Xenarch — x402 MCP server for AI agent payments. Non-custodial, USDC on Base L2.
Connect Runs on your machine
claude mcp add xenarch-mcp -e XENARCH_PRIVATE_KEY=<XENARCH_PRIVATE_KEY> -e XENARCH_RPC_URL=<XENARCH_RPC_URL> -e XENARCH_NETWORK=<XENARCH_NETWORK> -e XENARCH_MAX_PAYMENT_USD=<XENARCH_MAX_PAYMENT_USD> -- npx -y @xenarch/[email protected]{
"mcpServers": {
"xenarch-mcp": {
"command": "npx",
"args": [
"-y",
"@xenarch/[email protected]"
],
"env": {
"XENARCH_PRIVATE_KEY": "<XENARCH_PRIVATE_KEY>",
"XENARCH_RPC_URL": "<XENARCH_RPC_URL>",
"XENARCH_NETWORK": "<XENARCH_NETWORK>",
"XENARCH_MAX_PAYMENT_USD": "<XENARCH_MAX_PAYMENT_USD>"
}
}
}
}{
"mcpServers": {
"xenarch-mcp": {
"command": "npx",
"args": [
"-y",
"@xenarch/[email protected]"
],
"env": {
"XENARCH_PRIVATE_KEY": "<XENARCH_PRIVATE_KEY>",
"XENARCH_RPC_URL": "<XENARCH_RPC_URL>",
"XENARCH_NETWORK": "<XENARCH_NETWORK>",
"XENARCH_MAX_PAYMENT_USD": "<XENARCH_MAX_PAYMENT_USD>"
}
}
}
}{
"servers": {
"xenarch-mcp": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"@xenarch/[email protected]"
],
"env": {
"XENARCH_PRIVATE_KEY": "<XENARCH_PRIVATE_KEY>",
"XENARCH_RPC_URL": "<XENARCH_RPC_URL>",
"XENARCH_NETWORK": "<XENARCH_NETWORK>",
"XENARCH_MAX_PAYMENT_USD": "<XENARCH_MAX_PAYMENT_USD>"
}
}
}
}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 |
|---|---|
XENARCH_PRIVATE_KEYOptional, secret | Wallet private key (hex, 0x-prefixed). Auto-generates on first run if omitted. |
XENARCH_RPC_URLOptional | Base RPC endpoint URL |
XENARCH_NETWORKOptional | Network for payments (base or base-sepolia) |
XENARCH_MAX_PAYMENT_USDOptional | Local per-call payment cap in USDC (default 1.00). The only spending ceiling in standalone mode; set 0 to disable. Connect XENARCH_API_TOKEN for managed per-tx/daily/monthly caps. |
Details
| Package | @xenarch/[email protected] (NPM, stdio) |
| Package | @xenarch/[email protected] (NPM, streamable-http) |
| First published | 8 Jul 2026 |
| Last updated | 8 Jul 2026 |
| Registry name | io.github.xenarch-ai/xenarch-mcp |
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