fastCRW

io.github.usPublished by GitHub account usv1.0.0Updated Nov 2, 2026

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

The publisher's own server: Fastio

VerifiedStreamable HTTPWeb executableWeb Search & ScrapingKnowledge & Memory

Overview

AI-generated overview

Remote web scraping and search service for AI agents: turn URLs into markdown or structured JSON, crawl sites, map URLs and run web searches.

What you can do
  • Scrape a single URL into markdown, HTML, links, screenshots or schema-based JSON
  • Crawl a site within bounds and collect its pages
  • Map a site to discover URLs without scraping every page
  • Search the web and optionally scrape selected results
  • Extract structured fields from one or many URLs
When to use it
Useful when an assistant needs live web content as clean text or structured data: reading documentation pages, gathering pages from a site, discovering URLs, or running web searches with optional scraping.
Requirements
Remote endpoint at fastcrw.com over streamable HTTP with OAuth sign-in required. The README also describes a local Rust binary and a managed API key (CRW_API_KEY) for cloud use, but the manifest declares no packages or environment variables.
Before you install
The hosted service is credit-based, with 1000 free credits offered and billing for managed use. Scraped content and URLs are sent to a third-party service, and crawl or extract operations act on external sites, so respect site terms and rate limits. The README's install script and API key handling are outside the MCP endpoint itself.

Installation

In SourceWeft

  1. Open fastCRW in the dashboard and add it to a workspace.
  2. Connect the required credentials. They are stored privately and never shown on public pages.
  3. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/io.github.us%2Ffastcrw/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config. The client completes OAuth sign-in on first connect.

{
  "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.

Source: README.md at commit 147c8d6

Tools

0
This server asks you to sign in, so SourceWeft could not read its tools without an account and has not indexed them. What a connected account sees can depend on that account and its permissions.

Version history

1
  1. v1.0.0LatestSep 16, 2026

Score

85% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listed15 pts

    Answer tools/list without a credential, or ship a package that starts in a sandbox without one.

  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts
  • License10 pts

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