# BuiltWith Company Identifiers API

> BuiltWith Company Identifiers API 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).

Returns company identifier data (social profiles, company IDs, and related metadata) for a given domain using BuiltWith's technology intelligence database

## Facts

- Endpoint: POST https://api.builtwith.com/agent/company-identifiers
- 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-identifiers-api-15cffa69
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_PpnxwCQA39H236C7tZRH_

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-identifiers-api-15cffa69 -d '<json body>'
```

Example prompt: Can you look up the company identifiers and social profiles associated with the domain stripe.com using BuiltWith?

## When to prefer this

Use this endpoint when you need to identify or enrich company-level metadata — particularly social profiles and business identifiers — from just a domain name. It is best suited for B2B sales enrichment, competitive intelligence, or lead qualification workflows where BuiltWith's proprietary technology-tracking database is the authoritative source. Prefer this over generic WHOIS or DNS lookups when social and company identity signals are needed rather than registrar data.

## Known failure modes

- Empty Results array if domain has no BuiltWith data
- Invalid or malformed domain input returns an error
- Domain with path included may cause lookup failure
- Unknown or very new domains may return no results
- API payment or authentication failure if x402 payment is not properly handled

## How this service works

BuiltWith API Overview

## Output

A JSON object with a Results array containing company identifier records for the queried domain, which may include social media handles, company IDs, and related business metadata sourced from BuiltWith's technology intelligence database. Fields vary based on available data for the domain.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "domain": {
   "type": "string",
   "maxLength": 253,
   "minLength": 1,
   "description": "Domain name to research, for example example.com. Do not include a URL path."
  }
 }
}
```

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/builtwith-company-identifiers-api-15cffa69/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)