Diffbot API
Applies AI-powered extraction to any web page to return structured data (articles, products, people, companies, discussions) and provides a knowledge graph of 1 billion+ entities with relationships derived from the public web.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
Token in query param is a security concern as it appears in access logs. Processes public web data; extracted content may contain PII from web pages. No key scoping available.
⚡ Reliability
Best When
You need to extract structured data from arbitrary web pages at scale without building and maintaining custom scrapers per site.
Avoid When
You need to access authenticated content, need sub-second extraction latency, or require certified data provenance for compliance purposes.
Use Cases
- • Extract structured article content (title, author, date, body text, images) from any news URL without custom scraper maintenance
- • Query the Diffbot Knowledge Graph for a company entity to retrieve funding rounds, employees, competitors, and news in one API call
- • Crawl a competitor's product catalog pages and extract structured product data (name, price, specs, images) at scale
- • Use the NLP API to extract entities, sentiment, and topics from raw text for document classification or tagging pipelines
- • Monitor a set of web pages for content changes and extract updated structured data on a schedule for a competitive intelligence agent
Not For
- • Scraping pages behind authentication or paywalls — Diffbot processes publicly accessible URLs only
- • Real-time streaming web data at sub-minute latency — extraction latency is typically seconds per URL
- • Legal or regulatory data requiring certified source provenance — Diffbot derives data from the public web without chain of custody
Interface
Authentication
API token passed as a query parameter `token=YOUR_TOKEN` on all requests. Token is obtained from the Diffbot dashboard.
Pricing
Free trial is generous for evaluation but time-limited. Knowledge Graph queries are typically a separate higher-tier add-on.
Agent Metadata
Known Gotchas
- ⚠ JavaScript-heavy single-page applications may extract poorly or return empty fields — Diffbot uses a headless browser but JS rendering adds latency and is not 100% reliable
- ⚠ Extraction latency varies from 1-30+ seconds depending on page complexity and target server speed — agents must use async patterns or generous timeouts
- ⚠ Knowledge Graph entity searches return confidence scores; low-confidence entities may contain incorrect relationship data
- ⚠ The Crawl API is asynchronous — agents must poll for completion or use webhooks; synchronous crawl assumptions will break
- ⚠ API token in query string is logged in server access logs and HTTP referrer headers — treat as sensitive credential despite query param placement
Alternatives
Full Evaluation Report
Detailed scoring breakdown, competitive positioning, security analysis, and improvement recommendations for Diffbot API.
Scores are editorial opinions as of 2026-03-06.