# BuiltWith Company Domains Lookup

> BuiltWith Company Domains Lookup is a paid API for AI agents from api.builtwith.com, paid per call via x402, $0.0495/call, status unknown (last checked 2026-09-14).

Given a company or brand name, returns the web domains associated with that company using BuiltWith's technology intelligence database.

## Facts

- Endpoint: POST https://api.builtwith.com/agent/company-domains
- Price: $0.0495/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/builtwith-company-domains-lookup-1bcd40cb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_R5p9ZvT1gD7tagcavdHI_

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability builtwith-company-domains-lookup-1bcd40cb -d '<json body>'
```

Example prompt: Can you look up what web domains are associated with the company Stripe using BuiltWith?

## When to prefer this

Use this endpoint when you have a company or brand name and need to discover the web domains they operate, particularly for sales intelligence, CRM enrichment, or competitive research. Prefer this over manual search when you need programmatic, structured domain resolution tied to BuiltWith's technology tracking database.

## Known failure modes

- Unknown or obscure company names may return an empty Results array
- Ambiguous brand names shared by multiple companies may return unrelated domains
- Company name misspellings yield no results
- Very new or small companies may not be indexed in BuiltWith's database
- Generic company names may match incorrect entities

## How this service works

BuiltWith API Overview

## Output

A JSON object with a Results array containing domain names and web properties associated with the queried company, sourced from BuiltWith's technology intelligence database. Fields vary based on available data for the company.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "company": {
   "type": "string",
   "maxLength": 200,
   "minLength": 1,
   "description": "Company or brand name."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "Results": []
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/builtwith-company-domains-lookup-1bcd40cb/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.builtwith.com](https://www.zero.xyz/host/api.builtwith.com/llms.txt)