BuiltWith API / Relationships API -- sites related to a domain

BuiltWith tool builtwith-rv4-api-json on looot: input fields, $0.0495 per call, output shape, and code to run it with curl, JavaScript or Python.

Paid. Returns domains related to the lookup domain through shared identifiers, infrastructure or ownership signals. Billed on the account plan at 1 credit per 500 relationships returned.

• Tool id: builtwith-rv4-api-json
• Provider: BuiltWith
• Job: Api json rv4 (rv4.api-json)
• Price: $0.0495 per call. A call that fails at the provider costs $0.

Inputs

Output

Shape of the run’s result, checked against 1 real answer:

{ Errors: unknown[], results, next_skip, max_per_page, more_results, Relationships: { Domain, Identifiers: { Last, Type, First, Value, Matches: { ... }[] }[] }[] }

Run it

Every call needs your API token in LOOOT_TOKEN; Sign in shows how to get one. Each run also needs a new idempotency key, so a retry never pays twice. With wait: 30 the answer comes back inline when the run ends within 30 seconds. Otherwise you get the running run back: poll GET /v1/runs/<runId>.

Example input with placeholder values:

curl -X POST "https://api.looot.ai/v1/runs" \
  -H "Authorization: Bearer $LOOOT_TOKEN" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: $(uuidgen)" \
  -d '{"endpointId":"builtwith-rv4-api-json","input":{"LOOKUP":"<LOOKUP>"},"wait":30}'

const response = await fetch("https://api.looot.ai/v1/runs", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.LOOOT_TOKEN}`,
    "Content-Type": "application/json",
    "Idempotency-Key": crypto.randomUUID(),
  },
  body: JSON.stringify({
    endpointId: "builtwith-rv4-api-json",
    input: {
      LOOKUP: "<LOOKUP>",
    },
    wait: 30,
  }),
});
const run = await response.json();
console.log(run.status, run.result);

import os
import uuid

import requests

response = requests.post(
    "https://api.looot.ai/v1/runs",
    headers={
        "Authorization": f"Bearer {os.environ['LOOOT_TOKEN']}",
        "Idempotency-Key": str(uuid.uuid4()),
    },
    json={
        "endpointId": "builtwith-rv4-api-json",
        "input": {
            "LOOKUP": "<LOOKUP>",
        },
        "wait": 30,
    },
    timeout=90,
)
run = response.json()
print(run["status"], run.get("result"))

To let looot pick among every provider of this job instead, send job:rv4.api-json as endpointId; see the job page.