Massi
I'm Massi, also known online as 0xMassi. I build web extraction infrastructure in Rust, focused on the problem of getting clean, reliable web data into language models and AI agents.
My work lives at the intersection of three hard problems: getting through the defenses that block automated requests, high-throughput content extraction (Rust, async, zero-copy), and LLM tooling (MCP, structured extraction, RAG pipelines). webclaw is where I ship that work as open source.
Before webclaw, I spent years writing iOS apps, backend services, and developer tooling. I've shipped native apps to the App Store, run production APIs, and maintained Rust crates used by other developers.
What I go deep on.
- Rust systems programming
- Web content extraction
- Reliable access to bot-protected sites
- HTTP/2 protocol internals
- Extracting clean content from pages that block plain requests
- Model Context Protocol (MCP) server design
- Retrieval augmented generation (RAG) pipelines
- LLM tooling and agent infrastructure
Things I've shipped.
webclaw
2.3k starsWeb extraction engine for LLMs
Rust-based web extraction engine. 118ms on static pages, no cold start. Ships as CLI, MCP server, and hosted API with SDKs for TypeScript, Python, and Go.
Stik
246 starsQuick-capture notes for macOS
Free, open-source quick-capture note app for Mac. Press ⌘⇧S from anywhere, a floating post-it appears, type your thought, and you're back to work in under 3 seconds. Plain markdown files, on-device AI, no cloud. Built with Tauri and Rust.
Akari
500+ membersTicket broker platform
Community and toolkit for independent ticket brokers. Real-time market monitoring across 50+ platforms, browser extension for fast checkout, P&L dashboard, and a 500+ member community. Powered 200k+ tickets secured in 2024.
Writing & research.
URL Extractor Guide: How to Pull Clean Data from Any Page
A hands-on url extractor guide covering JS-rendered pages, anti-bot bypass, batching, schema output, and LLM-ready context for AI pipelines.
How to Convert Website to Text with a Web API
Learn how to convert website to text with an API workflow, including JavaScript, Python, Go, crawling, batching, proxies, and fixes.
URL to Text: A Practical Guide for 2026
Learn how to convert any URL to text with JS, Python, and CLI examples. This url to text guide covers formats, best practices, and troubleshooting.
Web to Text: A Practical Guide to Clean, LLM-Ready
Web to text - Learn how to convert web pages to text for LLMs. This guide covers clean extraction techniques, tools, and best practices
Webpage to Markdown: The 2026 Guide for Easy Conversion
Learn how to convert any webpage to markdown quickly with our 2026 guide. Simplify content saving and editing today.
URL to Markdown: The Ultimate Guide for 2026
Learn how to convert any url to markdown with top tools like Webclaw, pandoc, and html2text. Compare real examples and choose the best for LLM use.
Web Scraping Proxy Guide for AI Pipelines in 2026
A technical guide to choosing and configuring a web scraping proxy for AI pipelines, covering types, rotation, costs, and integration with extraction APIs.
YouTube Transcript Extractor: A Developer's 2026 Guide
Build a YouTube transcript extractor in 2026. Covers JS, Python, and CLI workflows, cleaning output for LLMs, batching, and troubleshooting blocked pages.
429 Error: Rate Limits, Backoff & Scraping Fixes
Understand a 429 error message, learn rate-limit backoff strategies, and get practical fixes for web scraping and API calls in 2026.
What Is a CAPTCHA Solver and How It Works in 2026
What is a CAPTCHA solver? Learn how solvers detect, solve, and submit tokens, the architectures behind them, and how to integrate one into your scraping stack.
The 2026 MCP Server List: 10 Essential Resources
Find the best options in our curated MCP server list for 2026. Discover public, community, and self-hostable servers for your AI agents and pipelines.
Agent Tools Explained: Building Reliable AI Toolchains
Learn what agent tools are, how they work in modern AI systems, and how to build reliable toolchains with Webclaw integration.
7 Awesome MCP Servers to Connect Your AI in 2026
Discover the 7 most awesome MCP servers in 2026. Connect your AI agent to tools from GitHub, Google, Slack, and more with our curated list and setup guide.
MCP Servers Explained: How They Work and When to Use Them
Learn what MCP servers are, how they work under the hood, real-world use cases, security risks, and how to choose one for your AI agents.
Sitecrawler Alternatives: Top 10 Web Scraping APIs 2026
Looking for Sitecrawler alternatives? Explore the 10 best web scraping APIs for AI workflows, reliability, and developer experience in 2026.
Top Selenium Alternatives for 2026: A Full Guide
Explore top Selenium alternatives for 2026. This guide compares Playwright, Puppeteer, Cypress, and Webclaw for testing, scraping, and AI data extraction.
The 10 Best Octoparse Alternative Tools for 2026
Searching for an Octoparse alternative? We review the 10 best web scraping tools for 2026, from no-code GUIs to developer APIs for tough sites.
10 Best Apify Alternative Tools for 2026
Looking for an Apify alternative? Explore our 2026 list of the 10 best web scraping tools, comparing features, pricing, and AI/LLM use cases.
Open Source Web Crawler Guide for 2026
Open source web crawler tools compared for 2026. Learn architectures, AI integration tips, anti-bot challenges, and how to pick the right crawler.
How to Choose a Web Crawler Tool in 2026
Find the right web crawler tool for AI pipelines in 2026. Compare crawlers vs scrapers, key features, and how Webclaw delivers clean, model-ready output.
Website Crawler: How It Works & Why It Matters
A website crawler fetches pages and follows links to build an index. Learn how crawlers work, why some fail, and how to use one in 2026.
How to Crawl Website in 2026: A Stress-Free Guide
Crawl website - Learn how to crawl a website in 2026 with tips on configuration, JS rendering, and handling anti-bot measures
Top 10 Open Source Web Scraper Tools for 2026
Explore the 10 best open source web scraper tools for 2026. Compare Scrapy, Playwright, Crawlee & more for data pipelines and AI/LLM applications.
AI Web Scraping Guide for Modern Data Extraction
Master AI web scraping to build reliable extraction pipelines. Learn how semantic understanding and LLM-ready outputs transform data collection in 2026.
10 Best Web Scraping Tools for 2026: An Expert Guide
Find the best web scraping tools for any project in 2026. Our expert review covers 10 top APIs, frameworks, and browsers for data extraction and AI.
Scraper API Explained: How It Works and When to Use One
Learn what a scraper API is, how it handles rendering and anti-bot defenses, and how to choose the right one for AI pipelines and data workflows.
Web Scraper API Guide: What It Is and How to Choose
Learn how a web scraper API works, what to look for, and how to pick one that returns clean, token-efficient data for AI and LLM pipelines.
Web Scraping API: The 2026 Developer's Guide
Learn what a web scraping API is, core features, architectures, use cases, and how to choose the right provider for AI and data workflows in 2026.
10 Best AI Web Scraper APIs for 2026
Discover the 10 best ai web scraper APIs of 2026, with feature comparisons, pricing, integrations, and code snippets—plus Webclaw examples.
What Is an AI Scraper? a Guide for Developers (2026)
Discover what an AI scraper is, how it beats traditional methods for bot detection and JS rendering, and why it's essential for RAG and AI agents.
AI Web Scraper: Architectures, Tools, & Best Practices 2026
Explore AI web scraper architectures. Compare AI vs. traditional scraping, learn integration, evaluation, and tools with practical examples.
Link to Text Converter: The Definitive 2026 Guide for AI
A complete guide to using a link to text converter for AI. Learn how to extract clean, LLM-ready content from any URL, even those with bot protection.
Build a Job Board Scraper: A Production-Ready Guide
Learn how to build a production-ready job board scraper with Webclaw. This guide covers architecture, anti-bot bypass, structured data, scaling, and LLM prep.
YouTube Transcript Scraper: A 2026 Developer's Guide
Build a YouTube transcript scraper with methods for developers. From Python libraries to managed APIs, learn to extract clean transcript data for AI pipelines.
Website Change Monitoring Tool: A 2026 Developer Guide
Discover how a website change monitoring tool works, key features to evaluate, and how to implement one for compliance, SEO, and AI data pipelines in 2026.
A Practical Guide to Duplicate Detection in 2026
A dev's guide to duplicate detection for AI and web scraping. Learn algorithms, scaling strategies, and how to handle exact, near, and semantic duplicates.
10 Best Site Mapping Tools for Developers in 2026
Find the best site mapping tools for developers and engineers. Compare 10 top crawlers and APIs for technical SEO, UX design, and AI data extraction.
Web Scraping with Go: A 2026 Guide to Building Scrapers
Learn web scraping with Go in 2026. This guide covers Colly, Goquery, and Chromedp, plus handling JS, proxies, and bot protection for reliable data.
Bearer Token Authentication: 2026 Guide to Security
Master bearer token authentication in 2026. Explore its lifecycle, JWTs, security best practices, and REST API integration in this comprehensive guide.
A Modern Python Scraping Tutorial for 2026
The only Python scraping tutorial you'll need. Go from basic setup to advanced techniques for handling JavaScript, proxies, and preparing data for AI.
Master Web Scraping in Python: 2026 Guide
Learn modern web scraping in Python. Cover requests, JavaScript, bypassing blocks, & getting LLM-ready data.
Amazon Scrape API: A Guide to Building Reliable Pipelines
Learn to build a reliable Amazon scrape API pipeline. This guide covers anti-scraping, ASIN extraction, LLM-optimized JSON output, and scaling.
CSV vs JSON: Which Format to Choose in 2026
Choosing between CSV vs JSON for your data? This guide compares structure, performance, LLM token efficiency, and use cases to help you decide.
Residential Backconnect Proxy: Ultimate Guide 2026
Uncover how a residential backconnect proxy works for web scraping & geo-targeting. Find providers that defeat modern behavioral blocks in 2026. Get started
Amazon Scraping API: A Developer's Guide for 2026
A complete guide to using an Amazon scraping API in 2026. Learn to handle anti-bot measures, extract structured data, and integrate with your applications.
XPath Contains Text: Syntax & Best Practices
Xpath contains text - Master XPath `contains text` for reliable web scraping. Covers syntax, pitfalls (whitespace, case-sensitivity), & alternatives
Proxies for Google: A Developer's Guide for 2026
A developer-focused guide on using proxies for Google scraping. Learn to choose residential vs. datacenter proxies, manage rotation, and bypass blocks in 2026.
Text Extractor from Website: A 2026 Practical Guide
Need a text extractor from website that handles modern JS sites and bot blocking? This guide shows how to get clean, LLM-ready text using Python or an API.
Optimize Your Proxy for Downloads Performance
Choose and configure a proxy for downloads. This guide covers residential vs. datacenter options, performance, and large file handling for reliable data
Residential Proxies for Self-Hosted webclaw Scraping
Route self-hosted webclaw scrapes through ColdProxy residential proxies with rotation and geo-targeting. Setup, pool files, and crawl commands.
Web Search API: The 2026 Guide for AI Developers
Explore what a web search API is in 2026. Learn about architectures, features, and how to integrate one for AI agents, RAG, and clean data extraction.
Downloading HTML Files: From Browser to API in 2026
Learn modern methods for downloading HTML files. This guide covers browser saving, curl/wget, headless browsers for JS, and APIs for developers and AI.
R Programming Web Scraping: The 2026 Practical Guide
Master R programming web scraping. This guide covers rvest, dynamic sites with RSelenium, anti-scraping, and how to build reliable data pipelines for AI.
Playwright vs Puppeteer: The 2026 Developer's Guide
Playwright vs Puppeteer: Which to choose in 2026? A technical guide on performance, APIs, and when to use a scraping API like Webclaw instead.
Undetectable Internet Browser: Web Scraping & Compliance
Discover what an undetectable internet browser is. Learn about browser fingerprinting, legitimate web scraping, and how to stay compliant in 2026.
Python Load JSON File
Learn to python load json file efficiently. Covers basic loading, large files, performance, error checking, and schema validation with practical examples.
Web Scraping in R: A Practical 2026 Guide
Learn modern web scraping in R. This guide covers rvest for static sites, RSelenium for JavaScript, and APIs for tough targets. Start scraping data today.
Advanced Crawling in Python: Techniques for 2026
Crawling in python - Master Python crawling: requests, Scrapy, Playwright, anti-bot, data extraction, & AI scaling in 2026. Build production-grade web scrapers
Curl POST JSON: A Practical Guide for Developers
Master how to curl post json data. This guide covers sending inline and file-based JSON, auth, headers, and the modern --json flag with practical examples.
Scraping Websites for Data: A 2026 Developer's Guide
Learn how scraping websites for data works in 2026. This guide covers planning, JS rendering, bypassing bots, and creating clean, LLM-ready data pipelines.
Batch vs Stream Processing: Which One Your Pipeline Needs
Discover what is batch processing, its role compared to streaming, and why it's a critical pattern for efficient data pipelines, web scraping, and AI in 2026.
What Is Screen Scraping: Understanding Its Risks & AI Uses
Discover what is screen scraping, how it works, its legal risks, and comparisons to modern APIs & web scraping for AI in 2026.
How to Scrape a Website for Emails (the 2026 Guide)
Scraping a website for emails in 2026 is contact discovery plus data-quality control, not regex on a homepage. How to crawl, render, extract, validate, and use email data responsibly.
Competitor Price Tracking: A Developer's Guide 2026
Competitor price tracking is a production data pipeline, not a dashboard. How to collect, normalize, match, and act on competitor price data without making the wrong pricing call.
Bypassing Web Blocks: Expert Strategies for 2026
Bypassing web blocks in 2026 is an architecture decision, not a single trick. When raw HTTP is enough, when you need a headless browser, and when to buy a scraping API.
How to Convert HTML to Markdown: The Complete 2026 Guide
Convert HTML to Markdown the right way: Pandoc for local files, Turndown and markdownify in code, and a URL-to-Markdown API for JavaScript-rendered pages.
Apify Alternative for LLM Web Scraping and AI Agents
Compare Apify actors, the Apify marketplace, and Webclaw for any-URL markdown extraction, structured JSON, crawling, MCP access, and AI agent web tooling.
Bright Data Alternative for LLM Web Scraping
Compare Bright Data, Web Unlocker, and Webclaw for proxy infrastructure, markdown extraction, structured JSON, crawling, batching, and AI agent workflows.
r.jina.ai Reader: Where It Shines and Where It Breaks
Jina Reader breaks on Cloudflare and DataDome. Same r.jina.ai-style URL to markdown, plus crawling, batching, and anti-bot bypass that returns content.
Crawl4AI vs Playwright: Which to Use for Scraping (2026)
Crawl4AI vs Playwright for web scraping: which one to pick, where each breaks, and when you need neither. Markdown output, browser control, RAG input.
Render JavaScript Pages: When You Need a Browser, When Not
Most pages do not need a headless browser. How to detect an empty React shell, when a JavaScript rendering API is worth it, and how to skip the slow path.
Anti-Bot Scraping API 2026: signals that force browser fallback
The exact block markers, JA4 fingerprints, empty shells, anti-bot cookies, JavaScript heuristics, and content-quality signals that decide when a scraping API should escalate to a browser.
Anti-Bot Scraping API: Skip the Browser, Keep the Speed
An anti-bot scraping API that detects the block first, then escalates to a browser only when needed. Faster and cheaper, with clean markdown or JSON out.
How to evaluate web scraping APIs for AI agents
A practical checklist for testing web scraping APIs on real agent and RAG workflows, not toy URLs like example.com.
Migrating from Firecrawl: compatible API for AI agents
Already using Firecrawl? Learn how Firecrawl-compatible endpoints work, what to test before switching, and how to evaluate webclaw with your existing scrape and crawl calls.
Cloudflare Scraping Checklist: Diagnose the Block in 2026
A checklist for Cloudflare scraping failures. What to log, what each signal means, and when to change fingerprint, session, rate limit, or render in a browser.
JA4 Fingerprints Decoded: Format, Bot Score, curl 403s
Cloudflare fingerprints your TLS and HTTP/2 handshake with JA3 and JA4 — that is why curl gets 403 and Chrome gets 200 on the same request. How browser-grade clients flip the result.
Cloudflare Error 1020, 1015, 403, 503: Causes and Fixes
Cloudflare 403, 503, 1020, 1015 each mean a different block. A decision tree to read the code, find the failing layer, and fix it. Includes error 1020.
Puppeteer Stealth vs Cloudflare: Which Evasions Still Fail
puppeteer-extra-plugin-stealth still gets caught by Cloudflare in 2026. The network, request, and session signals that give it away, and what to run instead.
Cloudflare Turnstile: How It Works and What Bypasses It
How Cloudflare Turnstile works in 2026 and what actually bypasses it. The four signals that decide pass or block: TLS, HTTP/2, token, session. No solver hype.
LlamaIndex Web Scraping: Fix SimpleWebPageReader
LlamaIndex web scraping fails on blocks, empty shells, and noisy HTML. Feed cleaner markdown into RAG pipelines and agents.
LangChain web scraping in 2026: what loaders can't do
LangChain's built-in loaders break on bot-protected sites and return raw HTML your LLM can't use. Here's how to get clean, reliable web data into any LangChain pipeline.
How to Scrape Google Search Results: 5 Ways and the Rules
Google killed plain HTTP to search results. 5 ways that still work in 2026: TLS fingerprinting, headless browsers, SERP APIs. Code examples for each.
The 6 best web scraping APIs for LLMs in 2026
If you're building with LLMs, you need web data. Here's how the main scraping APIs compare on the things that actually matter for AI use cases.
Bypass Cloudflare Bot Protection: No Headless Browser
Fix the four signals Cloudflare checks before you reach for a headless browser: TLS, HTTP/2, challenge, session. Why proxy and user-agent rotation alone fails.
Extract structured data from any URL in one call
You don't always need the full page. Sometimes you need three fields from a product listing. Here's how to pull exactly the data you want from any URL.
Build a RAG pipeline with live web data (4 steps)
Most RAG tutorials stop at "upload a PDF." Real apps need live web data. Here's how to build a pipeline that fetches, extracts, and indexes pages.
MCP web scraping for Claude Code and Cursor
MCP web scraping gives Claude Code, Cursor, and AI agents live web access. Scrape, crawl, search, extract, and summarize from one server.
HTML to Markdown for LLMs and RAG
Convert HTML to Markdown for LLMs with boilerplate removed, links preserved, and cleaner RAG input for agents and summarization.
Web scraping for AI agents: 3 hidden problems
Most scraping tools were built for data pipelines, not AI agents. Three things quietly break your pipeline and how to fix them.
Why I built webclaw (Rust scraper for LLMs)
I was tired of scrapers that return 403 or need headless Chrome for basic HTML. So I built one in Rust that actually works.
Build on what I build. Start with webclaw.
The fastest web extraction engine for LLMs and agents. Open source, built in Rust. Cancel anytime.