API endpoint that allows you to get access to keywords connected to websites.
The general access method is as follows -
https://api.builtwith.com/kw2/api.[xml|json]?KEY=[YOUR KEY]&LOOKUP=[DOMAIN NAME]
You must provide your API key in each lookup. See the examples for how this works.
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Get Domain Example
XML Get Single Domain
JSON Get Single Domain
The following GET parameters can be supplied for lookups
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Only root domains work with the Keyword API (not internal pages or subdomains)
When doing RAW domain lookups, you can parse up to 16 domains at once as a CSV. For example cnn.com,about.com,builtwith.com - this dramatically improves throughput.
The Keyword API will respond with a document in the format -
Keyword is the top level response that identifies the lookup.
||The domain that was looked up.
||A list of keywords found on the webpage
||The list of keywords found on the domain
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.
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.
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 you cannot resell the data as-is or provide duplicate functionality to builtwith.com and its associated services.