Shinjuku Shielded MCP: the private x402 facilitator, inside your agent. Shield, pay, and unshield USDC on Solana. Self-custody, Tor built in.
Setup
Choose your client, copy the config, then fill in any required environment variables.
claude mcp add shinjuku-shielded --env SHIELDED_WALLET_PASSPHRASE='<SHIELDED_WALLET_PASSPHRASE>' -- npx -y shinjuku-shielded~/.codex/config.toml
[mcp_servers.shinjuku-shielded]
command = "npx"
args = ["-y", "shinjuku-shielded"]
env = { SHIELDED_WALLET_PASSPHRASE = "<SHIELDED_WALLET_PASSPHRASE>" }
# codex mcp add shinjuku-shielded --env SHIELDED_WALLET_PASSPHRASE='<SHIELDED_WALLET_PASSPHRASE>' -- npx -y shinjuku-shielded~/.cursor/mcp.json
{
"mcpServers": {
"shinjuku-shielded": {
"command": "npx",
"args": [
"-y",
"shinjuku-shielded"
],
"env": {
"SHIELDED_WALLET_PASSPHRASE": "<SHIELDED_WALLET_PASSPHRASE>"
}
}
}
}.vscode/mcp.json
{
"servers": {
"shinjuku-shielded": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"shinjuku-shielded"
],
"env": {
"SHIELDED_WALLET_PASSPHRASE": "<SHIELDED_WALLET_PASSPHRASE>"
}
}
}
}~/.gemini/settings.json
{
"mcpServers": {
"shinjuku-shielded": {
"command": "npx",
"args": [
"-y",
"shinjuku-shielded"
],
"env": {
"SHIELDED_WALLET_PASSPHRASE": "<SHIELDED_WALLET_PASSPHRASE>"
}
}
}
}claude_desktop_config.json
{
"mcpServers": {
"shinjuku-shielded": {
"command": "npx",
"args": [
"-y",
"shinjuku-shielded"
],
"env": {
"SHIELDED_WALLET_PASSPHRASE": "<SHIELDED_WALLET_PASSPHRASE>"
}
}
}
}.trae/mcp.json
{
"mcpServers": {
"shinjuku-shielded": {
"command": "npx",
"args": [
"-y",
"shinjuku-shielded"
],
"env": {
"SHIELDED_WALLET_PASSPHRASE": "<SHIELDED_WALLET_PASSPHRASE>"
}
}
}
}Environment variables
SHIELDED_WALLET_PASSPHRASE
Replace the placeholders with your own credentials and keep them out of version control.