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BuiltWith tracks the technology stacks of millions of websites. The BuiltWith MCP server lets AI agents look up a site's technology profile, track...

BuiltWith MCP connector

Install the SDK
Section titled “Install the SDK”
- Node.js
- Python
Terminal window
1 npm install @scalekit-sdk/node
Terminal window
1 pip install scalekit
Full SDK reference: Node.js | Python
Set your credentials
Section titled “Set your credentials”

Add your Scalekit credentials to your .env file. Find values in app.scalekit.com > Developers > API Credentials.
.env
```
SCALEKIT_ENVIRONMENT_URL=<your-environment-url>
SCALEKIT_CLIENT_ID=<your-client-id>
SCALEKIT_CLIENT_SECRET=<your-client-secret>
```

1
import { ScalekitClient } from '@scalekit-sdk/node'
2
import 'dotenv/config'
3

4
const scalekit = new ScalekitClient(
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  process.env.SCALEKIT_ENV_URL,
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  process.env.SCALEKIT_CLIENT_ID,
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  process.env.SCALEKIT_CLIENT_SECRET,
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)
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const actions = scalekit.actions
10

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const connector = 'builtwithmcp'
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const identifier = 'user_123'
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// Make your first call
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const result = await actions.executeTool({
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  connector,
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  identifier,
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  toolName: 'builtwithmcp_whoami_api',
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  toolInput: {},
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})
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console.log(result)

1
import os
2
from scalekit.client import ScalekitClient
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from dotenv import load_dotenv
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load_dotenv()
5

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scalekit_client = ScalekitClient(
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    env_url=os.getenv("SCALEKIT_ENV_URL"),
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    client_id=os.getenv("SCALEKIT_CLIENT_ID"),
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    client_secret=os.getenv("SCALEKIT_CLIENT_SECRET"),
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)
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actions = scalekit_client.actions
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connection_name = "builtwithmcp"
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identifier = "user_123"
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# Make your first call
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result = actions.execute_tool(
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    tool_input={},
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    tool_name="builtwithmcp_whoami_api",
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    connection_name=connection_name,
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    identifier=identifier,
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)
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print(result)

What you can do

Connect this agent connector to let your agent:

Api x402 vector, x402 vat, x402 trust — Vector similarity search across BuiltWith technologies and categories
Pricing x402 — Show prepaid batch-credit pricing, x402 configuration, and List pass tiers
List x402, mcp — Purchase a 30-day Basic ($295, 2 technology and 2 keyword reports) or Pro ($495, 50 and 50) List API pass with Base USDC
Search x402 keywords, keywords — Search websites containing a keyword with a valid x402 List pass
Lookup x402 domain, domain — Returns live web technologies for one domain using one prepaid credit
Json x402 domain api, domain api, ask api — Raw Domain API JSON lookup for one or more comma-separated domains

Tool list

Use the exact tool names from the Tool list below when you call execute_tool. If you’re not sure which name to use, list the tools available for the current user first.

builtwithmcp_ask_api#Ask API lookup for natural language website list queries. OpenAI requests are served as preview results and do not commit full reports.4 params

Ask API lookup for natural language website list queries. OpenAI requests are served as preview results and do not commit full reports.

NameTypeRequiredDescription

querystringrequiredThe natural language query (e.g. 'Magento websites in Spain')

commitbooleanoptionalIgnored for OpenAI/ChatGPT requests; preview mode is always used there

metabooleanoptionalSet to true to include metadata in the results

nextOffsetstringoptionalPagination offset from the previous response's NextOffset

builtwithmcp_ask_api_json#Raw Ask API JSON lookup for app/internal use. OpenAI requests never send COMMIT=true.4 params

Raw Ask API JSON lookup for app/internal use. OpenAI requests never send COMMIT=true.

NameTypeRequiredDescription

querystringrequiredThe natural language query (e.g. 'Magento websites in Spain')

commitbooleanoptionalSet to true to run a full report returning up to 1000 results

metabooleanoptionalSet to true to include metadata in the results

nextOffsetstringoptionalPagination offset from the previous response's NextOffset

builtwithmcp_change_api#Change API JSON lookup for technology additions and removals by domain. Supports one or more comma-separated domains and optional natural language SINCE values such as 'last month'.2 params

Change API JSON lookup for technology additions and removals by domain. Supports one or more comma-separated domains and optional natural language SINCE values such as 'last month'.

NameTypeRequiredDescription

lookupstringrequiredDomain name, or comma-separated domain names, to check for technology changes

sincestringoptionalOptional natural language date range such as 'last month'; defaults to 3 months

builtwithmcp_company_to_url#Company to URL API JSON lookup for domains from a company name.1 param

Company to URL API JSON lookup for domains from a company name.

NameTypeRequiredDescription

companystringrequiredThe company name to resolve to a website domain.

builtwithmcp_domain_api#Domain API JSON lookup for technology and metadata by domain.1 param

Domain API JSON lookup for technology and metadata by domain.

NameTypeRequiredDescription

lookupstringrequiredOne or more root domain names to look up. Some endpoints accept a comma-separated list of up to 16 — see the tool description for the exact limit.

builtwithmcp_domain_api_json#Raw Domain API JSON lookup for technology and metadata by domain.1 param

Raw Domain API JSON lookup for technology and metadata by domain.

NameTypeRequiredDescription

lookupstringrequiredOne or more root domain names to look up. Some endpoints accept a comma-separated list of up to 16 — see the tool description for the exact limit.

builtwithmcp_domain_lookup#Returns the live web technologies used on the root domain name.2 params

Returns the live web technologies used on the root domain name.

NameTypeRequiredDescription

domainstringrequiredThe root domain name to look up (without http/https or www).

liveOnlybooleanoptionalWhen true, only technologies currently detected as live on the site are returned (excludes historical/removed technologies).

builtwithmcp_free_api#Free API JSON lookup for category/group counts by domain.1 param

Free API JSON lookup for category/group counts by domain.

NameTypeRequiredDescription

lookupstringrequiredOne or more root domain names to look up. Some endpoints accept a comma-separated list of up to 16 — see the tool description for the exact limit.

builtwithmcp_keywords_api#Keywords API JSON lookup for keyword data by domain.1 param

Keywords API JSON lookup for keyword data by domain.

NameTypeRequiredDescription

lookupstringrequiredOne or more root domain names to look up. Some endpoints accept a comma-separated list of up to 16 — see the tool description for the exact limit.

builtwithmcp_keywords_search_api#Keyword Search API — find websites containing a specific keyword. Returns a list of matching domains and a NextOffset value for pagination. Costs API credits per query.3 params

Keyword Search API — find websites containing a specific keyword. Returns a list of matching domains and a NextOffset value for pagination. Costs API credits per query.

NameTypeRequiredDescription

keywordstringrequiredThe keyword to search for (e.g. 'perfume')

limitintegeroptionalResults per request (16–1000, default 100)

offsetstringoptionalDomain name from the previous response's NextOffset for pagination

builtwithmcp_list_api#List API JSON lookup for websites using a primary technology. Requires an active BuiltWith plan. OTHERTECHS are subordinate filters and do not consume additional primary technology report slots.23 params

List API JSON lookup for websites using a primary technology. Requires an active BuiltWith plan. OTHERTECHS are subordinate filters and do not consume additional primary technology report slots.

NameTypeRequiredDescription

techstringrequiredPrimary technology name, such as Shopify

aiMaturitystringoptionalFilter results by BuiltWith's AI maturity score range for the site.

aiOpennessstringoptionalFilter results by BuiltWith's AI openness score range for the site.

aiReadinessstringoptionalFilter results by BuiltWith's AI readiness score range for the site.

aiVisibilitystringoptionalFilter results by BuiltWith's AI visibility score range for the site.

allbooleanoptionalWhen true, includes all matching results rather than a summarized subset.

bwRankstringoptionalFilter results by BuiltWith traffic rank range.

bwsstringoptionalFilter results by BuiltWith technology-adoption score range.

countrystringoptionalTwo-letter country code to filter results by.

ecommerceCategorystringoptionalFilter results by ecommerce product category.

employeesstringoptionalFilter results by estimated employee count range.

followersstringoptionalFilter results by estimated social media follower count range.

majesticstringoptionalFilter results by Majestic referring-domains rank range.

metabooleanoptionalWhen true, includes extra metadata fields in the response.

offsetstringoptionalPagination offset — pass the value returned from the previous response to fetch the next page.

otherTechsstringoptionalOptional comma-separated subordinate technology filters; these do not consume additional report slots

pageRankstringoptionalFilter results by BuiltWith page rank range.

revenuestringoptionalFilter results by estimated company revenue range.

sincestringoptionalNatural-language date range to filter by, e.g. 'last month' or 'last 6 months'. Defaults to 3 months if omitted.

sitemapstringoptionalFilter results by estimated sitemap page count range.

skustringoptionalFilter results by estimated product/SKU count range (ecommerce sites).

spendstringoptionalFilter results by estimated technology/ad spend range.

trancostringoptionalFilter results by Tranco traffic rank range.

builtwithmcp_mcp_list_api#Search and browse remote MCP servers in the BuiltWith MCP registry (v2). Requires a BuiltWith API key supplied as a bearer token. Provide search, category, or both. Returns up to 100 results per page as a JSON array of {Domain, Category, Description, Endpoints: [{Endpoint, AuthRequired, Tools: [{Name, Description}]}], first_detected, last_detected}, and preserves the complete API response including any fields added in the future. Uses no API credits.3 params

Search and browse remote MCP servers in the BuiltWith MCP registry (v2). Requires a BuiltWith API key supplied as a bearer token. Provide search, category, or both. Returns up to 100 results per page as a JSON array of {Domain, Category, Description, Endpoints: [{Endpoint, AuthRequired, Tools: [{Name, Description}]}], first_detected, last_detected}, and preserves the complete API response including any fields added in the future. Uses no API credits.

NameTypeRequiredDescription

categorystringoptionalMCP registry category slug; required when search is omitted

offsetintegeroptionalZero-based pagination offset (default 0; page size is 100)

searchstringoptionalKeyword matched against MCP server domains and descriptions; required when category is omitted

builtwithmcp_mcp_list_categories#List valid BuiltWith MCP registry category slugs, labels, and entry counts (v2). This public endpoint requires no API key and uses no API credits.0 params

List valid BuiltWith MCP registry category slugs, labels, and entry counts (v2). This public endpoint requires no API key and uses no API credits.

builtwithmcp_payment_balance#Check an existing account's API-credit balance through the saved-Stripe-method top-up service. This is not x402.1 param

Check an existing account's API-credit balance through the saved-Stripe-method top-up service. This is not x402.

NameTypeRequiredDescription

billingKeystringoptionalSeparately scoped Agent Billing Key; optional when the MCP request uses a compatible credential

builtwithmcp_payment_config#Retrieve saved-Stripe-method account top-up limits, UTC monthly period, purchase increment, and idempotency rules. This is not x402.1 param

Retrieve saved-Stripe-method account top-up limits, UTC monthly period, purchase increment, and idempotency rules. This is not x402.

NameTypeRequiredDescription

billingKeystringoptionalSeparately scoped Agent Billing Key; optional when the MCP request uses a compatible credential

builtwithmcp_payment_purchase#Charge an existing account's saved Stripe payment method and add account API credits. This is not x402. Requires the separately scoped Agent Billing Key, fixed 2,000-credit increments, and an idempotency key.3 params

Charge an existing account's saved Stripe payment method and add account API credits. This is not x402. Requires the separately scoped Agent Billing Key, fixed 2,000-credit increments, and an idempotency key.

NameTypeRequiredDescription

billingKeystringrequiredSeparately scoped Agent Billing Key from payments.builtwith.com/agent-payment-api-config

creditsintegerrequiredNumber of account API credits to purchase in fixed increments of 2,000

idempotencyKeystringrequiredUnique operation identifier; reuse only when retrying the identical purchase

builtwithmcp_product_api#Product API JSON lookup for ecommerce product searches.1 param

Product API JSON lookup for ecommerce product searches.

NameTypeRequiredDescription

querystringrequiredThe ecommerce product search text.

builtwithmcp_recommendations_api#Recommendations API JSON lookup for technology recommendations by domain.1 param

Recommendations API JSON lookup for technology recommendations by domain.

NameTypeRequiredDescription

lookupstringrequiredOne or more root domain names to look up. Some endpoints accept a comma-separated list of up to 16 — see the tool description for the exact limit.

builtwithmcp_redirects_api#Redirects API JSON lookup for live and historical redirects by domain.1 param

Redirects API JSON lookup for live and historical redirects by domain.

NameTypeRequiredDescription

lookupstringrequiredOne or more root domain names to look up. Some endpoints accept a comma-separated list of up to 16 — see the tool description for the exact limit.

builtwithmcp_relationships_api#Relationships API JSON lookup for related websites by domain.1 param

Relationships API JSON lookup for related websites by domain.

NameTypeRequiredDescription

lookupstringrequiredOne or more root domain names to look up. Some endpoints accept a comma-separated list of up to 16 — see the tool description for the exact limit.

builtwithmcp_tags_api#Tags API JSON lookup for related domains from IP or attributes.1 param

Tags API JSON lookup for related domains from IP or attributes.

NameTypeRequiredDescription

lookupstringrequiredAn IP address or account attribute to find related domains for.

builtwithmcp_trends_api#Trends API JSON lookup for technology trend data.1 param

Trends API JSON lookup for technology trend data.

NameTypeRequiredDescription

techstringrequiredThe primary technology name to filter by, using BuiltWith's technology naming, such as Shopify.

builtwithmcp_trust_api#Trust API JSON lookup for trust scoring by domain.1 param

Trust API JSON lookup for trust scoring by domain.

NameTypeRequiredDescription

lookupstringrequiredOne or more root domain names to look up. Some endpoints accept a comma-separated list of up to 16 — see the tool description for the exact limit.

builtwithmcp_usage_api#Usage API JSON lookup for current credit balance (used, purchased, remaining). Uses no API credits.0 params

Usage API JSON lookup for current credit balance (used, purchased, remaining). Uses no API credits.

builtwithmcp_vat_api#VAT API JSON lookup for VAT, GST, CNPJ, ABN, and other publicly displayed company registration numbers associated with websites. Accepts 1–16 comma-separated domains. Uses 1 API credit only for each domain that returns registration data; domains with no results use no credits. Returned identifiers are found on public websites and are not verified or validated by BuiltWith.1 param

VAT API JSON lookup for VAT, GST, CNPJ, ABN, and other publicly displayed company registration numbers associated with websites. Accepts 1–16 comma-separated domains. Uses 1 API credit only for each domain that returns registration data; domains with no results use no credits. Returned identifiers are found on public websites and are not verified or validated by BuiltWith.

NameTypeRequiredDescription

lookupstringrequiredOne to 16 domain names, separated by commas

builtwithmcp_vat_types_api#List every company registration type that the VAT API may return, including its code, friendly name, and description. This public endpoint requires no API key and uses no API credits.0 params

List every company registration type that the VAT API may return, including its code, friendly name, and description. This public endpoint requires no API key and uses no API credits.

builtwithmcp_vector_api#Search BuiltWith technologies and categories by text query using vector similarity. Returns ranked results with similarity scores (0–1), descriptions, and category info. Useful for discovering what technologies match a concept or description (e.g. 'react framework', 'payment gateway', 'live chat'). Costs 1 API credit per query.2 params

Search BuiltWith technologies and categories by text query using vector similarity. Returns ranked results with similarity scores (0–1), descriptions, and category info. Useful for discovering what technologies match a concept or description (e.g. 'react framework', 'payment gateway', 'live chat'). Costs 1 API credit per query.

NameTypeRequiredDescription

querystringrequiredText to search for (e.g. 'javascript framework', 'email marketing')

limitintegeroptionalMax results to return (default 10, max 100)

builtwithmcp_whoami_api#WhoAmI API JSON lookup for account limits, credit costs, privacy flags, max batch sizes, and endpoint inventory. Uses no API credits. Call this first to make account-aware decisions.0 params

WhoAmI API JSON lookup for account limits, credit costs, privacy flags, max batch sizes, and endpoint inventory. Uses no API credits. Call this first to make account-aware decisions.

builtwithmcp_x402_ask_api#Natural-language website query using one prepaid credit. Committed reports and pagination also require a Basic or Pro List pass.7 params

Natural-language website query using one prepaid credit. Committed reports and pagination also require a Basic or Pro List pass.

NameTypeRequiredDescription

creditKeystringrequiredReusable prepaid key returned by x402-credit-purchase

payerstringrequiredBase wallet address that will sign the x402 payment

querystringrequiredThe search text or natural-language query.

commitbooleanoptionalWhen true, runs a full committed report (consumes a report slot) instead of a preview.

metabooleanoptionalWhen true, includes extra metadata fields in the response.

nextOffsetstringoptionalPagination token copied from the previous response's NextOffset field.

passTokenstringoptionalOpaque token returned by x402-list-pass-purchase

builtwithmcp_x402_change_api#Technology additions and removals for one or more comma-separated domains. Deducts prepaid credits from a reusable key.3 params

Technology additions and removals for one or more comma-separated domains. Deducts prepaid credits from a reusable key.

NameTypeRequiredDescription

creditKeystringrequiredReusable prepaid key returned by x402-credit-purchase

lookupstringrequiredOne or more root domain names to look up. Some endpoints accept a comma-separated list of up to 16 — see the tool description for the exact limit.

sincestringoptionalNatural-language date range to filter by, e.g. 'last month' or 'last 6 months'. Defaults to 3 months if omitted.

builtwithmcp_x402_company_to_url#Domains associated with a company name. Deducts prepaid credits from a reusable key.2 params

Domains associated with a company name. Deducts prepaid credits from a reusable key.

NameTypeRequiredDescription

companystringrequiredThe company name to resolve to a website domain.

creditKeystringrequiredReusable prepaid key returned by x402-credit-purchase

builtwithmcp_x402_credit_balance#Check purchased, used, pending, and available credits for a reusable prepaid key. Uses no payment and consumes no credits.1 param

Check purchased, used, pending, and available credits for a reusable prepaid key. Uses no payment and consumes no credits.

NameTypeRequiredDescription

creditKeystringrequiredReusable prepaid key returned by x402-credit-purchase

builtwithmcp_x402_credit_purchase#Purchase a batch of at least 2,000 non-expiring BuiltWith API credits with one x402 payment. Returns a reusable secret credit key; provide an existing key to top it up.3 params

Purchase a batch of at least 2,000 non-expiring BuiltWith API credits with one x402 payment. Returns a reusable secret credit key; provide an existing key to top it up.

NameTypeRequiredDescription

creditsintegerrequiredNumber of API credits, in the increments this endpoint requires.

payerstringrequiredBase wallet address that will sign the x402 payment

creditKeystringoptionalReusable prepaid key returned by x402-credit-purchase

builtwithmcp_x402_domain_api#Domain API technology and metadata lookup for one domain using one prepaid credit.2 params

Domain API technology and metadata lookup for one domain using one prepaid credit.

NameTypeRequiredDescription

creditKeystringrequiredReusable prepaid key returned by x402-credit-purchase

lookupstringrequiredOne or more root domain names to look up. Some endpoints accept a comma-separated list of up to 16 — see the tool description for the exact limit.

builtwithmcp_x402_domain_api_json#Raw Domain API JSON lookup for one or more comma-separated domains. Deducts prepaid credits from a reusable key.2 params

Raw Domain API JSON lookup for one or more comma-separated domains. Deducts prepaid credits from a reusable key.

NameTypeRequiredDescription

creditKeystringrequiredReusable prepaid key returned by x402-credit-purchase

lookupstringrequiredOne or more root domain names to look up. Some endpoints accept a comma-separated list of up to 16 — see the tool description for the exact limit.

builtwithmcp_x402_domain_lookup#Returns live web technologies for one domain using one prepaid credit.3 params

Returns live web technologies for one domain using one prepaid credit.

NameTypeRequiredDescription

creditKeystringrequiredReusable prepaid key returned by x402-credit-purchase

domainstringrequiredThe root domain name to look up (without http/https or www).

liveOnlybooleanoptionalWhen true, only technologies currently detected as live on the site are returned (excludes historical/removed technologies).

builtwithmcp_x402_keywords_api#Keyword data for a domain. Deducts prepaid credits from a reusable key.2 params

Keyword data for a domain. Deducts prepaid credits from a reusable key.

NameTypeRequiredDescription

creditKeystringrequiredReusable prepaid key returned by x402-credit-purchase

lookupstringrequiredOne or more root domain names to look up. Some endpoints accept a comma-separated list of up to 16 — see the tool description for the exact limit.

builtwithmcp_x402_keywords_search_api#Search websites containing a keyword with a valid x402 List pass.5 params

Search websites containing a keyword with a valid x402 List pass.

NameTypeRequiredDescription

keywordstringrequiredThe keyword to search for across indexed websites.

passTokenstringrequiredOpaque token returned by x402-list-pass-purchase

payerstringrequiredBase wallet address that will sign the x402 payment

limitintegeroptionalMaximum number of results to return for this request.

offsetstringoptionalPagination offset — pass the value returned from the previous response to fetch the next page.

builtwithmcp_x402_list_api#List websites using a primary technology with a valid x402 List pass. OTHERTECHS are subordinate filters and never consume additional technology report slots.25 params

List websites using a primary technology with a valid x402 List pass. OTHERTECHS are subordinate filters and never consume additional technology report slots.