BuiltWith Tags API

Introduction

Get XML and JSON results of websites that are using specific IP addresses, Google Analytics Tags and more.

The general access method is as follows -
https://api.builtwith.com/tag1/api.[xml|json]?KEY=[YOUR KEY]&LOOKUP=[ATTRIBUTE-TYPE]-[CODE]

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 Tag Example

XML Get Single Domain
https://api.builtwith.com/tag1/api.xml?KEY=[YOUR KEY]&LOOKUP=IP-98.158.194.127

JSON Get Single Domain
https://api.builtwith.com/tag1/api.json?KEY=[YOUR KEY]&LOOKUP=CA-PUB-1894893914772263

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	IP-98.158.194.127 CA-PUB-1894893914772263 Attributes that you'd like to lookup - the list of attribute types is available at https://api.builtwith.com/tag1/api.xml?TYPES=true (json) Multi-Lookup Option You can lookup 16 attributes at a time - seperate them with a comma. For example IP-98.158.194.127,CA-PUB-1894893914772263 - this dramatically improves throughput.	Yes

Responses

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

Tag1[Identifiers->Identifier[Match]]

Identifier

Identifier is the sub-option in the identifers array.

Name	Example	Description
Value	IP-98.158.194.127	The tag that was looked up.
Identifers	Identifier explained below	Explained below

Match

Matches are other domains that have this identifier.

Name	Example	Description
Domain	tjoos.com	The domain name of the match
First	2013-03-26T13:00:00Z	The date we first detected this tag
Last	2016-04-23T14:00:00Z	The date we last detected this tag