Free API

JSON and XML Domain Technology Usage Dates & Totals

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

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Free API Documentation

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 categhory 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

Endpoints

Connection points for the BuiltWith Free API.

https://api.builtwith.com/free1/api.xml

XML Response Endpoint

https://api.builtwith.com/free1/api.json

JSON Response Endpoint

https://api.builtwith.com/categoriesV4.xml

Technology Categories index (json version)

https://api.builtwith.com/v11/api.xml?UPDATE=1

Last database update dates (json version)

Examples

Example endpoint responses.

https://api.builtwith.com/free1/api.xml?KEY=00000000-0000-0000-0000-000000000000&LOOKUP=hotelscombined.com

XML Lookup for domain hotelscombined.com

https://api.builtwith.com/free1/api.json?KEY=00000000-0000-0000-0000-000000000000&LOOKUP=builtwith.com

JSON Lookup for domain builtwith.com

Error Codes

Error codes are wrapped in result objects.

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.

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.

Terms and Conditions of Use

Our standard terms cover the use of the BuiltWith Free API.

In general, you can use the Free 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.