X402check MCP

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

• Connection: Computer or cloud
• Transport: stdio, Streamable HTTP
• Category: Other
• You need to fill in: X402CHECK_URL

Install

Pick the AI app you use, then copy the settings.

You need

• Runs in the cloudNothing to install; it connects over the internet
• npmNode.js installed (for the npx command)

Which app do you use?

https://x402check.dev/mcp

{
  "mcpServers": {
    "x402check": {
      "command": "npx",
      "args": [
        "-y",
        "x402check-mcp"
      ],
      "env": {
        "X402CHECK_URL": "your-value"
      }
    }
  }
}

claude mcp add --transport http x402check https://x402check.dev/mcp

claude mcp add x402check --env X402CHECK_URL=your-value -- npx -y x402check-mcp

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

{
  "mcpServers": {
    "x402check": {
      "command": "npx",
      "args": [
        "-y",
        "x402check-mcp"
      ],
      "env": {
        "X402CHECK_URL": "your-value"
      }
    }
  }
}

{
  "servers": {
    "x402check": {
      "type": "http",
      "url": "https://x402check.dev/mcp"
    }
  }
}

{
  "servers": {
    "x402check": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "x402check-mcp"
      ],
      "env": {
        "X402CHECK_URL": "your-value"
      }
    }
  }
}

https://x402check.dev/mcp

Your choice stays on this device in a cookie; no account needed.

Values you fill in

• X402CHECK_URL required env
  Origin of the deployed x402check worker (https://x402check.dev)

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Tool names and descriptions exactly as the server reported them on Nov 6, 2026. The maker wrote them, not us; we show them as plain text.

• preflight_check

  Preflight an x402 seller URL before settle / PAYMENT-SIGNATURE. Pass the absolute https seller URL. Returns verdict ok|caution|avoid plus that tool's history only (uptime, payToChanges, priceChanges). Use when: about to pay any x402 endpoint; asking is this API a scam; is this en

• 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, comparing payTo to an allowlist, or dete

• preflight_batch

  Trust-check up to 25 x402 seller URLs in one request. Charged per URL (N × unit) in a single Exact settlement via MCP _meta payment. 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 via MCP x402 payment.

• deep_check

  Deeper trust check before paying an x402 endpoint ($0.05 Exact USDC). Runs the same live 402 + history as preflight_check, then repeated probes for payTo/price consistency, a recent public Base USDC-to-payTo transfer sample, Bazaar + 402 Index listing checks, and drift vs last KV

• watch_tool

  Subscribe to daily re-checks of one x402 seller URL for 30 days. Alerts your webhook and/or email when payTo, price, network, or availability changes. Fixed $5 USDC Exact (not per-check). Optional after a one-shot preflight when you will revisit the same seller.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 7, 2026

• ! Caution

  Maker matches the repo

  The registry lists no source repo, so we cannot match the publisher (x402check.dev) to the code

• … Not checked yet

  Still maintained

  We have not read this repo from GitHub yet

• … Not checked yet

  Has a licence

  We have not read this repo from GitHub yet

• ✓ Pass

  Endpoint responds

  Responded in 226 ms (HTTP 200)

• – Not applicable

  Sign-in with OAuth

  No sign-in needed

• ✓ Pass

  No hidden instructions in tool descriptions

  Read 6 tool descriptions and found no hidden instructions to the AI

Compared with others in Otheri

• More stars than 0% of the other 32661 servers in this category
• Published to the registry more recently than 88% of the other 32661 servers in this category
• Basic checks equal to or better than 37% of the other 32661 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

README from the maker

No README found in the repo