Registry vs Spider Cloud

Side-by-side comparison of features, pricing, and ratings

Analysis reviewed Live tool data as of 2026-09-01
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At a glance

DimensionRegistrySpider Cloud
PricingFreeFreemium (pay-as-you-go from $1/GB + compute, AI Studio $6/mo add-on)
Primary FunctionAgent discovery and authenticationWeb crawling, scraping, and search API
Target UsersDevelopers building ACP-compatible clientsAI agents, RAG pipelines, LLM developers
Key IntegrationsGitHub, Zed Industries, JetBrainsLangChain, LlamaIndex, CrewAI, Google Cloud Storage, S3, Supabase, etc.
Latest MilestoneSession close/resume methods stabilized (2026-04/05)Browser AI commands, Silk AI model, Search API (2026-03)
Not ForNon-technical users, agents without auth, one-click marketplaceProjects needing vast residential proxies, simple one-off scrapes

If you need to discover ACP-compatible agents and contribute to a secure, open ecosystem, Registry is your tool — it's free and protocol-first. If you need real-time web data for AI agents or RAG pipelines, Spider Cloud offers a powerful, pay-as-you-go scraping engine with a 99.9% success rate and extensive integrations. Choose Registry for agent discovery; choose Spider Cloud for web data extraction.

Try RegistryTry Spider Cloud
Registry
Registry

Curated registry for discovering and installing authentication-gated ACP-compatible AI agents.

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Spider Cloud
Spider Cloud

AI web scraping API: crawl, scrape, search any site into markdown or JSON at 10k req/min.

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Pricing
Free
Freemium
Plans
$0/mo
$1/GB + $0.001/min compute
$40/mo (2 concurrency)
$6/mo
Popularity
5 views
7.5k views
Skill Level
Intermediate
Intermediate
API Available
Platforms
WebCLIAPI
WebAPICLI
Categories
🔌 MCP Servers & Agent Tooling
🌐 Web Scraping & Search APIs🖱️ Browser & Computer-Use Agents
Features
Curated catalog of 55+ authentication-gated agents
Programmatic access via CDN JSON endpoint
Versioned metadata for each agent listing
Optional icon support (16x16 SVG recommended)
Fork-based submission workflow on GitHub
agent.json schema for standardized submissions
Distribution info for automatic installation
Includes agents like Cursor, GitHub Copilot, Devin, Claude Agent
Includes general-purpose, DevOps, and specialized agents
Authentication requirement for all listed agents
Pull-request review for quality and compliance
Community-driven curation via GitHub
Compatibility with ACP v1 and v2 draft
Scrape any website into markdown, JSON, or raw HTML
Full-site crawling at 100K+ pages/sec
10,000 core API requests per minute default
Web Search API: SERP + scraping + extraction in one call
/ai/search endpoint with relevance gate to skip irrelevant pages
Silk AI model: HTML-to-structured data and captcha solving on GPUs
Browser Cloud: full browser sessions over CDP
AI commands (Act, Extract, Observe) via WebSocket with AI Studio
Multiple output formats: HTML, raw, plain text, markdown, JSON, JSONL, CSV, XML
Stealth browser layer and Unblocker for anti-bot sites
Proxy pool with 215M+ residential and ISP IPs across 199+ countries
Robots.txt compliance on by default, disable per-request
data_connectors parameter: pipe results to S3, GCS, Google Sheets, Azure Blob, Supabase
extraction_schema parameter: AI output conforms to JSON schema
1,000+ ready-made scraper examples across 32 categories
Integrations
GitHub
Zed Industries
JetBrains
LangChain
LlamaIndex
CrewAI
FlowiseAI
AutoGen
Agno

What real users say: Registry vs Spider Cloud

Not marketing copy and not our opinion — a structured sweep of public discussion (reviews, forums, communities and video comments), showing what people praise and what they complain about for each tool.

Registry

64 mentions across 3 sources · 30% positive — critical

Hacker News, App Store, Lemmy

What users praise

  • • Curated directory with authentication requirement enhances security.
  • • Open source on GitHub allows community contributions via pull requests.
  • • Supports a standardized protocol (ACP) for interoperability.
  • • Free to use with no pricing tiers mentioned.

What frustrates them

  • • Very limited community feedback makes it hard to evaluate.
  • • No user reviews or testimonials from actual users found.
  • • Potential confusion with other products named 'Registry'.
  • • ACP protocol may have limited ecosystem and support.

Researched Jul 3, 2026

Spider Cloud

41 mentions across 2 sources · 0% positive — critical

YouTube, Lemmy

What users praise

  • • Competitive pay-as-you-go pricing at $1/GB with no expiry.
  • • Default rate limit of 10,000 requests per minute is generous.
  • • Broad output formats (HTML, markdown, JSON, CSV) cover diverse needs.
  • • Integrated Web Search API bundles SERP and extraction for AI agents.

What frustrates them

  • • No community feedback to confirm reliability or performance.
  • • Self-reported metrics lack independent verification.
  • • Stealth browser success may vary across real sites.
  • • Potential legal risks from scraping; compliance is user's responsibility.

Researched Aug 26, 2026

Who should pick which

  • ACP client developer
    Pick: Registry

    Registry provides a standardized, authenticated agent discovery index with programmatic access via JSON endpoint.

  • AI agent needing live web data
    Pick: Spider Cloud

    Spider Cloud's Search API and crawling engine supply up-to-date data for RAG pipelines.

  • Agent creator seeking distribution
    Pick: Registry

    Registry offers a free, open-source channel to list agents that implement ACP with authentication.

  • RAG pipeline engineer
    Pick: Spider Cloud

    Spider Cloud integrates with LangChain, LlamaIndex, and provides structured output ideal for LLM context.

  • Open source contributor
    Pick: Registry

    Registry's GitHub-based contribution model allows community involvement via pull requests.

Frequently Asked Questions

Registry vs Spider Cloud: which should you choose?

If you need to discover ACP-compatible agents and contribute to a secure, open ecosystem, Registry is your tool — it's free and protocol-first. If you need real-time web data for AI agents or RAG pipelines, Spider Cloud offers a powerful, pay-as-you-go scraping engine with a 99.9% success rate and extensive integrations. Choose Registry for agent discovery; choose Spider Cloud for web data extraction.

Can I use Registry to find agents that don't require authentication?

No, Registry only includes agents that support authentication, ensuring a baseline security level.

Does Spider Cloud offer a free tier?

Spider Cloud operates on a pay-as-you-go model; there is no free tier, but you only pay for what you use.

How do I install an agent from Registry?

You browse the registry and install agents via ACP-compatible clients like Zed or JetBrains.

What formats does Spider Cloud support for output?

It supports markdown, HTML, JSON, JSONL, CSV, XML, and plain text.

Is Registry open source?

Yes, it is open source on GitHub and accepts community contributions via pull requests.

Can Spider Cloud handle JavaScript-heavy sites?

Yes, Spider Cloud includes a Browser Cloud with stealth anti-detection for heavily protected sites.

What integrations does Registry have?

Registry integrates with GitHub, Zed Industries, and JetBrains.

Does Spider Cloud offer data connectors?

Yes, it connects to S3, GCS, Google Sheets, Azure Blob, Supabase, and more.

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Explore each tool further

Registry
View Registry reviewRegistry alternatives
Spider Cloud
View Spider Cloud reviewSpider Cloud alternatives

Browse these categories

Best AI MCP Servers & Agent Tooling toolsBest AI Web Scraping & Search APIs toolsBest AI Browser & Computer-Use Agents tools
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Last reviewed: July 3, 2026