@clawfetch/mcp

MCP (Model Context Protocol) server for ClawFetch — Web Intelligence API for AI Agents.

Gives any MCP-compatible client (Claude Desktop, Cursor, Windsurf, OpenClaw, etc.) instant access to ClawFetch's web intelligence tools: fetch pages as markdown, render JS-heavy SPAs, extract structured data from 17+ site types, research topics multi-source, and check domain availability.

Payments are handled automatically via the x402 protocol — USDC on Base. No API keys, no billing dashboards.

☁️ Hosted Mode (Recommended)

Connect directly to the hosted MCP server — no installation required:

Endpoint: https://mcp.clawfetch.ai/mcp

Claude Desktop

Add to claude_desktop_config.json:

{
  "mcpServers": {
    "clawfetch": {
      "type": "url",
      "url": "https://mcp.clawfetch.ai/mcp"
    }
  }
}

Cursor / Windsurf

Add to your MCP configuration:

{
  "mcpServers": {
    "clawfetch": {
      "url": "https://mcp.clawfetch.ai/mcp"
    }
  }
}

OpenClaw

mcp:
  servers:
    clawfetch:
      url: https://mcp.clawfetch.ai/mcp

Note: The hosted server handles x402 payments server-side. Tools that require payment (fetch, render, extract, research) will charge USDC on Base per call. Free tools (health_check, wallet_info, list_extractors) work without payment.

💻 Self-Hosted Mode

Run your own instance with full control over the payment wallet.

Install

npm install -g @clawfetch/mcp

Configure (stdio — for local MCP clients)

Add to your MCP client config (e.g., Claude Desktop):

{
  "mcpServers": {
    "clawfetch": {
      "command": "clawfetch-mcp",
      "env": {
        "CLAWFETCH_PRIVATE_KEY": "0xYOUR_ETHEREUM_PRIVATE_KEY"
      }
    }
  }
}

The private key signs x402 micropayments (USDC on Base). Fund the corresponding address with USDC on Base mainnet.

Run as HTTP Server

Expose the MCP server over HTTP for remote clients:

CLAWFETCH_PRIVATE_KEY=0x... CLAWFETCH_TRANSPORT=http CLAWFETCH_PORT=3001 clawfetch-mcp

This starts a server at http://localhost:3001/mcp using the Streamable HTTP transport (MCP spec compliant).

HTTP Endpoints

Endpoint	Method	Description
/mcp	POST	Initialize session — returns Mcp-Session-Id header
/mcp	GET	SSE stream for server-to-client notifications (requires session ID)
/mcp	DELETE	Close a session
/health	GET	Server health check (JSON)

Session Flow

1. Initialize: POST /mcp with JSON-RPC initialize request → get Mcp-Session-Id header
2. Call tools: POST /mcp with Mcp-Session-Id header + JSON-RPC tools/call request
3. Stream: GET /mcp?sessionId=... for SSE notifications (optional)
4. Close: DELETE /mcp with Mcp-Session-Id header

Tools

Tool	Description	Cost
fetch_url	Fetch any URL as clean markdown	$0.001
render_page	Render JS-heavy pages (SPAs, React apps)	$0.002
extract_data	Extract structured data from 17+ site types	$0.003
research_topic	Multi-source research with citations	$0.01
check_domains	Check domain name availability	$0.002
suggest_domains	Generate available domain suggestions	$0.002
list_extractors	List supported structured data extractors	$0.001
health_check	Check API health status	Free
wallet_info	Show payment wallet address	Free

Supported Extractors

GitHub repos/profiles, npm packages, PyPI packages, Twitter/X profiles, LinkedIn profiles/companies, YouTube videos/channels, Product Hunt, Hacker News, Reddit, Crunchbase, Wikipedia, and more.

Use list_extractors to see all available types with their schema.

Environment Variables

Variable	Required	Default	Description
CLAWFETCH_PRIVATE_KEY	Yes*	—	Ethereum private key (0x-prefixed) for x402 payments
CLAWFETCH_BASE_URL	No	https://api.clawfetch.ai	API base URL
CLAWFETCH_TRANSPORT	No	stdio	Transport: stdio or http
CLAWFETCH_HOST	No	0.0.0.0	HTTP server bind address
CLAWFETCH_PORT	No	3001	HTTP server port
CLAWFETCH_TIMEOUT_MS	No	60000	Request timeout in ms
CLAWFETCH_DEBUG	No	false	Enable debug logging (1 or true)

* Required for self-hosted mode. The hosted server at mcp.clawfetch.ai manages its own wallet.

Development

git clone https://github.com/clawfetch/clawfetch-mcp.git
cd clawfetch-mcp
npm install
npm run build
npm test

License

MIT