Link Preview Cache API

io.github.cmondillo由 GitHub 帳號 cmondillo 發布v1.0.0更新於 Nov 1, 2026

Same link preview data as link-preview-api, ~1/3 the price via a shared cache.

已驗證Streamable HTTP可網頁執行網頁搜尋與抓取金融

概覽

AI 產生的概覽

遠端 MCP 工具，抓取公開網址的 Open Graph 與 meta 中繼資料，依次以 Base 上的 USDC 付費，資料來自共用快取。

可以做什麼
  • 抓取公開網址的連結預覽中繼資料：Open Graph 標籤、標題、描述與圖片。
  • 回傳與價格較高的 link-preview 服務相同的預覽資料，由共用快取提供，價格約為其三分之一。
  • 內嵌付款流程：呼叫先回傳 HTTP 402 報價，代理支付幾美分 USDC 後自動回傳結果。
適用情境
適合助理需要快速取得公開網址的連結預覽或頁面中繼資料，且工作流程能以 USDC 自動支付小額單次費用的情境。在可接受快取結果時，比全價連結預覽服務更便宜。
執行需求
遠端 streamable HTTP 端點；未宣告本機安裝、帳號、API 金鑰或標頭。需要能在 Base 主網支付 USDC 的錢包，因為每次呼叫透過 x402 付款流程花費 0.003 USDC。需要能存取該端點及付款網路。
安裝前請注意
每次呼叫都會花真錢：在 Base 主網上每次預覽 0.003 USDC，由代理自動支付。付款需要有錢包餘額並簽署 x402 付款，應控制消費上限並妥善保管錢包金鑰。被預覽的網址會傳送給第三方服務，且結果來自共用快取，可能已過期。

安裝

在 SourceWeft 中

  1. 開啟 儀表板中的 Link Preview Cache API，將其新增到工作區。
  2. 為需要使用其工具的對話啟用該服務。

Web executable，透過 Streamable HTTP。 遠端服務在工作區中設定後即可從網頁執行環境執行。

交給代理程式安裝

把這段提示詞貼上到 Claude Code、Codex、Cursor 等代理程式，或 SourceWeft 對話中。代理程式會讀取該伺服器的安裝指南，先向你展示發布者、端點和登入方式，經你同意後再把它新增到你的客戶端。金鑰不會寫進任何命令。

閱讀 https://sourceweft.com/mcp/io.github.cmondillo%2Flink-preview-cache-api/install.md，並按其中說明把這個 MCP 伺服器接入我的客戶端。修改任何設定之前，先告訴我它的發布者、端點和登入方式，等我確認。不要把 API 金鑰寫進命令或我會提交的檔案；問我金鑰應從哪裡取得。

檢視代理程式所依據的安裝指南

其他 MCP 客戶端

把它新增到你客戶端的 mcpServers 設定中。

{
  "mcpServers": {
    "link-preview-cache-api": {
      "type": "http",
      "url": "https://link-preview-cache-api.onrender.com/mcp"
    }
  }
}

README

tools

A portfolio of small, single-purpose paid services sold directly to AI agents — no human checkout flow, no dashboard login, no subscription. An agent calls the API, gets an HTTP 402 Payment Required quote, pays a few cents in USDC, and gets its answer. Fully automatic on both sides.

Each service lives in its own self-contained folder under projects/ and follows the same pattern:

  • One narrow problem, solved well. No platforms, no suites — a single job an agent needs done.
  • x402 for payment. HTTP-native, stablecoin micropayments, no merchant account or KYC required on the seller side — just a wallet address. This is the emerging standard for agent-to-API payments (backed by Coinbase, adopted by AWS Bedrock AgentCore, Cloudflare, and others as of 2026).
  • Discoverable by agents, not just humans — each API declares an x402 Bazaar discovery schema so agents can find and call it without a human ever reading the docs.
  • A sample automation client included with every project, showing an agent discovering, paying for, and consuming the service end-to-end.
  • Where it adds real reach, also sold as an MCP tool (api/app/mcp_server.py) — the same product, the same price, a second interface for coding agents that discover tools over MCP rather than raw HTTP.

Projects

ProjectWhat it sellsStatus
link-preview-apiPay-per-call URL metadata (Open Graph/title/description/image) extractionLive on Base mainnet, earning real USDC: https://link-preview-api-z4nf.onrender.com
content-moderation-apiPay-per-call profanity/explicit-content detection with redaction, sold over both HTTP and MCPLive on Base mainnet, earning real USDC: https://content-moderation-api-hhy1.onrender.com
link-preview-cache-apiSame product as link-preview-api, ~⅓ the price — backed by a shared cache. First instance of a general "x402 cache" patternLive on Base mainnet, earning real USDC: https://link-preview-cache-api.onrender.com

Repo conventions

  • Every project is fully self-contained in projects/<project-slug>/: its own code, tests, Dockerfile, deploy config, and README. Nothing product-specific is shared between projects.
  • Every project ships with:
    • api/ — the paid service itself
    • automation-client/ — a sample agent that pays for and consumes it
    • deploy/ — ready-to-use deploy configs (Render/Fly/etc.)
    • README.md — the business case, architecture, and exact steps to take it from "runs on my machine" to "earning money"
    • LISTING.md — the marketplace/directory listing copy, ready to publish
  • New projects get added the same way: a clean new folder, same skeleton, linked in the table above.
  • One deliberate exception to "nothing shared": scripts/ holds portfolio-level publishing tooling — not product code, reused across every project the same way (e.g. submitting a new tool to x402-list.com's API). See PUBLISHING.md for the full playbook: what's genuinely automatic, what's scripted, and what stays a deliberate manual step and why.

來源：README.md，提交 876f8ce

工具

1

preview_url

Fetch Open Graph / meta metadata for a public URL. Costs $0.003 USDC on Base.

輸入參數url必填

版本歷史

1
  1. v1.0.0最新Sep 16, 2026

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