Registry vs Spider Cloud

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

Analysis reviewed Live tool data as of 2026-10-18
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At a glance

DimensionRegistrySpider Cloud
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

The ACP Registry is one JSON endpoint listing every ACP-compatible coding agent you can install and authenticate.

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Spider Cloud
Spider Cloud

Spider Cloud is a web scraping, crawling, and search API that streams live pages as markdown or JSON for AI agents and RAG pipelines.

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Pricing
Free
Freemium
Plans
$0/mo
$1/GB + $0.0001/CPU-min
From $6/mo
From $40/mo
Custom
Popularity
9 views
7.5k views
Skill Level
Intermediate
Intermediate
API Available
Platforms
WebAPI
WebAPIPluginCLIDesktop
Categories
🔌 MCP Servers & Agent Tooling
🌐 Web Scraping & Search APIs🖱️ Browser & Computer-Use Agents
Features
Curated catalog of ACP-compatible coding, DevOps, and general-purpose agents
Every listed agent must support authentication to be admitted
Single CDN endpoint serves the whole catalog as registry JSON
Per-agent versioned metadata with exact version numbers
Distribution info enabling automated installation by ACP clients
Optional icon.svg per listing, 16x16 recommended
Fork-based submission via GitHub pull request
agent.json schema for standardized agent submissions
Maintainer review for authentication compliance and schema fit
Read-only catalog requiring no account or API key
Covers agents from Anthropic, OpenAI, Google, xAI, Mistral, Alibaba, JetBrains, Snowflake and Cognition
Includes DevOps agents such as Stakpak and general-purpose agents such as LangChain-powered DeepAgents
Individual agents expose streaming, tool calls, image input, mid-session model switching, and session load/fork/resume
ACP v1 stable with v2 available in draft
Local-first and marketplace listings coexist, including Agoragentic and siGit Code
Scrape a single page into markdown, JSON, HTML, raw, or plain text
Crawl entire sites with each page streamed as one JSONL line in order as it finishes
Web search endpoint returns SERP results plus the scraped pages behind them
Custom browser renders like a user: scripts run, lazy images load, infinite scroll reaches the end
Load protected pages through a real browser engine with geo checks, returning a 200
Run full browser sessions over WebSocket with anti-detection and rotating exits
Send AI commands (Act, Extract, Observe) over the Browser API WebSocket
Send a prompt on a scrape or crawl request and get named fields back as JSON
Two-phase AI extraction: a fast model for most pages, a stronger model for complex layouts
Provider router sends scrape and crawl requests to outside providers on your own keys
Data connectors pipe crawl results into S3, GCS, Google Sheets, Azure Blob, or Supabase
Proxy network with 215M+ residential and ISP exits in 199 countries, rotated per request
MCP server at mcp.spider.cloud for Claude Code, Codex, Cursor, and Claude Desktop
1,000+ ready-made scraper examples across 32 categories, each with working code
API responses support JSON, JSONL, CSV, and XML; up to 10,000 core API requests per minute by default
Integrations
GitHub
Zed Industries
JetBrains
LangChain
LlamaIndex
CrewAI
FlowiseAI
Langflow
Dify
Agno
MCP
Claude Code
Codex
Cursor
Claude Desktop
Amazon S3
Google Cloud Storage
Google Sheets

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

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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