fastCRW

io.github.us由 GitHub 账号 us 发布v1.0.0更新于 Nov 2, 2026

Scrape, crawl, map & search the web. Open-source, self-hostable Rust crawler & search for AI agents.

发布方自己的服务:Fastio

已验证Streamable HTTP可网页运行网页搜索与抓取知识与记忆

概览

AI 生成的概览

面向 AI 代理的远程网页抓取与搜索服务:把网址转成 Markdown 或结构化 JSON,并支持爬站、URL 映射和网页搜索。

可以做什么
  • 将单个网址抓取为 Markdown、HTML、链接、截图或按 schema 输出的 JSON
  • 在限定范围内爬取站点并收集其页面
  • 映射站点以发现 URL,而无需逐页抓取
  • 搜索网页,并可选抓取选中的结果
  • 从一个或多个网址中提取结构化字段
适用场景
适合需要把实时网页内容变成干净文本或结构化数据的场景:阅读文档页面、批量收集站点页面、发现网址,或执行网页搜索并按需抓取结果。
运行要求
通过 streamable HTTP 连接 fastcrw.com 的远程端点,需要 OAuth 登录。README 另提到本地 Rust 二进制和云端使用的 API 密钥(CRW_API_KEY),但清单未声明任何软件包或环境变量。
安装前请注意
托管服务按额度计费,提供 1000 个免费额度,托管使用会产生费用。抓取的网址与内容会发送给第三方服务;爬取和提取会访问外部站点,应遵守站点条款与访问频率限制。README 中的安装脚本和密钥处理不属于 MCP 端点本身。

安装

在 SourceWeft 中

  1. 打开 控制台中的 fastCRW,将其添加到工作区。
  2. 连接 所需的 凭据。它们会被私密存储,绝不会在公开页面上展示。
  3. 为需要使用其工具的对话启用该服务。

Web executable,通过 Streamable HTTP。 远程服务在工作区中配置后即可从网页运行时运行。

交给智能体安装

把这段提示词粘贴到 Claude Code、Codex、Cursor 等智能体,或 SourceWeft 对话中。智能体会读取该服务器的安装指南,先向你展示发布者、端点和登录方式,经你同意后再把它添加到你的客户端。密钥不会写进任何命令。

阅读 https://sourceweft.com/mcp/io.github.us%2Ffastcrw/install.md,并按其中说明把这个 MCP 服务器接入我的客户端。修改任何配置之前,先告诉我它的发布者、端点和登录方式,等我确认。不要把 API 密钥写进命令或我会提交的文件;问我密钥应从哪里获取。

查看智能体所依据的安装指南

其他 MCP 客户端

把它添加到你客户端的 mcpServers 配置中。 客户端会在首次连接时完成 OAuth 登录。

{
  "mcpServers": {
    "fastcrw": {
      "type": "http",
      "url": "https://fastcrw.com/mcp"
    }
  }
}

README

[fastCRW]

fastCRW

Turn URLs into clean markdown or structured JSON with one engine for search, scrape, map, crawl, and extract.

Run it locally as a small Rust binary or use the managed API.

Get 1000 free credits → · Install · Docs

No credit card. Continue with GitHub.

[crates.io] [PyPI] [npm crw-mcp] [CI] [License] [GitHub Stars]

One-command install

bash
curl -fsSL https://fastcrw.com/install | sh

Runs local and free, no account needed. To use the Cloud, paste your key into the same command and it installs the binary, connects the key, and registers the MCP server with the AI coding tools you already have:

bash
curl -fsSL https://fastcrw.com/install | CRW_API_KEY=crw_live_... sh
bash
crw search "rust tutorials"

Claude Code, Cursor, Codex, Gemini CLI, OpenCode and Windsurf are picked up automatically when they are already set up; nothing else is touched, and your key stays in ~/.config/crw/config.toml rather than being copied into each tool. Add CRW_NO_AGENTS=1 to skip that step, or run crw setup on its own to choose interactively.

1000 free credits, no credit card. Managed proxies, JS rendering and search, with nothing to run or keep up to date. Get my free key →

macOS and Linux, Intel and ARM. More install options →

What it does

OperationOutcome
ScrapeOne URL to markdown, HTML, links, screenshots, or schema JSON
CrawlFollow a bounded site crawl and collect its pages
MapDiscover URLs without scraping every page
SearchSearch the web and optionally scrape selected results
ExtractProduce structured fields from one or many URLs

See the full API →

Why fastCRW

On Firecrawl's own public 1,000-URL dataset, fastCRW recovered more truth than Crawl4AI and Firecrawl, matched the fastest median latency, and idled at ~14 MB RAM.

[fastCRW compared with Crawl4AI and Firecrawl on truth-recall, unique recoveries, median latency, download size, and recall depth]

Methodology, full numbers, and how to reproduce it

On a different benchmark entirely, answer accuracy rather than scrape recall, fastCRW answers 90.0% of the 600 AA-Omniscience questions correctly. Every product listed on the Artificial Analysis Search Index sits below it.

[AA-Omniscience answer accuracy. fastCRW 90.0 percent, ahead of every product on the Artificial Analysis Search Index: Firecrawl 73, Exa 70, You.com 69, Parallel 68, Tavily 64, and 38 with no search at all.]

The full 14-product comparison, the control run, and how to reproduce it

Choose how you use it

CLI

bash
crw https://example.com            # scrape, works right after installcrw search "rust async runtime"    # search, after `crw setup`

Python SDK

Using Cloud? Get an API key, then export it once:

bash
export CRW_API_KEY="crw_live_..."pip install crw
python
from crw import CrwClient
client = CrwClient()page = client.scrape("https://example.com", formats=["markdown"])
print(page["markdown"])
Node.js
bash
npm install crw-sdk
javascript
import { CrwClient } from "crw-sdk";
const client = new CrwClient();
const page = await client.scrape("https://example.com", {  formats: ["markdown"],});
console.log(page.markdown);

Local mode and more SDK examples → · REST API →

MCP for AI agents

bash
npx -y crw-mcp@latest install

Installs the CRW skill and MCP server in your detected AI tools. crw setup can also do this step, so either path is enough. Manual setup →

Choose where it runs

Managed APILocal / self-hosted
Best forZero infrastructure and managed scalingData control, private networks, or custom infrastructure
StartCreate an API key, then crw setupInstall and run crw <URL>
OperationsManaged proxies, billing, and hosted capabilitiesYou choose renderers, search, auth, proxies, and capacity

Capabilities and response shapes can differ by deployment: /v1/capabilities · response shapes

Self-hosting guide →

Learn more

Contributing

The workspace requires Rust 1.85 or newer:

bash
git clone https://github.com/fastcrw/crwcd crwmake check-fast

Read the contributor guide →

Contributors

crw is better because of these people. Thank you, all of you:

[us] [paoloantinori] [behramcelen] [rqi14] [santhreal] [AsheTheWings] [gjija] [adambenhassen] [atirna] [cdebled] [VIVAAN-DHAWAN] [alkaz-nodemaven] [mj520]

Engine and MCP server: AGPL-3.0. Python and TypeScript SDKs: MIT. Embedding license: [email protected].

Star History

[Star History Chart]

Please respect website policies. Crawl and map follow robots.txt by default.

来源:README.md,提交 147c8d6

工具

0
该服务器需要登录,因此 SourceWeft 无法在没有账号的情况下读取其工具,也未收录。已连接账号所能看到的内容可能因账号及其权限而异。

版本历史

1
  1. v1.0.0最新Sep 16, 2026

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