docs: add CRW integration (provider + document loader pages)

Author: us

packages.yml

@@ -796,3 +796,7 @@ packages:
   js: "@oracle/langchain-oracledb"
   downloads: 64000
   downloads_updated_at: "2026-04-20T00:14:41.475493+00:00"
+- name: langchain-crw
+  repo: us/langchain-crw
+  downloads: 0
+  downloads_updated_at: "2026-04-22T00:00:00+00:00"

src/oss/python/integrations/document_loaders/crw.mdx

@@ -0,0 +1,110 @@
+---
+title: "CRW integration"
+description: "Integrate with the CRW document loader using LangChain Python."
+---
+
+[CRW](https://github.com/us/crw) is an open-source, Firecrawl-compatible web
+scraper written in Rust. It ships as a single binary, runs with zero config in
+subprocess mode, and returns clean markdown, HTML, or JSON. Works self-hosted
+or via the [fastcrw.com](https://fastcrw.com) cloud API.
+
+## Overview
+
+### Integration details
+
+| Class | Package | Local | Serializable |
+| :--- | :--- | :---: | :---: |
+| `CrwLoader` | `langchain-crw` | ✅ | ❌ |
+
+### Loader features
+
+| Source | Document Lazy Loading | Native Async Support |
+| :---: | :---: | :---: |
+| `CrwLoader` | ✅ | ❌ |
+
+## Setup
+
+```bash
+pip install langchain-crw
+```
+
+No server required — the SDK spawns the `crw` binary as a local subprocess on
+first use. For cloud mode, get an API key at [fastcrw.com](https://fastcrw.com).
+
+## Usage
+
+### Scrape a single page
+
+```python
+from langchain_crw import CrwLoader
+
+loader = CrwLoader(url="https://example.com", mode="scrape")
+docs = loader.load()
+
+print(docs[0].page_content)   # clean markdown
+print(docs[0].metadata)       # {'title': ..., 'sourceURL': ..., 'statusCode': 200}
+```
+
+### Cloud mode (fastcrw.com)
+
+```python
+loader = CrwLoader(
+    url="https://example.com",
+    mode="scrape",
+    api_url="https://fastcrw.com/api",
+    api_key="YOUR_API_KEY",  # or CRW_API_KEY env var
+)
+docs = loader.load()
+```
+
+### Self-hosted server
+
+```python
+loader = CrwLoader(url="https://example.com", api_url="http://localhost:3000")
+docs = loader.load()
+```
+
+## Modes
+
+- `scrape`: Scrape a single URL and return markdown.
+- `crawl`: Crawl a URL and all accessible sub-pages.
+- `map`: Discover URLs on a site via sitemap and link extraction.
+- `search`: Web search plus content scraping (cloud only).
+
+### Crawl
+
+```python
+loader = CrwLoader(
+    url="https://docs.example.com",
+    mode="crawl",
+    params={"max_depth": 3, "max_pages": 50},
+)
+docs = loader.load()
+```
+
+### Map
+
+```python
+loader = CrwLoader(url="https://example.com", mode="map")
+urls = [doc.page_content for doc in loader.load()]
+```
+
+### JS rendering
+
+```python
+loader = CrwLoader(
+    url="https://spa-app.example.com",
+    mode="scrape",
+    params={
+        "render_js": True,
+        "wait_for": 3000,
+        "css_selector": "article.main-content",
+    },
+)
+docs = loader.load()
+```
+
+## API reference
+
+For full configuration options, see the
+[`langchain-crw` README](https://github.com/us/langchain-crw).

src/oss/python/integrations/providers/crw.mdx

@@ -0,0 +1,31 @@
+---
+title: "CRW integrations"
+description: "Integrate with CRW using LangChain Python."
+---
+
+>[CRW](https://github.com/us/crw) is an open-source, Firecrawl-compatible web
+> scraper written in Rust. It ships as a single ~6 MB binary, runs self-hosted
+> or via the [fastcrw.com](https://fastcrw.com) cloud API, and returns clean
+> LLM-ready markdown, HTML, or structured JSON.
+
+## Installation and setup
+
+Install the partner integration package:
+
+<CodeGroup>
+```bash pip
+pip install langchain-crw
+```
+
+```bash uv
+uv add langchain-crw
+```
+</CodeGroup>
+
+## Document loader
+
+See a [usage example](/oss/integrations/document_loaders/crw).
+
+```python
+from langchain_crw import CrwLoader
+```