The BuiltWith Lists API provides XML and JSON access to lists of websites using particular web technologies across the entire internet.
The general access method is as follows -
https://api.builtwith.com/lists11/api.[xml|json|txt|csv|tsv]?KEY=[YOUR KEY]&TECH=[TECHNOLOGY NAME]
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.
XML Get List of sites using Shopify Example
JSON Get List of sites using Magento Example
Get List with Meta
XML Get List of sites using Optimizely with Meta
JSON Get List of sites using Optimizely Recently (since 30 Days Ago)
Get All Including Historical
XML Get List of sites using Magento including sites historically that have stopped using it
Get Mega Technologies (3,000,000+ results)
This is no longer supported - please see Datasets for more information on how to get larger technologies.
The following GET parameters can be supplied for lookups
Sign up for Free or Login to get a key.
The name of a technology, replaces spaces with dashes (-).
Brings back meta data with the results, which includes names, titles, social links, addresses, emails, telephone numbers, traffic ranks etc.
Brings back results which have this TLD extension and/or country address. Use comma for multiple i.e. AU,NZ ISO 3166-1 alpha-2 except UK
Gets the next page of results - use the exact value from NextOffset in response. If the value of NextOffset is END there are no more results.
Gets live sites using the technology since a certain time, accepts dates and queries i.e. 30 Days Ago or Last January for example.
Gets all sites including historical - cannot be used with SINCE.
The Lists API will send responses in the format -
List5 contains the property of the next page of the report (called NextOffset) as well as the array of Results and potentially an array of Errors.
||This provides an anchor to the next page of results. Provide this under the request parameter OFFSET to get the next page of results. If NextOffSet is END you are at the end of the list.
||Result objects explain below.
||All of the results for this lookup.
Results contain R9 objects that are the websites that match your query.
||A website that matches the query.
||Epoch seconds website was first indexed.
||Epoch seconds website was last indexed.
||Array of the locations on the site where this was detected recently
||Epoch seconds technology was first detected.
||Epoch seconds technology was last detected.
||Monthly technology spend average is USD.
||The amount of unqiue produts we find on the eCommerce portion of the site.
||Estimated sales revenue for eCommerce sites.
||Page Rank Top 100m Traffic Rank.
||Tranco Top 1m Traffic Rank.
||Majestic Top 1m Link Rank.
||Umbrella Top 1m Traffic Rank.
||Meta object explain below.
||Supplied when META=yes parameter is used.
Meta data found on the lookup website - detailed lookups only will return meta data if found.
||A valid incorporated company name
||A valid city name for supported countries
||A valid zip/postal code
||A valid state/country
||ISO 3166-1 alpha-2 country code for address
||Technology and Computing
||One of these categories or blank.
||Valid international telephone numbers
||Valid domain emails
|Title for people at the company
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.