Pyfetcher

fetchkit

Agentic web infrastructure for autonomous fetching, scraping, and content acquisition.

Give AI agents the power to fetch, scrape, extract, and download anything on the web -- with realistic browser fingerprints, structured outputs, and a full crawl-scrape-download pipeline backed by Postgres and MinIO.

[](https://pypi.org/project/fetchkit/) [](https://pypi.org/project/fetchkit/) [](https://pr1m8.github.io/pyfetcher/) [](https://github.com/pr1m8/pyfetcher/actions/workflows/ci.yml) [](https://github.com/pr1m8/pyfetcher/blob/main/LICENSE) [](https://github.com/astral-sh/ruff) [](https://pdm-project.org) [](#development) [](#mcp-server-ai-agent-integration)

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[MCP Server](#mcp-server-ai-agent-integration) | [Quick Start](#quick-start) | [Pipeline](#pipeline) | [CLI](#cli) | Documentation | [Examples](examples/)

Why fetchkit?

The problem: AI agents need to interact with the web -- fetch pages, extract data, download files -- but existing tools aren't designed for autonomous operation. They lack structured outputs, realistic browser fingerprints, and pipeline orchestration.

fetchkit solves this by providing:

1. MCP Server -- 16 tools that any AI agent (Claude, LangChain, LangGraph) can call directly. Structured Pydantic outputs, not raw HTML.
2. Realistic browser identity -- 11 profiles with consistent UA + Client Hints + Sec-Fetch-\* headers. TLS fingerprinting via curl_cffi. Cloudflare bypass.
3. Full pipeline -- Event-driven crawl -> scrape -> download backed by Postgres job queues and MinIO object storage.
4. Deep downloader integration -- yt-dlp and gallery-dl Python APIs with progress hooks and metadata extraction.

pip install 'fetchkit[mcp]'     # AI agent integration
pip install 'fetchkit[full]'    # Everything

Highlights

pip install fetchkit                   # Core: fetch, scrape, headers
pip install 'fetchkit[mcp]'            # + MCP server for AI agents
pip install 'fetchkit[pipeline]'       # + Postgres job queue + MinIO storage
pip install 'fetchkit[full]'           # Everything including yt-dlp, Playwright, etc.

Fetch with realistic browser headers

from pyfetcher import fetch

response = fetch("https://example.com")
print(response.status_code, response.ok)
# Sends Chrome-like headers with Client Hints, Sec-Fetch-*, UA rotation automatically

Scrape anything

from pyfetcher.scrape import extract_links, extract_text, extract_readable_text

links = extract_links(html, base_url="https://example.com")  # all links with internal/external tags
titles = extract_text(html, "h1")                             # CSS selector extraction
article = extract_readable_text(html)                         # strips scripts, nav, ads

4 HTTP backends -- pick the right one for the job

from pyfetcher import FetchRequest, fetch

response = fetch("https://example.com")                                        # httpx (default, HTTP/2)
response = fetch(FetchRequest(url="https://example.com", backend="aiohttp"))   # aiohttp (pure async)
response = fetch(FetchRequest(url="https://example.com", backend="curl_cffi")) # TLS fingerprinting
response = fetch(FetchRequest(url="https://example.com", backend="cloudscraper")) # Cloudflare bypass

Download media with yt-dlp & gallery-dl

from pyfetcher.downloaders.ytdlp import YtdlpDownloader
from pyfetcher.downloaders.gallerydl import GalleryDlDownloader

# Video/audio with progress tracking
yt = YtdlpDownloader()
info = await yt.extract_info("https://youtube.com/watch?v=...")    # metadata only
results = await yt.download("https://youtube.com/watch?v=...",     # full download
    output_dir="./media", progress_callback=lambda p: print(p.status))

# Image galleries (170+ supported sites)
gdl = GalleryDlDownloader()
results = await gdl.download("https://imgur.com/gallery/...", output_dir="./images")

MCP Server -- give AI agents web superpowers

pyfetcher-mcp                  # stdio for Claude Desktop / Claude Code
pyfetcher-mcp --http 8000      # HTTP for LangChain / remote agents

# LangChain integration
from langchain_mcp_adapters import MultiServerMCPClient
client = MultiServerMCPClient({"pyfetcher": {"transport": "http", "url": "http://localhost:8000/mcp"}})
tools = await client.get_tools()  # 16 structured tools ready for any agent

Features

Core Library

| Feature | Description | | ------------------- | ----------------------------------------------------------------------------------------------------------------------------------------- | | Browser Headers | 11 profiles (Chrome/Firefox/Safari/Edge) across 5 platforms. Consistent UA + Client Hints + Sec-Fetch-\*. Market-share-weighted rotation. | | 4 Backends | httpx (default, HTTP/2), aiohttp (async), curl_cffi (TLS fingerprint), cloudscraper (CF bypass) | | Rate Limiting | Per-domain + global token bucket with configurable burst | | Retry | Exponential backoff via Tenacity with configurable status codes | | Scraping | CSS selectors, link harvesting, form parsing, table extraction | | Metadata | HTML meta, Open Graph, JSON-LD, microdata, RDFa, Dublin Core | | CLI | pyfetcher fetch, scrape, headers, user-agent, robots, download | | TUI | Interactive Textual terminal UI for building and inspecting requests |

Infrastructure (optional extras)

| Feature | Extra | Description | | ---------------- | --------------- | --------------------------------------------------------------------------- | | Pipeline | [pipeline] | Event-driven Crawl -> Scrape -> Download via Postgres LISTEN/NOTIFY | | Database | [db] | SQLAlchemy 2.0 async + Alembic. Jobs, pages, media, hosts, feeds, URL dedup | | Object Store | [store] | MinIO/S3 via aioboto3. Upload, download, presigned URLs | | Downloaders | [downloaders] | yt-dlp (progress hooks, info_dict) + gallery-dl (170+ sites) | | Extractors | [extractors] | trafilatura + readability-lxml fallback, html2text, markdownify | | Media | [media] | Audio (mutagen), video (pymediainfo), image (exifread), PDF (pypdf) | | Browser | [browser] | Playwright + stealth for JS-heavy sites | | Feeds | [feeds] | RSS/Atom monitoring with adaptive polling | | Crawler | [pipeline] | URL frontier, spider + router, dedup, politeness, sitemap discovery |

Installation

pip install fetchkit

All optional extras:

pip install 'fetchkit[tui]'            # Textual TUI
pip install 'fetchkit[curl]'           # curl_cffi TLS fingerprinting
pip install 'fetchkit[cloudscraper]'   # Cloudflare bypass
pip install 'fetchkit[db]'             # Postgres + SQLAlchemy + Alembic
pip install 'fetchkit[store]'          # MinIO/S3 object storage
pip install 'fetchkit[pipeline]'       # db + store (full pipeline)
pip install 'fetchkit[downloaders]'    # yt-dlp + gallery-dl
pip install 'fetchkit[extractors]'     # trafilatura, readability, html2text
pip install 'fetchkit[media]'          # Audio/video/image/PDF metadata
pip install 'fetchkit[browser]'        # Playwright + stealth
pip install 'fetchkit[feeds]'          # RSS/Atom feed parsing
pip install 'fetchkit[full]'           # Everything

Quick Start

Fetch

from pyfetcher import fetch, afetch, FetchRequest
import asyncio

# Sync
response = fetch("https://example.com")
print(response.status_code, response.ok)

# Async
response = asyncio.run(afetch("https://example.com"))

Browser Profiles & Headers

from pyfetcher.headers.browser import BrowserHeaderProvider
from pyfetcher.headers.rotating import RotatingHeaderProvider
from pyfetcher.headers.ua import random_user_agent
from pyfetcher.fetch.service import FetchService

# Fixed profile (Chrome on Windows)
service = FetchService(header_provider=BrowserHeaderProvider("chrome_win"))

# Rotating profiles weighted by real-world market share
service = FetchService(header_provider=RotatingHeaderProvider())

# Just need a user-agent string?
ua = random_user_agent(browser="firefox", platform="macOS")

Scraping

from pyfetcher.scrape import (
    extract_links, extract_text, extract_table,
    extract_forms, extract_readable_text,
)
from pyfetcher.scrape.robots import parse_robots_txt, is_allowed

# CSS selectors
titles = extract_text(html, "h1.title")
rows = extract_table(html, "table.data")

# Links with internal/external classification
links = extract_links(html, base_url=url, same_domain_only=True)

# Forms with field extraction
forms = extract_forms(html, base_url=url)
print(forms[0].action, forms[0].to_dict())

# Robots.txt
rules = parse_robots_txt(robots_content)
allowed = is_allowed(rules, "/admin", user_agent="MyBot")

Rate-Limited Fetching

from pyfetcher.fetch.service import FetchService
from pyfetcher.ratelimit.limiter import DomainRateLimiter, RateLimitPolicy

limiter = DomainRateLimiter(
    default_policy=RateLimitPolicy(requests_per_second=2.0, burst=5),
    domain_policies={
        "api.example.com": RateLimitPolicy(requests_per_second=0.5),
    },
)
service = FetchService(rate_limiter=limiter)

Content Extraction

from pyfetcher.extractors.content import extract_article_text
from pyfetcher.extractors.convert import html_to_markdown, html_to_plaintext

# Article text (trafilatura with readability-lxml fallback)
article = extract_article_text(html, url="https://example.com/post")

# HTML -> Markdown
md = html_to_markdown(html)

yt-dlp & gallery-dl

from pyfetcher.downloaders.ytdlp import YtdlpDownloader
from pyfetcher.downloaders.gallerydl import GalleryDlDownloader

# yt-dlp with progress tracking
yt = YtdlpDownloader()
info = await yt.extract_info("https://youtube.com/watch?v=dQw4w9WgXcQ")
results = await yt.download(url, output_dir="./videos",
    progress_callback=lambda p: print(f"{p.status}: {p.percent}"))

# gallery-dl for image galleries (170+ supported sites)
gdl = GalleryDlDownloader()
results = await gdl.download("https://imgur.com/gallery/...", output_dir="./images")

CLI

# Fetch with any backend
pyfetcher fetch https://example.com
pyfetcher fetch https://example.com -o json -b curl_cffi

# Preview generated headers
pyfetcher headers --profile chrome_win
pyfetcher headers --browser firefox -o json
pyfetcher headers --list

# Scrape content
pyfetcher scrape https://example.com --css "h1"
pyfetcher scrape https://example.com --links -o json
pyfetcher scrape https://example.com --text
pyfetcher scrape https://example.com --meta

# Random user-agents
pyfetcher user-agent --browser chrome --count 5
pyfetcher user-agent --mobile

# Check robots.txt
pyfetcher robots https://example.com -p /admin

# Download files
pyfetcher download https://example.com/file.pdf ./file.pdf

Pipeline

The event-driven pipeline connects three stages via Postgres LISTEN/NOTIFY:

Seeds / RSS / Sitemap
       |
  [Crawl Stage]  ──NOTIFY──>  [Scrape Stage]  ──NOTIFY──>  [Download Stage]
       |                             |                             |
       v                             v                             v
  pages table                 pages (enriched)              media_assets
  + new crawl jobs            + download jobs               + MinIO objects

Setup

make infra-up     # Start Postgres + MinIO
make migrate      # Run Alembic migrations
make pipeline     # Start all workers

Programmatic

from pyfetcher.pipeline.runner import PipelineRunner
from pyfetcher.config import PyfetcherConfig

runner = PipelineRunner(PyfetcherConfig(
    crawl_concurrency=10,
    scrape_concurrency=20,
    download_concurrency=5,
))
await runner.start()

Custom Spiders

from pyfetcher.crawler.spider import Spider, SpiderResult

spider = Spider(name="my-spider")

@spider.router.add(r"/blog/\d{4}/")
async def handle_post(url, response):
    return SpiderResult(
        discovered_urls=[...],
        items=[{"title": "...", "content": "..."}],
    )

MCP Server (AI Agent Integration)

fetchkit ships as an MCP server, making all its capabilities available to AI agents (Claude, LangChain, LangGraph, and any MCP-compatible client). This turns fetchkit into autonomous agentic infrastructure -- LLMs can fetch, scrape, extract, and download without custom code.

Why MCP?

Traditional scraping requires writing code for every site. With fetchkit's MCP server, an AI agent can:

• Autonomously research topics by fetching pages, extracting content, and following links
• Audit websites by checking metadata, robots.txt, sitemaps, and page structure
• Extract structured data from any page using CSS selectors, table parsing, or article extraction
• Download media with progress tracking and checksum verification
• Generate realistic requests using browser profiles that pass bot detection

All 16 tools return structured Pydantic models so the LLM gets clean, typed data -- not raw HTML.

Quick Start

pip install 'fetchkit[mcp]'

# Run as stdio server (Claude Desktop / Claude Code)
pyfetcher-mcp

# Run as HTTP server (LangChain / remote agents)
pyfetcher-mcp --http 8000

# Or via Makefile
make mcp          # stdio
make mcp-http     # HTTP on port 8000

Available Tools (16)

| Tool | What it does | | ------------------- | ------------------------------------------------------------------ | | fetch_url | Fetch any URL with browser headers, returns status + body + timing | | fetch_multiple | Batch fetch with concurrency control | | scrape_css | Extract content via CSS selectors | | scrape_links | Harvest links with internal/external classification | | scrape_text | Extract readable text (strips scripts, nav, etc.) | | scrape_metadata | Title, description, Open Graph, favicons | | scrape_forms | Parse forms with fields and default values | | scrape_table | Extract HTML table data as rows | | check_robots | Check robots.txt rules for any path | | parse_sitemap | Parse XML sitemaps | | generate_headers | Preview full browser header sets | | list_profiles | Show all 11 browser profiles | | random_user_agent | Generate random realistic UAs | | extract_article | Article text + markdown via trafilatura | | convert_html | HTML -> markdown or plaintext

…

Source & license

This open-source MCP server is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: pr1m8
• Source: pr1m8/pyfetcher
• License: MIT
• Homepage: https://pr1m8.github.io/pyfetcher/

Install and usage instructions live in the source repository linked above.