Spider Cloud
Fast and affordable cloud web crawler and scraper API built on a Rust engine that returns AI-ready Markdown output, supports JavaScript rendering, and offers credits-based pricing optimized for LLM data pipelines.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
Simple API key model with no scope controls; key rotation requires manual dashboard action.
⚡ Reliability
Best When
You need fast, cheap, AI-ready Markdown output from crawling at scale and want a managed cloud API without infrastructure overhead.
Avoid When
You need advanced anti-bot bypass, residential proxies, or fine-grained browser interaction beyond passive JS rendering.
Use Cases
- • Crawl entire websites and return clean Markdown for bulk ingestion into a vector store or RAG pipeline
- • Extract structured content from product or documentation pages for an agent research task
- • Run high-concurrency crawls of large site maps faster than Python-based crawlers at lower cost
- • Scrape search engine result pages and news sites for a content aggregation agent
- • Convert URLs to Markdown on-demand in an agent tool call without managing browser infrastructure
Not For
- • Sites requiring residential proxy rotation or sophisticated CAPTCHA solving
- • Real-time streaming of page updates — Spider is request-pull, not push
- • Agents needing to interact with pages (click, form fill) beyond JavaScript rendering
Interface
Authentication
API key passed as Authorization Bearer header. Single key per account with no scope granularity.
Pricing
Credits consumed per page crawled; JS rendering and premium features consume more credits. One of the most affordable managed crawl APIs available.
Agent Metadata
Known Gotchas
- ⚠ Credit balance must be monitored programmatically — no built-in webhook for low-credit alerts before requests start failing
- ⚠ Markdown output quality varies by site structure — heavily JS-rendered SPAs may return incomplete content
- ⚠ No built-in rate limiting per domain — agents must implement politeness delays to avoid target site bans
- ⚠ Crawl depth and page limit parameters must be set explicitly or single-URL jobs may crawl entire linked domains
- ⚠ SDK versions across Python/Node/Ruby have feature parity gaps — check language-specific docs, not just the main API reference
Alternatives
Full Evaluation Report
Detailed scoring breakdown, competitive positioning, security analysis, and improvement recommendations for Spider Cloud.
Scores are editorial opinions as of 2026-03-06.