X402 API runs on your own machine — the client starts it, so there is no endpoint to ping. 134 installs a week from npm. Last commit 30 Sep 2026.
Eight paid DeFi tools: prices, gas, swaps, token security, holders, yields, funding and wallets
Nothing serious here today
Today is the operative word: we check X402 API every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.
Connect this server
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 x402-api -- npx -y @x402-api/mcp-server{
"mcpServers": {
"x402-api": {
"command": "npx",
"args": [
"-y",
"@x402-api/mcp-server"
]
}
}
}[mcp_servers.x402-api]
command = "npx"
args = ["-y", "@x402-api/mcp-server"]{
"mcpServers": {
"x402-api": {
"command": "npx",
"args": [
"-y",
"@x402-api/mcp-server"
]
}
}
}{
"servers": {
"x402-api": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"@x402-api/mcp-server"
]
}
}
}Optional settings from the registry entry, left out of the block above:
X402_API_BASE_URL (x402 API base URL (default: https://x402-api.fly.dev)), X402_WALLET_PRIVATE_KEY (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).
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X402 API — questions
Answers built from our own checks of this server.