clawfetch

@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, enrich companies from a domain, and check domain availability.

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

Access and payment

The public hosted MCP endpoint is retired and returns HTTP 410 Gone. Run the MCP locally using the setup below, or call https://api.clawfetch.ai directly. Paid tool calls use your own USDC-funded wallet on Base; ClawFetch does not subsidize requests.

💻 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). By default it binds to 127.0.0.1 and accepts only loopback Host headers, which blocks DNS-rebinding attacks from web pages. To serve remote clients, set CLAWFETCH_HOST=0.0.0.0 and list your public hostnames in CLAWFETCH_ALLOWED_HOSTS.

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)	$0.005
extract_data	Extract structured data from 17+ site types	$0.008
research_topic	Multi-source research with citations	$0.02
check_domains	Check domain name availability	$0.003
suggest_domains	Generate available domain suggestions	$0.003
parse_document	Parse office docs (docx/pptx/xlsx/pdf/…) to markdown	$0.005
enrich_company	Company profile from a domain: socials, emails, tech stack, key pages	$0.02
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	127.0.0.1	HTTP server bind address
CLAWFETCH_ALLOWED_HOSTS	No	localhost,127.0.0.1,[::1]	Comma-separated Host header allowlist for the HTTP transport (DNS-rebinding protection)
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 tool calls. Without it the server still starts and lists its tools, resources and prompts (so registries can inspect it), and every call returns setup instructions. Keep this key in your local configuration; never submit it to the ClawFetch website.

Development

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

License

MIT