Look up any domain's full technology stack, relationships, and competitive intelligence via BuiltWith.
What it does
This MPP endpoint provides pay-per-call access to BuiltWith's domain technology profiling service. By sending a POST request with a domain name, you receive a detailed breakdown of the technologies detected on that website — frameworks, analytics tools, CDNs, CMS platforms, advertising networks, and more. The underlying BuiltWith database covers over 100 million websites.
The `/builtwith/domain` endpoint is one of 12 endpoints in the BuiltWith suite available through the Locus MPP gateway. Sibling endpoints cover technology lists (find all sites using a given tech), domain relationships, company-to-URL resolution, product search, redirect history, keyword extraction, technology trends, trust signals, recommendations, and a lighter free summary. Each call is settled via Tempo (pathUSD on Tempo L2) at $0.055 per request for most endpoints, $0.035 for lighter lookups (recommendations, redirects, keywords, trends, trust), and $0.015 for the free summary.
The domain lookup endpoint accepts optional filters: exclude PII, exclude metadata or attributes, filter by first/last detected date ranges, restrict to live technologies only, hide text descriptions, and hide dead links. All parameters are passed as string values in a JSON POST body. Payment is handled through the MPP 402 challenge flow — no API key required, just a compatible MPP wallet.
Capabilities
Use cases
- —Identify the full technology stack of a competitor's website before a sales pitch
- —Build lead lists of all domains using a specific technology like Shopify or React
- —Discover domain relationships and shared infrastructure across company properties
- —Track adoption trends for a web technology over time
- —Verify trust signals and redirect chains for due diligence on a domain
Fit
Best for
- —Sales teams building technographic lead lists
- —Competitive intelligence analysts profiling rival websites
- —Security researchers mapping domain infrastructure and relationships
- —Market researchers tracking technology adoption trends
Not for
- —Real-time website monitoring or uptime checks
- —Scraping full page content or screenshots
- —Domains not indexed by BuiltWith's crawler
Quick start
curl -X POST https://builtwith.mpp.paywithlocus.com/builtwith/domain \
-H "Content-Type: application/json" \
-d '{"LOOKUP": "example.com"}'Example
Request
{
"NOPII": "1",
"LOOKUP": "stripe.com",
"LIVEONLY": "1"
}Endpoint
Quality
Full OpenAPI schema with 12 endpoints and clear request schemas is available. However, the specific /builtwith/domain endpoint returned 404 on HEAD/GET probes (it requires POST), no response schema or example response is documented, and no crawled docs beyond the OpenAPI were retrievable. Pricing is clear from the x-payment-info fields.
Warnings
- —Probe returned 404 on HEAD and GET — endpoint requires POST method; liveness via POST was not confirmed in the probe
- —No response schema documented for any endpoint; consumers must discover response structure empirically
- —Currency address 0x20c000000000000000000000b9537d11c60e8b50 is assumed to be pathUSD (6 decimals) based on Tempo method context — not independently verified
- —External docs at https://beta.paywithlocus.com/mpp/builtwith.md and https://api.builtwith.com were not crawled
Citations
- —The OpenAPI spec describes 12 BuiltWith endpoints with request schemas and payment infohttps://builtwith.mpp.paywithlocus.com
- —Domain lookup costs 55000 base units via Tempo method; lighter endpoints cost 35000 or 15000 base unitshttps://builtwith.mpp.paywithlocus.com
- —BuiltWith covers 100M+ websiteshttps://builtwith.mpp.paywithlocus.com
- —Additional documentation referenced at beta.paywithlocus.com and api.builtwith.comhttps://builtwith.mpp.paywithlocus.com