mcp

Mandatory check 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-SIGNATURE; 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']).

{
  "type": "object",
  "properties": {
    "url": {
      "type": "string",
      "description": "Absolute https URL of the x402 seller endpoint (the resource you are about to pay)"
    },
    "fresh": {
      "type": "boolean",
      "description": "Force a live probe; ignore cache"
    }
  },
  "required": [
    "url"
  ]
}

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.

{
  "type": "object",
  "properties": {
    "url": {
      "type": "string",
      "description": "Absolute https URL of the x402 seller endpoint (the resource you are about to pay)"
    },
    "fresh": {
      "type": "boolean",
      "description": "Force a live probe; ignore cache"
    }
  },
  "required": [
    "url"
  ]
}

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.

{
  "type": "object",
  "properties": {
    "urls": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "minItems": 1,
      "maxItems": 25,
      "description": "Absolute https seller URLs; billed per item"
    },
    "fresh": {
      "type": "boolean"
    }
  },
  "required": [
    "urls"
  ]
}

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.

{
  "type": "object",
  "properties": {
    "urls": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "minItems": 1,
      "maxItems": 25,
      "description": "Candidate seller URLs to compare"
    },
    "fresh": {
      "type": "boolean"
    }
  },
  "required": [
    "urls"
  ]
}

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.

{
  "type": "object",
  "properties": {
    "url": {
      "type": "string",
      "description": "Absolute https URL of the x402 seller endpoint (the resource you are about to pay)"
    }
  },
  "required": [
    "url"
  ]
}

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.

{
  "type": "object",
  "properties": {
    "url": {
      "type": "string",
      "description": "Absolute https URL of the x402 seller endpoint (the resource you are about to pay)"
    },
    "webhookUrl": {
      "type": "string",
      "description": "https URL that receives POST JSON alerts on change"
    },
    "email": {
      "type": "string",
      "description": "Optional email for change alerts via Resend (also set webhookUrl if you want an HTTPS webhook)"
    }
  },
  "required": [
    "url"
  ]
}