natural language to dag scraping pipeline compilation
Converts natural language extraction requirements into directed acyclic graphs (DAGs) of processing nodes without requiring CSS selectors or XPath expressions. The system parses user intent, constructs a node execution plan, and orchestrates LLM calls across a pipeline where each node reads from and writes to a shared state dictionary, enabling declarative scraping workflows that adapt to page structure changes automatically.
Unique: Uses graph-based node orchestration with shared state dictionaries instead of imperative scraping scripts, allowing LLM-driven extraction logic to be composed as reusable, chainable processing units (FetchNode → ParseNode → GenerateAnswerNode) that automatically coordinate across 20+ LLM providers
vs alternatives: Eliminates selector maintenance burden that plagues traditional scrapers (BeautifulSoup, Selenium) by delegating structure understanding to LLMs, while offering more control than no-code platforms through composable node graphs and custom node creation
multi-provider llm backend abstraction with unified interface
Provides a unified abstraction layer supporting 20+ LLM providers (OpenAI, Anthropic, Google, AWS Bedrock, Ollama, Nvidia, etc.) through a common interface, enabling users to swap providers without changing scraping logic. The system handles provider-specific API differences, token counting, model selection, and fallback strategies through a pluggable model registry that maps provider names to concrete LLM implementations.
Unique: Implements a pluggable model registry pattern where each LLM provider (ChatOpenAI, ChatOllama, ChatAnthropic, etc.) inherits from a common base, allowing provider-agnostic node implementations that discover and instantiate the correct LLM backend at runtime based on configuration
vs alternatives: More flexible than LangChain's LLM abstraction because it's tailored specifically for scraping workflows and includes provider-specific optimizations (e.g., token counting for cost estimation), while simpler than building custom provider integrations
multi-modal content processing with image and audio handling
Processes multi-modal content including images and audio through specialized nodes (ImageToTextNode, TextToSpeechNode) that convert between modalities. Images are converted to text descriptions via vision LLMs, enabling extraction from visual content. Audio is converted to text via speech-to-text, enabling scraping of audio content. This allows scraping workflows to handle rich media content alongside text.
Unique: Implements multi-modal processing as composable nodes (ImageToTextNode, TextToSpeechNode) that integrate vision and audio LLMs into scraping DAGs, enabling extraction from rich media without separate processing pipelines
vs alternatives: More integrated than separate vision/audio tools because multi-modal processing is a first-class node type, while more flexible than vision-only solutions because it handles audio and text together
schema-based output validation and transformation
Validates and transforms extracted data against user-defined schemas (JSON Schema, Pydantic models, dataclasses) to ensure output conforms to expected structure and types. The system uses schema_transform utilities to map LLM outputs to typed structures, handle type coercion, and validate constraints. This ensures downstream systems receive data in the expected format with type safety.
Unique: Implements schema-based validation through schema_transform utilities that map LLM outputs to typed structures (Pydantic, dataclasses) with automatic type coercion and constraint validation, ensuring type safety without manual parsing
vs alternatives: More type-safe than untyped dict outputs because schema validation is built-in, while more flexible than rigid schema systems because it supports multiple schema formats (JSON Schema, Pydantic, dataclasses)
prompt engineering and llm behavior customization
Enables fine-grained control over LLM behavior through prompt templates, system messages, and configuration parameters (temperature, max_tokens, top_p, etc.). Users can customize extraction logic by modifying prompts without changing code, and the system supports prompt versioning and A/B testing. This allows optimization of extraction accuracy and cost without modifying graph structure.
Unique: Exposes LLM prompts and parameters as first-class configuration in graph nodes, allowing users to customize extraction behavior through prompt templates and parameter tuning without modifying node implementations
vs alternatives: More flexible than fixed-prompt systems because prompts are customizable, while more maintainable than hardcoded prompts because templates support parameterization and versioning
error handling and fallback strategies in extraction pipelines
Provides mechanisms for handling extraction failures through fallback nodes, retry logic, and error recovery strategies. When a node fails (e.g., LLM call times out, page fetch fails), the system can automatically retry with different parameters, fall back to alternative extraction methods, or skip the node and continue with partial results. This improves robustness for large-scale scraping where some failures are inevitable.
Unique: Implements error handling as configurable node-level strategies (retry counts, backoff policies, fallback nodes) that allow graceful degradation and recovery without explicit error handling code in graph definitions
vs alternatives: More robust than fail-fast systems because fallback strategies enable partial success, while simpler than custom error handling because retry and fallback logic is built-in
flexible data acquisition with multiple browser backends
Abstracts web page fetching across four distinct backends (Playwright, Selenium, BrowserBase, Scrape.do) through a unified FetchNode interface, enabling users to choose between local browser automation, cloud-based rendering, or headless scraping based on target site requirements. The system handles JavaScript execution, dynamic content loading, and anti-bot detection transparently, with automatic fallback between backends if configured.
Unique: Implements a backend abstraction pattern where FetchNode delegates to provider-specific implementations (PlaywrightFetcher, SeleniumFetcher, BrowserBaseFetcher, ScrapedoFetcher) that handle provider-specific configuration and error handling, allowing seamless switching between local and cloud-based rendering without graph logic changes
vs alternatives: More flexible than single-backend solutions (pure Playwright or Selenium) because it enables cost-benefit tradeoffs (local vs cloud) and anti-bot evasion strategies, while more maintainable than custom multi-backend wrappers due to unified interface
format-agnostic document parsing and extraction
Processes multiple document formats (HTML, PDF, CSV, JSON, XML, Markdown) through a unified parsing pipeline that extracts structured content regardless of source format. The system uses format-specific parsers (HTML via BeautifulSoup/lxml, PDF via PyPDF2/pdfplumber, CSV via pandas, etc.) and normalizes output to a common intermediate representation that downstream LLM nodes can process uniformly.
Unique: Implements a format adapter pattern where each document type (HTML, PDF, CSV, JSON, XML, Markdown) has a dedicated parser that normalizes to a common intermediate representation, allowing downstream nodes (ParseNode, GenerateAnswerNode) to operate format-agnostically without conditional logic
vs alternatives: More comprehensive than single-format libraries (BeautifulSoup for HTML only) because it handles heterogeneous sources in one pipeline, while simpler than building custom format detection and conversion logic
+6 more capabilities