BuiltWith

BuiltWith provides ahosted MCP endpoint— no local Node process required.

Authorization: Bearer YOUR_BUILTWITH_API_KEY

{ "jsonrpc": "2.0", "id": 1, "method": "tools/list" }

The hosted MCP exposes the following tools:

- domain-lookup– Live technology detection for a domain
- domain-api– Full domain metadata
- change-api– Technology additions and removals with business context
- lists-api– Sites using a technology, includingOTHERTECHSand numeric attribute filters such asSPEND,REVENUE, andEMPLOYEES
- relationships-api– Related websites
- free-api– Category and group counts
- company-to-url– Company → domain discovery
- tags-api– IP / attribute based discovery
- recommendations-api– Technology recommendations
- redirects-api– Live and historical redirects
- keywords-api– Keyword intelligence
- trends-api– Technology trend data
- product-api– Ecommerce product search
- trust-api– Trust scoring
- vat-api– VAT, GST, and other company registration numbers for websites
- vat-types-api– Reference list of registration types returned byvat-api(no API key required)
- whoami-api– Account limits, credit costs, and endpoint inventory (no API credits)
- usage-api– Current credit balance (no API credits)
- mcp-registry-api– Search and browse the BuiltWith MCP registry (v1) of other remote MCP servers (no API credits)
- mcp-registry-v2-api– Search and browse the BuiltWith MCP registry (v2) of other remote MCP servers, with per-endpoint auth flags and first/last detected dates (no API credits)
- vector-search– Semantic similarity search across technologies and categories
- ask-api– Natural language website list lookup (e.g. "Magento websites in Spain"); supports full reports and pagination
- payment-balance– Check your API credit balance
- payment-config– Retrieve your payment configuration
- payment-purchase– Purchase API credits using your saved Stripe payment method
- agent-auth-start– Start Agent Device-Code Authorization (no API key required)
- agent-auth-token– Poll for authorization result and retrieve access token (no API key required)

⚙️ Client Configuration (Claude, Cursor, IDEs)

Add BuiltWith MCP to your MCP-compatible client configuration.

{ "mcpServers": { "builtwith": { "url": "https://api.builtwith.com/mcp", "headers": { "Authorization": "Bearer YOUR_BUILTWITH_API_KEY" } } } }

- macOS:~/Library/Application Support/Claude/claude_desktop_config.json
- Windows:%APPDATA%\Claude\claude_desktop_config.json

- macOS:~/Library/Application Support/Code/User/globalStorage/saoudrizwan.claude-dev/settings/cline_mcp_settings.json
- Windows:%APPDATA%\Code\User\globalStorage\saoudrizwan.claude-dev\settings\cline_mcp_settings.json

You can also run the BuiltWith MCP server locally or inside your own infrastructure.

The local server now supports both standard MCP transports:

- stdio(default) for local MCP clients like Claude Desktop/Cursor
- httpfor remote/connector style MCP usage on/mcp

git clone https://github.com/builtwith/builtwith-mcp.git cd builtwith-mcp npm install

MIT License — see the LICENSE file for details.

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