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Connectors · Developer & infrastructure

BuiltWith MCP server for AI agents.

actionlake is an MCP gateway: one remote MCP server that connects Claude and other MCP clients to BuiltWith and the rest of your systems. It gives your agent 25 BuiltWith actions (25 reads and 0 writes) and holds the BuiltWith credential itself, so the agent never does. It paces BuiltWith's limits and records every call.

Connect BuiltWith freeSee pricing

100,000 free calls a month. No card, no email, no password: press Start a free sandbox on the next screen and keep the key it shows you.

claude mcp add --transport http actionlake https://connect.actionlake.com/mcp
the first call
do {  action: "builtwith.company_registration_types.list",  intent: "check which BuiltWith account is connected"}# Company registration types the VAT API returns · read · 1 upstream call
  • 25actionsin one signed file
  • 25readlook, never change
  • 0writecreate and update
  • 0wait for a yesdestructive, confirmed first

Set up

Connect BuiltWith in three steps.

  1. 01

    Add actionlake to Claude.

    Run the command once in Claude Code; its consent page can create a free sandbox: 100,000 calls a month, no card. In the Claude app, add a custom connector with the URL below and paste your key on the consent page. Creating a new sandbox from the Claude app is not yet tested by us.

    https://connect.actionlake.com/mcp
  2. 02

    Connect BuiltWith.

    API key. No consent screen: your agent can connect it for you, but the key then passes through your chat. To keep it out of the model's context, paste it in the console instead. actionlake stores what you paste write-only, sealed under your tenant's key.

    • api_keyBuiltWith API key: builtwith.com > account > API Access (the same KEY used by the REST APIs)
    account { op: "connections.requirements", service: "builtwith" }
# free: exactly what to paste, and what is found for you
  3. 03

    Make the first call. Check before a write.

    Ask in plain words; Claude picks the action. Before anything changes, check validates the call and prices it, for free.

    do    { action: "builtwith.company_registration_types.list" }# company registration types the vat api returns · read · 1 upstream call

BuiltWith at a glance

Sign-in
API key. No consent screen: your agent can connect it for you, but the key then passes through your chat. To keep it out of the model's context, paste it in the console instead.
You provide
api_key
Limits we pace to
10 calls a second, per connection
Built from
BuiltWith's documentation, read 23 October 2026api.builtwith.comapi.builtwith.com
Service file
Version 1.0.0, signed (Ed25519)
Cached reads
25 of 25 reads, for up to 5 minutes; a write clears what it affects
Shared entities
1, so ask can line BuiltWith up with your other systems
Data
Processed and stored in Sydney, Australia. No US region yet

Capabilities

What an AI agent can do in BuiltWith.

25 actions in 20 areas. Every one carries its effect, so a key can allow the reads and hold the rest.

  • 25readlook, never change
  • 0writecreate and update
  • 0destructivewait for a confirmation

  1. Domains

    3

    3 read · 0 write · 0 destructive

    Domain technology profile · Live technologies on a domain · Domain technology profile (raw Domain API JSON)

  2. Account

    2

    2 read · 0 write · 0 destructive

    API credit balance · Account limits, credit costs and endpoint inventory

  3. Ask

    2

    2 read · 0 write · 0 destructive

    Natural-language website list query (Ask API) · Natural-language website list query (raw Ask API JSON)

  4. Keywords

    2

    2 read · 0 write · 0 destructive

    Websites containing a keyword · Keyword data for a domain

  5. Companies

    1

    1 read · 0 write · 0 destructive

    Domains for a company name

  6. Company registration types

    1

    1 read · 0 write · 0 destructive

    Company registration types the VAT API returns

  7. Company registrations

    1

    1 read · 0 write · 0 destructive

    Public company registration numbers (VAT, GST, ABN...) for domains

  8. Domain changes

    1

    1 read · 0 write · 0 destructive

    Technology additions and removals for domains

12 more areas · 12 actions
  • MCP server categories 1
  • MCP servers 1
  • Products 1
  • Recommendations 1
  • Redirects 1
  • Relationships 1
  • Tags 1
  • Technologies 1
  • Technology counts 1
  • Technology lists 1
  • Trends 1
  • Trust 1

Top actions

The BuiltWith API, shaped for agents.

The ids your agent types, what each does, and the one name it shares with other systems.

ActionWhat it doesEffectSame name in
builtwith.domains.getDomain technology profileDomain technology profile.readthis connector
builtwith.ask.queryNatural-language website list query (Ask API)Natural-language website list query (Ask API).readthis connector
builtwith.technologies.searchSearch technologies and categories by meaningSearch technologies and categories by meaning.readthis connector
builtwith.technology_lists.getWebsites using a technology (Lists API)Websites using a technology (Lists API).readthis connector
builtwith.companies.lookup_domainsDomains for a company nameDomains for a company name.readthis connector
builtwith.trends.getTechnology usage trendsTechnology usage trends.readthis connector
builtwith.account.usageAPI credit balanceAPI credit balance.readthis connector
builtwith.account.whoamiAccount limits, credit costs and endpoint inventoryAccount limits, credit costs and endpoint inventory.readthis connector
builtwith.relationships.getRelated websites for a domainRelated websites for a domain.readthis connector
builtwith.domain_changes.getTechnology additions and removals for domainsTechnology additions and removals for domains.readthis connector
builtwith.domains.lookup_liveLive technologies on a domainLive technologies on a domain.readthis connector
builtwith.technology_counts.getTechnology category counts for a domain (Free API)Technology category counts for a domain (Free API).readthis connector

Try it

Prompts to paste into Claude.

Each one names the BuiltWith actions it will call, so you know what it reads and what it changes before you send it.

  1. Readread

    List the companies in BuiltWith and flag likely duplicates by name or domain.

    callsbuiltwith.domains.get

Governance for BuiltWith

Every write can wait for a yes.

None of BuiltWith's actions is destructive. A key can still be held to reads, capped, and set so a person confirms every write.

A destructive action runs only with confirm: true. Under the human policy the agent cannot confirm for itself: the run stops until a named person approves, in the console or from a signed link in an email. The cap on a key is refused before the call is sent, never after.

a key for this connector
account {  op: "keys.create", name: "builtwith-agent",  allowed_actions: ["builtwith.*"], cap_calls: 2000,  confirm_policy: "human_for_writes"}
Illustrative. Scoped to BuiltWith only, capped at 2,000 upstream calls, every write confirmed.

Cost

What BuiltWith costs on actionlake.

Every BuiltWith action is one upstream call, the only thing actionlake bills. Searching, check, cost, account and any call BuiltWith refused with 401, 403, 429 or a 5xx are free. Paid plans start at US$49 a month for 250,000 calls, with overage from US$0.30 down to US$0.18 per 1,000.

  • 1upstream call per actionall 25 BuiltWith actions
  • 25actions pageeach page of a long list is one call
  • 25reads can be cacheda cache hit costs nothing
  • 100,000calls a month, freepaid plans from US$49 a month for 250,000

See pricing

Action index

Every BuiltWith action.

25 actions by area: the id your agent calls, what it does, and its effect.

Domains3
  • builtwith.domains.getDomain technology profileread
  • builtwith.domains.get_rawDomain technology profile (raw Domain API JSON)read
  • builtwith.domains.lookup_liveLive technologies on a domainread
Account2
  • builtwith.account.usageAPI credit balanceread
  • builtwith.account.whoamiAccount limits, credit costs and endpoint inventoryread
Ask2
  • builtwith.ask.queryNatural-language website list query (Ask API)read
  • builtwith.ask.query_rawNatural-language website list query (raw Ask API JSON)read
Keywords2
  • builtwith.keywords.getKeyword data for a domainread
  • builtwith.keywords.searchWebsites containing a keywordread
Companies1
  • builtwith.companies.lookup_domainsDomains for a company nameread
Company registration types1
  • builtwith.company_registration_types.listCompany registration types the VAT API returnsread
Company registrations1
  • builtwith.company_registrations.getPublic company registration numbers (VAT, GST, ABN...) for domainsread
Domain changes1
  • builtwith.domain_changes.getTechnology additions and removals for domainsread
MCP server categories1
  • builtwith.mcp_server_categories.listMCP registry categoriesread
MCP servers1
  • builtwith.mcp_servers.searchSearch the BuiltWith MCP server registryread
Products1
  • builtwith.products.searchEcommerce product searchread
Recommendations1
  • builtwith.recommendations.getTechnology recommendations for a domainread
Redirects1
  • builtwith.redirects.getLive and historical redirects for a domainread
Relationships1
  • builtwith.relationships.getRelated websites for a domainread
Tags1
  • builtwith.tags.getRelated domains by IP or attribute tagread
Technologies1
  • builtwith.technologies.searchSearch technologies and categories by meaningread
Technology counts1
  • builtwith.technology_counts.getTechnology category counts for a domain (Free API)read
Technology lists1
  • builtwith.technology_lists.getWebsites using a technology (Lists API)read
Trends1
  • builtwith.trends.getTechnology usage trendsread
Trust1
  • builtwith.trust.getTrust score for a domainread

Questions

The BuiltWith MCP server, answered.

Is there a BuiltWith MCP server for Claude?

Yes. actionlake is an MCP gateway: a remote MCP server that gives Claude, or another MCP client, 25 BuiltWith actions across domains, account, ask and keywords, through the same eight tools it uses for every other connector. actionlake is independent; it is not made or endorsed by BuiltWith.

What do I need to connect BuiltWith?

BuiltWith API key: builtwith.com > account > API Access (the same KEY used by the REST APIs). The free call account { op: "connections.requirements", service: "builtwith" } lists exactly what to paste.

Will an AI agent use up my BuiltWith API limit?

actionlake paces every call to the limits in the BuiltWith service file: 10 calls a second per connection. Repeated reads are answered from cache (25 BuiltWith actions can be), which never reaches BuiltWith.

What does a BuiltWith action cost?

One upstream call, the only unit actionlake bills. A list that pages bills one call per page (25 BuiltWith actions page). Cache hits, searches, dry runs and calls BuiltWith refused with 401, 403, 429 or a 5xx are free. The Free plan includes 100,000 calls a month with no card. Paid plans start at US$49 a month for 250,000 calls, with overage from US$0.30 down to US$0.18 per 1,000.

Does actionlake keep my BuiltWith data, and where?

actionlake processes and stores data in Sydney, Australia; there is no US region yet. Reads may be cached for up to 5 minutes, and a write clears the reads it affects. Each run's request and response is kept, sealed, for your plan's trace window: 1 day on Free, 3 days on Starter, 7 days on Pro, 14 days on Team, 30 days on Business and 30 days on Enterprise. Your BuiltWith credential is sealed under your tenant's key, never logged and never returned. Your traffic is not used to train models.

Which AI clients can use it?

Claude Code, tested by us end to end, and the Claude app as a custom connector, tested by us with an existing key. Other MCP clients that support remote servers over Streamable HTTP (MCP revisions 2025-06-18 and 2025-11-25) and OAuth dynamic client registration, or a bearer header, should connect the same way; we have not tested them. Or plain REST, under the same action names.

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actionlake is independent. It is not made or endorsed by BuiltWith; the name is the vendor's own. Counts are from the BuiltWith service file, version 1.0.0.

Give your agent BuiltWith today.

Connect BuiltWith freeSee pricing

Start free - 100,000 calls/month, no card. No signup. Hard caps on every key. Cached answers are free.