CaptureKit for AI agents
CaptureKit captures webpage screenshots, extracts structured content, and crawls sites, giving a team a way to pull visual and text data from the web. Connect it once through Arc0, and your agent, or Claude, ChatGPT and Cursor, can use it through one MCP endpoint, limited to what each user approved.
What agents do in CaptureKit.
Capture a webpage screenshot
Capture a full-page screenshot of a URL to archive or attach to a report.
Extract a page's content
Extract structured content from a webpage instead of copying text out by hand.
Check remaining usage
Check remaining API usage before running a large batch of page captures.
5 CaptureKit actions, graded by risk.
Every CaptureKit action is tagged read, write or destructive, so one policy covers the whole app and new actions inherit the right default.
read
4Look things up. Allowed by default.
- capturekit.get_usageGet Usage
- capturekit.analyze_webpageAnalyze Webpage
- capturekit.fetch_page_htmlFetch Page HTML
- capturekit.extract_webpage_contentExtract Webpage Content
write
1Create and change things. Allow, or ask the user first.
- capturekit.capture_webpageCapture Webpage
destructive
0Delete, cancel or archive. Ask first, or deny outright.
- No destructive actions.
CaptureKit in three steps.
- 01Your users connect CaptureKitThey add their CaptureKit api key on Arc0 Connect, under your brand. It goes straight into the vault.
- 02You set the rulesReads run, and writes like “capture Webpage” can wait for the user to approve.
- 03Any agent can actYour agent calls CaptureKit through the Arc0 SDK or MCP, and so can Claude, ChatGPT and Cursor. Every call lands on the audit log.
await arc0.policies.set('capturekit', { read: 'allow', write: 'ask', // capture_webpage destructive: 'deny', }) # Claude Code: the same connection, one URL $ claude mcp add --transport http arc0 \ https://mcp.arc0.ai/u/u_8f2
How CaptureKit connects.
Users add their CaptureKit api key on Arc0 Connect. It is encrypted in the vault, never shown to the model, and each user can rotate or revoke it at any time.
The same CaptureKit connection serves your agent over MCP and your own backend over REST and the proxy, so a user connects once. How Arc0 handles credentials →
- AUTH
- API key
- CREDENTIALS
- Per-tenant encrypted vault
- MODEL SEES
- Results only, never credentials
- AUDIT LOG
- Every call, on every plan
Use CaptureKit from any agent.
ClaudeChatGPTCursor
Codex
VS CodeOpenAI Agents SDKClaude Agent SDK
Vercel AI SDK
Mastra
LangGraph
CaptureKit and Arc0, answered.
Can I use CaptureKit with Claude, ChatGPT or Cursor?
Yes. Connect CaptureKit to Arc0 once, then add your Arc0 MCP URL to Claude, ChatGPT, Cursor, Claude Code or any other remote-MCP client. Each assistant only gets the CaptureKit actions you allow.
How do users connect CaptureKit?
Users add their CaptureKit api key on Arc0 Connect. It is encrypted in the vault, never shown to the model, and each user can rotate or revoke it at any time.
Which CaptureKit actions can my agent take?
5 in total: 4 read, 1 write and 0 destructive, such as “capture Webpage”. Your policies decide which of them each agent may call.
Can I make my agent read-only in CaptureKit?
Yes. Allow read actions and deny writes in the CaptureKit policy. Your agent can still look things up, and any write it attempts is blocked and logged.
Can my own backend call CaptureKit too?
Yes. The same CaptureKit connection is available over REST and through the Arc0 proxy, so your product and your agent share one connection per user.
Plug CaptureKit into your agent.
Your users connect CaptureKit once, under your brand. Your agent gets 5 actions behind your policies, with every call on the record.
Free to build · MCP + REST · Audit log on every plan