BuiltWith Free API

JSON and XML Domain Technology Usage Dates & Totals

Introduction

The BuiltWith Free API provides last updated and counts for technology groups and categories for websites.

The general access method is as follows -
https://api.builtwith.com/free1/api.[xml|json]?KEY=[YOUR KEY]&LOOKUP=[DOMAIN]

Authentication

You must provide your API key in each lookup. See the examples for how this works.

Login or Create a Free Account to get your API key.

Get Domain Example

XML Get Domain
https://api.builtwith.com/free1/api.xml?KEY=[YOUR KEY]&LOOKUP=hotelscombined.com

JSON Get Domain
https://api.builtwith.com/free1/api.json?KEY=[YOUR KEY]&LOOKUP=builtwith.com

Reference

Parameters

The following GET parameters can be supplied for lookups

Name Examples Required
KEY 00000000-0000-0000-0000-000000000000
Sign up for Free or Login to get a key.
Yes
LOOKUP cnn.com
hotelscombined.com
Only root domains results are returned, lookingup a subdomain will return a root domain result.
Yes

Responses

The Free API will respond with a document in the format -

result->groups[group->categories[category]]
Results

free1 is the top level response that identifies the lookup.

Name Example Description
domain hotelscombined.com The domain that was looked up.
groups The group of tags explained below Explained below.
first 1294059600 Epoch time the domain was first ever indexed
last 1501282800 Epoch time the domain was last indexed
Groups

Groups contains technology tag counts i.e. analytics, cms, hosting.

Name Example Description
name javascript The tag name - see all here
live 8 Technologies in this group which are considered live on the domain.
dead 4 Technologies in this group which are considered no longer live on the domain.
latest 1479942000 The most recent date of a technology indexed in this group found on the website
oldest 1388957967 The earliest date of a technology indexed in this group on the website
categories The categories within this group explained below Explained below.
Categories

Categories contains technology tag counts for categories within the group i.e. ab testing, marketing automation within analytics.

Name Example Description
name social-sdk The category id - see all here
live 2 Technologies in this category which are considered live on the domain.
dead 0 Technologies in this category which are considered no longer live on the domain.
latest 1476572400 The most recent date of a technology indexed in this category found on the website
oldest 1364302800 The earliest date of a technology indexed in this category on the website

Code Examples

JSON/XML have integrations in all modern programming languages. Here's some StackOverflow topics for various languages - Python, C#, Java, PHP, C++, TSQL and Ruby.

Error Codes

Note error messages in this format cannot be guaranteed, your implementation should also consider non-200 response codes as errors. The Lookup property will be null (json) or not provided (xml) if the error is server related. View all potential well-formed error codes.

Terms of Use

Our standard terms cover the use all of our APIs.

In general, you can use the API to enhance your product in many ways. The only limitation is your cannot resell the data as-is or provide duplicate functionality to builtwith.com and its associated services.