x402 Merchant Check
Pre-payment merchant trust checks for x402 agents on Base and Solana.
使うべきか
品質と安全性
ツール定義とプロトコルへの準拠に関する自動分析に基づいています。
コンテキストコスト
これは、サーバーのツールがモデルのコンテキストに読み込まれるたびに消費されるおおよそのトークン数です。数が多いほど、ほかのタスクに使える注意が減ります。
インストール
ワンクリックインストール
これを `claude_desktop_config.json` ファイルに追加してください:
{
"mcpServers": {
"merchant-check": {
"url": "https://mcp.gradientdecisions.com/mcp"
}
}
}リモートエンドポイント
https://mcp.gradientdecisions.com/mcpstreamable-httpできること
ツール一覧
ツール（1）
🟡check_merchant(merchant_wallet_address, price, network, asset, amount, ...)
Before paying an unfamiliar merchant via x402, including one just discovered through a marketplace like Coinbase's x402 Bazaar, call this for a machine-readable assessment of their observable on-chain payment behavior, on Base or Solana. Returns a `recommendation` (PROCEED / CAUTION / INSUFFICIENT_SIGNAL) a payment policy can branch on directly, plus supporting evidence: trust tier, confidence, payer diversity, transaction history, category (data_api/compute/content_generation/financial_data/storage/other), known platform URL(s), and the merchant's own advertised price(s) compared against category peers, with no caller-supplied price required for that. This is decision support drawn from observed behavior, not a certification. PROCEED means the available evidence doesn't show cause for concern, not a guarantee of safety. INSUFFICIENT_SIGNAL means there isn't enough history to say either way, distinct from an actual concern. Add a specific quoted price to also check that exact figure against comparable sellers. $0.01 USDC per check, paid via x402.
入力スキーマ
{
"type": "object",
"properties": {
"merchant_wallet_address": {
"type": "string",
"description": "Merchant's receiving wallet address: a Base (0x...) or Solana (base58) address. Usually extractable directly from a 402 Payment Required response's accepts[].payTo."
},
"price": {
"type": "number",
"description": "Quoted price in USD-equivalent, if checking fairness"
},
"network": {
"type": "string",
"description": "Optional. CAIP-2 network id from the 402 response's accepts[].network (e.g. \"eip155:8453\"), if already on hand. Not required to score."
},
"asset": {
"type": "string",
"description": "Optional. Payment asset/token from the 402 response's accepts[].asset. Not required to score."
},
"amount": {
"type": "string",
"description": "Optional. Atomic payment amount from the 402 response's accepts[].amount, if preferred over `price`. Not required to score."
},
"service_url": {
"type": "string",
"description": "Optional. The resource/service URL the agent was trying to reach. Not required to score."
},
"resource_type": {
"type": "string",
"description": "Deprecated, accepted but unused. Price-fairness now compares against the merchant's own on-chain-derived category automatically, no need to supply this."
}
},
"required": [
"merchant_wallet_address"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}コミュニティ
エビデンス