# BuiltWith

> Use this tool when you need to identify web technologies used on specified domains, such as names, descriptions, and categorization, to analyze technology stacks for digital marketing, competitive analysis, or development purposes. It provides live technology data through a 'domain-lookup' tool, using a JavaScript implementation with robust error handling. The tool is ideal for situations where quick technology stack analysis is required without leaving the conversation context.

Canonical page: https://skillsregistry.net/skills/builtwith-domain-lookup  
JSON: https://api.skillsregistry.net/v1/skills/builtwith-domain-lookup

## Description

The BuiltWith MCP Server provides AI assistants with access to BuiltWith's technology detection API, allowing them to identify web technologies used on specified domains. Developed by BuiltWith Pty Ltd under MIT license, this JavaScript implementation uses the Model Context Protocol SDK to expose a single tool, 'domain-lookup', which retrieves live technology data from websites including names, descriptions, and categorization. The server communicates via stdio transport and includes robust error handling for API responses. This implementation is particularly valuable for digital marketers, competitive analysts, and developers who need to quickly analyze technology stacks without leaving their conversation context.

## Trust

- **Trust score (0–1):** 0.93
- **Verification tier:** verified
- **Last scanned:** 2026-09-19

## Facts

- **Version:** 1.0.0
- **Skill type:** atomic
- **Execution layer:** mcp-remote
- **Runtime environment:** api
- **Category:** api-integration
- **Updated:** 2026-09-19

## Source

- **Source listing:** [PulseMCP](https://www.pulsemcp.com/servers/builtwith-domain-lookup)
- **Repository:** <https://github.com/builtwith/builtwith-mcp>

## Use it

Resolve this record through the SkillsRegistry MCP server (no auth, read-only):

```
claude mcp add --transport http --scope user skillsregistry https://api.skillsregistry.net/mcp
```

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_skill",
    "arguments": {
      "slug": "builtwith-domain-lookup"
    }
  }
}
```

REST: `GET https://api.skillsregistry.net/v1/skills/builtwith-domain-lookup` · pull for local use: `GET https://api.skillsregistry.net/v1/skills/builtwith-domain-lookup/pull`

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SkillsRegistry indexes agent skills from public registries and GitHub. Skills we have analysed are scanned with Circle-IR and scored on six dimensions; each listing states its scan coverage. More: https://skillsregistry.net/llms.txt