
"SHIELDED_WALLET_PASSPHRASE": "<SHIELDED_WALLET_PASSPHRASE>"
}
}
}
}{
"mcpServers": {
"shinjuku-shield": {
"command": "npx",
"args": [
"-y",
"[email protected]"
],
"env": {
"SHIELDED_WALLET_HOME": "<SHIELDED_WALLET_HOME>",
"SHIELDED_WALLET_PASSPHRASE": "<SHIELDED_WALLET_PASSPHRASE>"
}
}
}
}{
"servers": {
"shinjuku-shield": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"[email protected]"
],
"env": {
"SHIELDED_WALLET_HOME": "<SHIELDED_WALLET_HOME>",
"SHIELDED_WALLET_PASSPHRASE": "<SHIELDED_WALLET_PASSPHRASE>"
}
}
}
}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 |
|---|---|
SHIELDED_WALLET_HOMEOptional | The private folder that holds the encrypted wallet and config.json. Default: ~/.carbon-shielded-wallet (the folder that setup uses). |
SHIELDED_WALLET_PASSPHRASEOptional, secret | The wallet passphrase, if you do not use --passphrase-file. |
Details
| Package | [email protected] (NPM, stdio) |
| First published | 11 Nov 2026 |
| Last updated | 11 Nov 2026 |
| Registry name | io.github.ShinjukuStaition/shinjuku-shield |
More finance and crypto servers See all
Listing data from the official MCP registry. Status and tools from NestDaddy's daily check. Browse all MCP servers.