exhibit402-mcp
exhibit402-mcp
面向 exhibit402 的 MCP 服务器,exhibit402 是一个基于 x402 付费的实时网页证据服务。它让代理在 Base 上支付 USDC,以永久认证某个公共 URL 当前提供的内容,并重新验证现有证书。
捕获的工作原理:两个位于不同网络的独立观察者在同一冻结瞬间捕获该 URL。字节完全相同的捕获获得 CERTIFIED 级别。存在差异的捕获获得 WITNESSED 级别,并附带像素一致百分比和差异图。无论哪种情况,证据(截图加签名清单)都会永久存储在 Arweave 上,包含 RFC 3161 时间戳令牌,并向付款钱包在 Base 上铸造 ERC-721 证书。
机器可读的服务文档:/llms.txt 和 /openapi.json。
工具
工具 | 功能 | 价格(Base 上的 USDC) |
| 支付捕获费用,然后轮询认领票据,直到证书最终确定(最多约 6 分钟)。返回证书 JSON:级别、令牌 ID、ar:// 链接、哈希。 | $1.00( |
| 重新验证任何 exhibit402 证书:服务重新下载存储的字节,重新计算每个 SHA-256,并检查链上记录。返回机器可读的判定。 | $0.02 |
如果 certify_url 达到轮询超时,它仍会返回 claim_url。认领票据是持久的且免费读取:稍后使用普通 GET 获取认领 URL 即可收集完成的证书。您不会被重复收费。
退款政策(由服务披露):被拒绝的捕获(过大、页面不可达、内容截屏)自动退款,扣除 $0.10 费用;服务故障全额退款。WITNESSED 是可交付成果,而非失败,不予退款。
Related MCP server: VERITY
设置
您需要一个环境变量:
EXHIBIT402_WALLET_KEY:持有 Base(链 ID 8453)上 USDC 的钱包的 EVM 私钥(十六进制)。钱包不需要 ETH;x402 通过 EIP-3009 结算,促进者支付 gas。密钥保留在您的进程环境中,绝不会被记录。
没有密钥,服务器仍会启动并列出其工具,每次调用都会返回明确的设置错误,而不是静默失败。
Claude Code(一行)
claude mcp add exhibit402 --env EXHIBIT402_WALLET_KEY=0xYOUR_KEY -- npx -y exhibit402-mcpClaude Desktop
添加到 claude_desktop_config.json:
{
"mcpServers": {
"exhibit402": {
"command": "npx",
"args": ["-y", "exhibit402-mcp"],
"env": { "EXHIBIT402_WALLET_KEY": "0xYOUR_KEY" }
}
}
}Cursor
添加到 .cursor/mcp.json:
{
"mcpServers": {
"exhibit402": {
"command": "npx",
"args": ["-y", "exhibit402-mcp"],
"env": { "EXHIBIT402_WALLET_KEY": "0xYOUR_KEY" }
}
}
}价格摘要
操作 | 价格 |
整页捕获 | $1.00 |
视口捕获(1280x800) | $0.50 |
验证证书 | $0.02 |
被拒绝捕获的退款费用 | 保留 $0.10,其余退款 |
所有支付均为 x402(Base 上的 USDC,eip155:8453)。支付在捕获开始前结算;轮询认领票据免费。
给运营者的说明
EXHIBIT402_URL覆盖服务基础 URL(默认https://exhibit402.dylan-caponi.workers.dev)。您通常不需要它。履约通常需要 30 到 120 秒,冷观察者或重试轮次时最长约 5 分钟。
verify_certificate返回verified: false判定是已交付的结果,会被收费。格式错误的 ID、未知 ID 和网关中断不收费。服务在支付前拒绝私有和内部地址。
许可证
MIT
Maintenance
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