X402engine MCP runs on your own machine — the client starts it, so there is no endpoint to ping. 125 installs a week from npm. Last commit 11 Oct 2026.
50+ pay-per-call APIs for AI agents — images, LLM, code, crypto, travel & more via x402
We read the source, 1 d ago · rules 995398eba69f
What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.
…v=(0,lt.or)(v,...l.map(x=>(0,lt._)`${(0,Fs.usePattern)(t,x)}.test(${g})`))),(0,lt.not)(v)}function f(g){e.code((0,lt._)`delete ${o}[${g}]`)}function p(g){if(c.removeAdditional==="all"||c.removeAdditional&&r===!1){f(g);return}if(r===!1){t.setParams({additionalProperty:g}),t.error(…
Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.
We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.
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 x402engine-mcp -- npx -y x402engine-mcp
{
"mcpServers": {
"x402engine-mcp": {
"command": "npx",
"args": [
"-y",
"x402engine-mcp"
]
}
}
}
[mcp_servers.x402engine-mcp]
command = "npx"
args = ["-y", "x402engine-mcp"]
{
"mcpServers": {
"x402engine-mcp": {
"command": "npx",
"args": [
"-y",
"x402engine-mcp"
]
}
}
}
{
"servers": {
"x402engine-mcp": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"x402engine-mcp"
]
}
}
}
Optional settings from the registry entry, left out of the block above:
X402_BASE_URL (Gateway URL (default: https://x402engine.app)), X402_DEV_BYPASS (Dev bypass secret to skip payments during testing), X402_PAYMENT_HEADER (Pre-signed x402 payment header for automatic payment).
Pay-per-call MCP tools via x402 (USDC on Base): QR codes, images, text analysis, web fetch.
Live crypto market data and Hyperliquid wallet reports for AI agents, paid per call with x402.
45 pay-per-call AI agent tools + wallet-owned agent memory. Scraping, SEO, lint, crypto. x402 USDC
45 pay-per-call AI agent tools: scraping, SEO, crypto data, lint, agent memory. x402 USDC on Base.
x402 pay-per-use IBM Granite AI: chat, code, embeddings, analysis, forecasting. Pay USDC per call.
Smart-contract risk reports for AI agents on 20 EVM chains, paid per call via x402 ($0.02 USDC).
Pay-per-call tools for agents via x402 (USDC on Base): Korean data, doc-to-Markdown, web utilities.
Local agent wallet + 900 pay-per-call data APIs — free discovery, x402 USDC, code-level spend caps
Answers built from our own checks of this server.