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paid-mcp-metering

按调用次数计费的 MCP 工具。

服务发现免费:POST /mcp 遵循 Model Context Protocol 规范,采用 JSON-RPC 2.0(initializetools/listping)。执行按量计费:POST /v1/t/{tool} 位于 x402 v2 付费墙之后。未付费请求会收到 HTTP 402 及支付要求;已付费请求携带 PAYMENT-SIGNATURE 请求头,并在工具运行前通过 facilitator 完成 USDC 结算。

工具

工具

价格

返回内容

web_search

$0.001/次

按相关性排序的实时网页结果及来源 URL

deep_research

$0.01/次

多来源研究过程,返回综合答案及引用来源

上游为 Exa(主)和 Tavily(备)。每个处理器实时返回上游输出,否则直接抛出异常——绝无预置响应。

Related MCP server: Base Intel Search

支付轨道(Rails)

x402 v2、USDC、EIP-155 网络由 X402_NETWORK 指定(默认 Base Sepolia 测试网,CAIP-2 为 eip155:84532)。Facilitator 默认为 https://x402.org/facilitator

环境变量

用途

X402_PAY_TO

收款地址。结算必需;未设置时仅返回 402 支付要求

X402_NETWORK

CAIP-2 网络 ID(默认 eip155:84532

X402_FACILITATOR_URL

x402 facilitator 端点

EXA_API_KEY / TAVILY_API_KEY

搜索上游服务的凭据

运行

npm install
npm run build
npm start          # node dist/x402-server.js
npm test           # build + node --test dist/test-x402.js

免费服务发现:

curl -s localhost:4021/mcp -H 'Content-Type: application/json' \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/list"}'

付费执行:

curl -s localhost:4021/v1/t/web_search -H 'Content-Type: application/json' \
  -d '{"query":"x402 protocol","max_results":3}'
# -> 402 with payment requirements; pay via an x402 client and retry with PAYMENT-SIGNATURE

注册中心

server.json 面向官方 MCP Registry,标识为 io.github.dev55acc-ai/paid-mcp-metering。打上 v* 标签将触发 .github/workflows/publish-mcp.yml:测试、构建、npm 发布(设置了 NPM_TOKEN 时),随后通过 GitHub OIDC 认证完成注册中心发布——无需存储任何注册中心凭据。

许可证

MIT

A
license - permissive license
Not graded
quality - not tested
C
maintenance

Maintenance

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