npm · @x402-api/mcp-server
$npx -y @x402-api/mcp-server@1.0.5 X402_API_BASE_URL — x402 API base URL (default: https://x402-api.fly.dev)
X402_WALLET_PRIVATE_KEY · secret — Base wallet private key for optional EIP-3009 auto-pay. Default mode inspects payment requirements without paying.
X402_MAX_PER_CALL_USDC — Maximum USDC allowed per automatic tool call (default: 0.01)
X402_REFERRAL_SOURCE — Optional referral label: github, glama, nohumans, bazaar, mcp, eliza, demo or test. Default mcp.
X402_EXPECTED_PAY_TO — Expected payment recipient; defaults to the official x402-api wallet. Change only when using a trusted alternative deployment.