builtwith/builtwith-mcp

Domain API v25
Domain lookups now use API v25. Technology records include numeric confidence scores from 0 to 1. Full JSON responses include Meta.company_reg, an array of company registration records with string type and number fields; registration numbers preserve leading zeros. The array is empty when unavailable or metadata is excluded. See the API reference. Full domain methods preserve both fields; live technology lookups include confidence and return technology records only.
🌟 Overview
**BuiltWith MCP** is a Model Context Protocol (MCP) server that allows AI assistants (Claude, Cursor, IDE agents, etc.) to query BuiltWith’s technology detection data **directly and natively**.
It enables natural-language questions like:
> “What technologies does example.com use?”
> “Does this site run Shopify or Magento?”
> “What analytics stack is used by nytimes.com?”
BuiltWith MCP supports **bring-your-own BuiltWith API key** and can be used either as a **hosted service** or **self-hosted**.
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Claude DEMO
Shows how to get this working in Claude as a Connector
https://github.com/user-attachments/assets/1199362a-c813-497e-8569-15b9a3ce9713
🌐 Hosted MCP (Recommended)
BuiltWith provides a **hosted MCP endpoint** — no local Node process required.
Endpoint
Authentication
Bring your own BuiltWith API key:
Example MCP request
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🧩 Supported Tools
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, including OTHERTECHS and numeric attribute filters such as SPEND, REVENUE, and EMPLOYEES
* 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 by vat-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)