Builtwith MCP server for AI agents and assistants

Securely connect your AI agents and chatbots (Claude, ChatGPT, Cursor, etc) with Builtwith MCP or direct API to analyze website technologies, generate detailed site tech reports, track tech adoption trends, and enrich company prospect data through natural language.

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BuiltWith is a web technology profiler that uncovers the technologies powering any website. Gain actionable insights into analytics, hosting, and content management stacks for smarter research and lead generation.

10 Tools

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Type what you want done — sign in and watch it run live in the Tool Router playground.

TOOL ROUTER PLAYGROUND
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TOOLS

Supported Tools

Every Builtwith action and event your agent gets out of the box.

Create Domain List File

Tool to create a TXT or ZIP file from a list of domains.

Datasets Lookup

Tool to access mass Internet technology usage information from 2000 to today.

Domain API Lookup

Tool to retrieve current and historical technology information of a website.

Financial API Lookup

Tool to fetch financial data for a domain.

Free API Lookup

Tool to access last updated dates and counts for technology groups and categories for websites.

Lists API Get List

Tool to retrieve a list of websites using a specific technology.

Product API Lookup

Tool to find websites selling specific eCommerce products.

Recommendations API Lookup

Tool to generate a list of websites with similar technology profiles.

Redirects API Lookup

Tool to retrieve live and historical redirects for a website.

Social API Lookup

Tool to retrieve domains associated with social media profile URLs.

SETUP GUIDE

Connect Builtwith MCP Tool with your Agent

1

Install Composio

typescript
npm install @composio/core ai @ai-sdk/mcp @ai-sdk/openai
Install the Composio SDK and your agent framework
2

Create a session with MCP enabled

typescript
import { Composio } from "@composio/core";

const composio = new Composio();
const { mcp } = await composio.create("your-user-id", {
  toolkits: ["builtwith"],
  mcp: true,
});
Create a session scoped to Builtwith and read its MCP URL and headers
3

Connect your agent to the MCP server

typescript
import { createMCPClient } from "@ai-sdk/mcp";
import { openai } from "@ai-sdk/openai";
import { generateText, stepCountIs } from "ai";

const client = await createMCPClient({
  transport: { type: "http", url: mcp.url, headers: mcp.headers },
});

const { text } = await generateText({
  model: openai("gpt-5.6-sol"),
  tools: await client.tools(),
  prompt: "Show all technologies used by github.com",
  stopWhen: stepCountIs(10),
});

console.log(text);
await client.close();
Pass the session's MCP URL and headers to your agent and run a Builtwith request
SETUP GUIDE

Connect Builtwith API Tool with your Agent

1

Install Composio

typescript
npm install @composio/core @composio/openai openai
Install the Composio SDK, the OpenAI provider, and the OpenAI SDK
2

Create a Composio session

typescript
import OpenAI from "openai";
import { Composio } from "@composio/core";
import { OpenAIResponsesProvider } from "@composio/openai";

const composio = new Composio({ provider: new OpenAIResponsesProvider() });
const client = new OpenAI();

const session = await composio.create("your-user-id", { toolkits: ["builtwith"] });
const tools = await session.tools();
Initialize Composio with the OpenAI Responses provider and create a session scoped to Builtwith
3

Run Builtwith tools with your agent

typescript
let response = await client.responses.create({
  model: "gpt-5.6-sol",
  tools,
  input: [{ role: "user", content: "Show all technologies used by github.com" }],
});

while (response.output.some((o) => o.type === "function_call")) {
  const outputs = await composio.provider.handleToolCalls(session, response.output);
  response = await client.responses.create({
    model: "gpt-5.6-sol",
    tools,
    previous_response_id: response.id,
    input: outputs,
  });
}

console.log(response.output_text);
Send a request, execute the Builtwith tool calls through the session, and print the final answer

Why Use Composio?

AI Native Builtwith Integration

  • Supports both Builtwith MCP and direct API based integrations
  • Structured, LLM-friendly schemas for reliable tool execution
  • Rich coverage for profiling and analyzing website tech stacks

Managed Auth

  • Seamless API key management for Builtwith access
  • Central place to manage, scope, and revoke Builtwith credentials
  • Per-user, per-environment credential isolation—no more hard-coded keys

Agent Optimized Design

  • Tools tuned for high reliability and consistent results
  • Built-in logs so you know what websites were analyzed and when

Enterprise Grade Security

  • Fine-grained RBAC controls for Builtwith tool access
  • Scoped, least-privilege API key usage
  • Comprehensive audit trail for all AI-powered tech stack lookups

Rolling this out across your team?

Give your team centralized access control across every framework with Composio’s MCP Gateway.

EXPLORE MCP GATEWAY
FAQ

Frequently asked questions

Yes, Builtwith requires you to configure your own API key credentials. Once set up, Composio handles secure credential storage and API request handling for you.

Yes! Composio's Tool Router enables agents to use multiple toolkits. Learn more.

Yes. Composio is SOC 2 Type II compliant and is built to keep your Builtwith connection and credentials secure. OAuth tokens and API keys are encrypted, and sensitive customer data is protected at rest and in transit.

Composio also undergoes independent security testing and continuously monitors its systems for security threats. You can review the latest reports and policies in the Composio Trust Center.

Composio maintains and updates all toolkit integrations automatically, so your agents always work with the latest API versions.

Create the key in your Builtwith account settings, then paste it once on Composio's connection page. Composio stores it encrypted and uses it only for the Builtwith actions your agent runs. Nobody else in your workspace can read it, and you can revoke it inside Builtwith at any time.

When you connect a Builtwith account through Composio, every action runs under that account, so anything the agent creates, sends, or changes shows up in Builtwith as done by you. Keep an approval step in your prompt for actions with side effects, such as sending or deleting, and have the agent draft first.

Whatever the credentials you connect allow inside Builtwith. If Builtwith lets you scope a key to specific permissions, create a scoped one so the agent can only do what you intend. You can revoke the key inside Builtwith at any time.

Yes. Composio supports multiple connected accounts for the same app, and that works in Claude, ChatGPT, or any other assistant you connect through Composio. Give each Builtwith connection a name such as work or personal, and the assistant uses the one you mention in the request. Each account keeps its own credentials and nothing is merged.

The connection stops working the moment Builtwith rejects the old key. Create a new key in Builtwith and reconnect the account from the Composio dashboard or by asking your agent to reconnect Builtwith. Nothing else changes.

Composio's free Hobby plan includes 100,000 tool calls per month with no credit card, which covers most personal Builtwith use. Paid plans add higher limits and team features. Your Builtwith plan and its API limits still apply as usual.

Built-in connectors usually give one AI access to a limited set of apps. Many people use Composio because it lets their AI connect to more apps than it normally supports, or connect to multiple accounts for the same app (e.g. connect Claude to multiple Builtwith accounts).

With Composio, you connect Builtwith once and then use it across different AI assistants without setting it up separately in each one. Connect your apps to Composio once, then connect Composio to whichever AI you use, whether that's Claude, ChatGPT, Hermes, or your own custom assistant.

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