Xenarch MCP runs on your own machine — the client starts it, so there is no endpoint to ping. 120 installs a week from npm. Last commit 1 Aug 2026.
Xenarch — x402 MCP server for AI agent payments. Non-custodial, USDC on Base L2.
Today is the operative word: we check Xenarch MCP every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.
This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.
claude mcp add xenarch-mcp -- npx -y @xenarch/agent-mcp
{
"mcpServers": {
"xenarch-mcp": {
"args": [
"-y",
"@xenarch/agent-mcp"
],
"command": "npx"
}
}
}
[mcp_servers.xenarch-mcp]
command = "npx"
args = ["-y", "@xenarch/agent-mcp"]
{
"mcpServers": {
"xenarch-mcp": {
"args": [
"-y",
"@xenarch/agent-mcp"
],
"command": "npx"
}
}
}
{
"mcpServers": {
"xenarch-mcp": {
"args": [
"-y",
"@xenarch/agent-mcp"
],
"command": "npx"
}
}
}
This one needs environment variables set before it will start:
XENARCH_PRIVATE_KEY (Wallet private key (hex, 0x-prefixed). Auto-generates on first run if omitted.), XENARCH_RPC_URL (Base RPC endpoint URL), XENARCH_NETWORK (Network for payments (base or base-sepolia)), XENARCH_MAX_PAYMENT_USD (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.), PORT (Port for HTTP server (default: 3000)), TRANSPORT (Set to 'http' to enable HTTP transport).
The author declared them in the registry entry; get the values from the project itself.
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Answers built from our own checks of this server.