Dify Web Scraping Integration — fastCRW [Firecrawl-Compatible]

Why Dify + fastCRW

Dify is the no-code platform for building LLM applications, agents, and knowledge bases. It sits between GPT and your data, orchestrating prompts, tools, and retrieval. The friction point is web scraping — Dify's knowledge base can ingest files and text, but pulling live web data requires hand-written Python or external tools. fastCRW fits inside Dify through the standard HTTP Request node or a native Dify plugin, turning any Dify workflow into a live web scraper. The 6.6 MB RAM fastCRW runtime is lightweight enough to run locally if you self-host Dify, and the Firecrawl-compatible API means workflows built on Firecrawl port to fastCRW with one URL change.

Setup: HTTP Request Method

The simplest path is the built-in HTTP Request node. No plugin installation needed.

1. Open your Dify workflow or agent.
2. Add a Tool node and select HTTP Request.
3. Set the method to POST and URL to https://fastcrw.com/api/v1/scrape.
4. Create a secret variable for your fastCRW API key: go to Settings → Variables and add a secret named FASTCRW_API_KEY.
5. Add a Header with key Authorization and value Bearer {{ env.FASTCRW_API_KEY }} (or Bearer {{ secret.FASTCRW_API_KEY }} depending on your Dify version).
6. Set Body Type to JSON and configure the request payload.

You can now test the node by passing a URL and calling fastCRW.

Setup: Native Dify Plugin

For a visual, form-based experience:

1. Open your Dify workspace.
2. Go to Tools → Plugin Marketplace (or your self-hosted plugin directory).
3. Search for fastCRW or navigate to the fastCRW plugin.
4. Click Install and authenticate with your fastCRW API key.
5. The plugin adds a fastCRW tool to your workflow builder.
6. In any workflow, add the fastCRW tool and select your operation: Scrape, Search, Crawl, or Map.

The plugin abstracts away HTTP headers and JSON payloads, surfacing parameters as form fields.

Code Example: HTTP Request Node

Here's a Dify workflow configuration using the HTTP Request node:

{
  "method": "POST",
  "url": "https://fastcrw.com/api/v1/scrape",
  "headers": {
    "Authorization": "Bearer {{ env.FASTCRW_API_KEY }}",
    "Content-Type": "application/json"
  },
  "body": {
    "url": "{{ workflow_variable.target_url }}",
    "formats": ["markdown"],
    "timeout": 30
  }
}

In the Dify editor, connect this node after a Trigger or Code node that provides target_url. The HTTP node will return:

{
  "success": true,
  "data": {
    "url": "https://example.com",
    "markdown": "# Page Title\n\nContent here...",
    "metadata": {
      "title": "Page Title",
      "description": "..."
    }
  }
}

Pipe the data.markdown output into downstream nodes for text splitting, embeddings, or LLM processing.

Example Workflow: Web Scraping RAG

A typical Dify workflow combining fastCRW, text processing, and knowledge base sync:

1. Trigger node: Accept a user input (URL or search query).
2. HTTP Request node (fastCRW Scrape): POST to https://fastcrw.com/api/v1/scrape with the user's URL. Fetch markdown.
3. Text Splitter node: Break the markdown into chunks (512–1024 tokens).
4. Knowledge Base Write node: Sync the chunks into a Dify knowledge base collection.
5. End node: Return success message.

This workflow enables self-serve document ingestion — users submit any URL and Dify automatically scrapes, chunks, and indexes it for RAG.

For a more advanced use case with Dify AI agents:

1. Agent Start node: Define fastCRW Scrape and fastCRW Search as available tools.
2. LLM node: The agent's reasoning loop.
3. When the agent decides it needs web data, it calls the fastCRW tool automatically.
4. Agent End node: Return the agent's final response.

The agent can reason over live web data without explicit workflow steps — it orchestrates fastCRW calls on the fly.

Dify Plugin Repository

The fastCRW Dify plugin is maintained in the crw-saas monorepo under /dify-plugin-crw/. It provides:

• A Scrape tool that wraps fastcrw.com/api/v1/scrape with parameter dropdowns for format selection.
• A Search tool for web search combined with scrape (query + limit).
• A Crawl tool for spidering (max depth, max pages).
• A Map tool for discovering URLs on a domain (sitemap parsing + crawling).

Install the plugin once, then use any of these tools in any Dify workflow without manually writing HTTP requests.

When to Use This

• No-code RAG ingestion — let non-technical users scrape any URL into a Dify knowledge base.
• Dify agent web browsing — give your Dify AI agent a scraping tool so it can fetch live data during reasoning.
• Knowledge base auto-sync — schedule a Dify workflow to periodically scrape and update a knowledge base.
• Competitive monitoring — build a Dify agent that scrapes competitor pricing pages and summarizes changes.
• Content aggregation — scrape multiple sources and feed them into a Dify summarization workflow.

Troubleshooting

"Authorization header missing" Make sure your HTTP Request node includes the Authorization: Bearer fcrw_... header. If using an env variable, verify it's set in Dify's Settings → Variables and the syntax is correct for your Dify version.

"Request timeout" fastCRW's default timeout is 30 seconds. For large pages, increase the timeout in the HTTP node body: "timeout": 60. Or switch to async crawl mode with polling.

"Knowledge base write failed" Dify's knowledge base expects text chunks with metadata. Make sure the HTTP node output is piped to a Text Splitter before the knowledge base write node.

"Plugin not found in marketplace" If the fastCRW plugin is not in your Dify marketplace, you're on a self-hosted instance without plugin discovery enabled. Install manually by cloning the plugin from /dify-plugin-crw/ and placing it in your Dify plugins directory, then restart Dify.

"Rate limit exceeded" fastCRW applies rate limits per API key. If you hit a 429 error, slow down your request rate or upgrade to a higher-tier plan for more credits.

When to Choose fastCRW

• Speed: fastCRW is 5.5x faster than Firecrawl for most pages, and the lightweight HTTP interface fits naturally into Dify workflows.
• Self-hosting: fastCRW's single-binary design runs on a VPS, Raspberry Pi, or inside your Dify container without Redis or PostgreSQL.
• MCP compatibility: If you're also using Claude Code or other MCP-compatible tools, fastCRW provides a unified scraping endpoint.
• Cost: fastCRW's consumption-based pricing and local deployment model mean lower TCO for heavy scraping workloads.
• Firecrawl migration: Dify workflows built on Firecrawl's HTTP API port to fastCRW by changing the domain and adding a Bearer token.

Related

• n8n integration
• Make integration
• Claude Code integration
• fastCRW scrape docs
• fastCRW search docs
• Dify knowledge base documentation
• Dify plugin development