mcp

dev.x402check/mcpVersion 0.1.6

Preflight before paying any x402 tool (ok|caution|avoid + history). 1 free/wallet; then $0.01 Base.

Status

Responds250 msNov 14, 2026, 14:29 UTCAnswered our handshake without sign-in.

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Last checked: Nov 14, 2026, 14:29 UTC
Latency: 250 ms
Remotes responding: 1 of 1
Sign-in: No sign-in
Hosting: Hosted outside the EU (detected)
Registry data as of: Nov 14, 2026, 21:12 UTC

Data from the official MCP Registry, checked by run.zero. How we check

Connect

Streamable HTTP

https://x402check.dev/mcpResponds250 msNov 14, 2026, 14:29 UTC

No sign-in

Claude Code

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

Claude Desktop and claude.ai

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Settings > Connectors > Add custom connector
Name: x402check
Remote MCP server URL: https://x402check.dev/mcp

Cursor

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

VS Code

code --add-mcp '{"name":"x402check","type":"http","url":"https://x402check.dev/mcp"}'

Streamable HTTP

npm: x402check-mcp 0.1.6

Package only

npm (npx)

claude mcp add x402check -e 'X402CHECK_URL=<YOUR_X402CHECK_URL>' -- npx -y x402check-mcp@0.1.6

Replace <YOUR_X402CHECK_URL> before running.

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Tools

6 tools

Tools of mcp
	Description		Read-only	Idempotent	Open world
`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.	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.	No	No	No	Yes
`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 history. Does not claim OFAC or wallet simulation. Optional when the base check is not enough signal.	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 history. Does not claim OFAC or wallet simulation. Optional when the base check is not enough signal.	No	No	No	Yes
`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.	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.	No	No	No	Yes
`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 endpoint safe or legit; debugging a failing 402; checking uptime; validating payment requirements before signing USDC on Base. Do not pay if verdict=avoid. Charged $0.01 per URL via x402 Exact on this MCP tools/call (params._meta['x402/payment']).	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 endpoint safe or legit; debugging a failing 402; checking uptime; validating payment requirements before signing USDC on Base. Do not pay if verdict=avoid. Charged $0.01 per URL via x402 Exact on this MCP tools/call (params._meta['x402/payment']).	No	No	No	Yes
`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 detecting a rug-style wallet swap. Charged per URL via MCP x402 payment.	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 detecting a rug-style wallet swap. Charged per URL via MCP x402 payment.	No	No	No	Yes
`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.	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.	No	No	No	Yes

Details

Registry status: Active
Published: Nov 2, 2026
Updated: Nov 2, 2026
Website: https://x402check.dev/⁠ (opens in a new tab)
Repository: Not given
Categories (suggested): Finance and paymentsSuggested categories are assigned automatically from the registry text and may be wrong. Verified operators can correct them.
GDPR: Not declared

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