BuiltWith Technology Lists via Locus x402

x402

BuiltWith Technology Lists via Locus x402 is a paid API for AI agents from builtwith.x402.paywithlocus.com, paid per call via x402, $0.055/call, status unknown (last checked 2026-09-15).

Returns a paginated list of websites using a specified technology, sourced from BuiltWith's database of 100M+ websites.

Price / call$0.055

Seller volume →—

Success—

StatusUnknown

How this service works

Locus public pay-per-use API

Output

A JSON object containing a list of websites that use the specified technology, along with optional metadata about each domain, a pagination offset token for fetching the next page, and payment settlement details including USDC amounts charged.

Example use cases

Lead generation by tech stack

“Pull me up to 200 websites that are using HubSpot — I want to prospect companies already on that platform.”

Competitive tech landscape research

“Which websites are running on Magento? Give me 50 results with metadata so I can analyze who our e-commerce competitors are.”

Market share sampling for a technology

“I'm researching React adoption — can you fetch a list of 500 sites using React so I can study the market?”

Technical details

Endpoint

POSThttps://builtwith.x402.paywithlocus.com/builtwith/lists

When to prefer

Use this endpoint when you need a bulk list of domains using a specific named technology — ideal for lead generation, market research, or competitive intelligence at scale. Prefer this over single-domain lookup endpoints when your goal is discovering which sites use a given tech rather than profiling a single domain. Best suited for agents that need paginated access to BuiltWith's full technology adoption dataset.

Side effects

Invalid or unrecognized technology name returns empty or error response
AMOUNT exceeding 500 results in validation error or capped response
Missing TECH parameter may return an error or empty dataset
Invalid OFFSET token causes pagination failure
Payment failure via x402 protocol blocks request from being processed
Rate limiting or quota exhaustion may return 402 or 429 errors

Input

Schema · Request body

Field	Type	Description
META	string
TECH	string
ORDER	string
AMOUNT	string
OFFSET	string

Output

Schema · Response

{
  "type": "json",
  "example": {
    "data": {},
    "payment": {
      "scheme": "exact",
      "settledUsdc": "0.001000",
      "authorizedMaxUsdc": "0.001000"
    },
    "request": {
      "id": "00000000-0000-4000-8000-000000000000",
      "statusUrl": "/requests/00000000-0000-4000-8000-000000000000"
    },
    "success": true
  }
}

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Example use cases

Lead generation by tech stack

“Pull me up to 200 websites that are using HubSpot — I want to prospect companies already on that platform.”

Competitive tech landscape research

“Which websites are running on Magento? Give me 50 results with metadata so I can analyze who our e-commerce competitors are.”

Market share sampling for a technology

“I'm researching React adoption — can you fetch a list of 500 sites using React so I can study the market?”

Technical details

Endpoint

POSThttps://builtwith.x402.paywithlocus.com/builtwith/lists

When to prefer

Side effects

Invalid or unrecognized technology name returns empty or error response
AMOUNT exceeding 500 results in validation error or capped response
Missing TECH parameter may return an error or empty dataset
Invalid OFFSET token causes pagination failure
Payment failure via x402 protocol blocks request from being processed
Rate limiting or quota exhaustion may return 402 or 429 errors

Input

Schema · Request body

Field	Type	Description
META	string
TECH	string
ORDER	string
AMOUNT	string
OFFSET	string

Output

Schema · Response

{
  "type": "json",
  "example": {
    "data": {},
    "payment": {
      "scheme": "exact",
      "settledUsdc": "0.001000",
      "authorizedMaxUsdc": "0.001000"
    },
    "request": {
      "id": "00000000-0000-4000-8000-000000000000",
      "statusUrl": "/requests/00000000-0000-4000-8000-000000000000"
    },
    "success": true
  }
}