mcp

MCP server · hosted · installable · v0.1.1 · dev.x402check/mcp

Online · tested 4h agoNEW · 5h agoNew version 5h agoSeen in the registry 4h ago

Preflight x402 sellers before pay: ok|caution|avoid + history. Paid per tool.

What it does

mcp is an MCP server, a connector that lets an AI assistant use it as a tool. It can be used hosted (nothing to install) or installed locally.

No capability identified yet from its description.

Facts come from the Official MCP Registry, as declared by the publisher. Capabilities are matched automatically (low confidence). None of this is a test of the tool.

At a glance

Hosted (remote)YES

Local installYES

Live checkOnline · 4 tools

Version0.1.1

Packagesnpm

PriceNot in the registry

First seen31 Oct 2026

Last checked4h ago

How to connect

As declared in the Official MCP Registry · hosted endpoint tested by Electra Index 4h ago (live check)

Hosted endpoint

https://x402check.dev/mcp streamable-http

In Claude Code: claude mcp add --transport http mcp-511 https://x402check.dev/mcp

Install package

NPM x402check-mcp v0.1.1 · runs locally (stdio)

Required: X402CHECK_URL (get it from the publisher)

MCP settings (Claude Desktop, Cursor and other MCP clients)

{
  "mcpServers": {
    "mcp-511": {
      "url": "https://x402check.dev/mcp"
    }
  }
}

Live check

Electra Index connected to the hosted endpoint 4h ago

ONLINE mcp answered an MCP connection on 31 Oct 2026 and introduced itself as x402check 0.2.2 (MCP protocol 2024-11-05).

4 tools offered to AI assistants

preflight_check · Mandatory trust preflight before paying any x402 endpoint. Pass the absolute https seller URL. Returns verdict ok|caution|avoid plus that tool's history only (uptime, payToChanges, priceChanges). Use when: about to settle / PAYMENT-SIGNATUR
verify_payto · Verify the payTo / receiving wallet an x402 seller demands before you sign. Same check as preflight_check: live 402 probe + history.payToChanges (wallet rotations) and priceChanges. Use when confirming which Base USDC address you will pay,
preflight_batch · Trust-check up to 25 x402 seller URLs in one request. Charged per URL (N × unit) in a single Exact settlement. Prefer when comparing candidates, picking the cheapest/most reliable, or screening Bazaar search hits before paying any of them.
compare_tools · Compare several x402 tools before choosing which to pay. Alias of preflight_batch: returns each URL's verdict, priceUsd, payTo, uptimePct, and drift history so you can pick reliable/cheap candidates and skip avoid. Charged per URL.

What "online" means: the server answered an MCP connection at the time of the check. It is not a guarantee of security, quality or continuous uptime. How we test: we open an MCP session and ask for the tool list, as an AI assistant would. We never run a tool and never send a key. Checked every few days. Method

Is this your server? Monitoring Pro: a check every 30 minutes and an email within the hour when it stops answering. Launch offer: $39.99 once, for life.

Facts & evidence

Each fact shows where it was seen and when.

Fact	Value	Evidence	Source	Last confirmed
Install package	x402check-mcp	DECLARED	SRC-001 Official MCP Registry	4h ago
Version	0.1.1	DECLARED	SRC-001 Official MCP Registry	4h ago
Hosted endpoint	https://x402check.dev/mcp	DECLARED	SRC-001 Official MCP Registry	4h ago
Package registries	npm	DECLARED	SRC-001 Official MCP Registry	4h ago
Local install (package)	yes	DECLARED	SRC-001 Official MCP Registry	4h ago
Remote access (hosted)	yes	DECLARED	SRC-001 Official MCP Registry	4h ago
Website	https://x402check.dev	DECLARED	SRC-001 Official MCP Registry	4h ago
Registry status	active	DECLARED	SRC-001 Official MCP Registry	4h ago
MCP server	yes	DECLARED	SRC-001 Official MCP Registry	4h ago

Change history

VERSION31 Oct 2026
0.1.0 → 0.1.1
NEW31 Oct 2026
first seen in the index

Is this page accurate?

Flag it and our robot re-checks the official source. Reports never change a score.

Is mcp still online?

Free alerts · no account▲ 0

Do you run mcp? Know when it stops answering

For publishers · optional

Its hosted endpoint can be monitored. Monitoring Pro connects every 30 minutes like an AI assistant, emails you within the hour when it stops answering, keeps a 90-day availability history and adds your answer rate to your badge.

Monitor mcpLaunch offer $39.99 once, for life instead of $9.99/month · All plans

Monitoring never changes a score or a rank.

Questions about mcp

How do I connect mcp?

Use the hosted endpoint https://x402check.dev/mcp in your assistant's MCP settings. The exact settings are in "How to connect" above, as declared in the Official MCP Registry.

Does mcp need an API key or token?

Yes. The registry entry lists a required value: X402CHECK_URL. Get it from the publisher.

What tools does mcp offer?

When Electra Index connected on 31 Oct 2026, it listed 4 tools: preflight_check, verify_payto, preflight_batch, compare_tools. The full list is in "Live check" above.

Is mcp online?

Yes. Its hosted endpoint answered an MCP connection from Electra Index 4h ago.

mcp