# BuiltWith Trust Signals Lookup via Locus x402

> BuiltWith Trust Signals Lookup via Locus x402 is a paid API for AI agents from builtwith.x402.paywithlocus.com, paid per call via x402, $0.035/call, status unknown (last checked 2026-09-15).

Retrieves trust signal data for a given domain using the BuiltWith dataset, surfacing credibility and reliability indicators for websites.

## Facts

- Endpoint: POST https://builtwith.x402.paywithlocus.com/builtwith/trust
- Price: $0.035/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/builtwith-trust-signals-lookup-via-locus-x402-27f572e3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Rb_dANB0-epli3ekNTX19

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-trust-signals-lookup-via-locus-x402-27f572e3 -d '<json body>'
```

Example prompt: Can you pull the trust signals for shopify.com using BuiltWith — I want to know how credible and established that domain looks before we move forward with the partnership?

## When to prefer this

Choose this endpoint when you need structured trust and credibility signals specifically for a domain, powered by BuiltWith's dataset of 100M+ websites. It is ideal for vendor vetting, fraud prevention, lead qualification, or due diligence workflows where domain legitimacy matters. Prefer this over generic WHOIS lookups when you want technology-informed trust signals rather than raw registration data.

## Known failure modes

- Invalid or malformed domain input returns an error or empty data object
- Domain not found in BuiltWith's database returns empty trust data
- Payment failure (insufficient USDC balance) prevents the request from completing
- Network timeout may occur for slow upstream BuiltWith data retrieval
- Rate limiting may apply if too many requests are made in rapid succession

## How this service works

Technology profiling for websites — detect tech stacks, find sites using specific technologies, discover domain relationships, trends, and competitive intelligence across 100M+ websites.

## Output

A JSON object containing trust signal data for the queried domain, along with payment settlement details (amount in USDC) and a request ID with a status URL for tracking. The trust data reflects BuiltWith's credibility and reliability indicators for the domain.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "LOOKUP": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "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
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/builtwith-trust-signals-lookup-via-locus-x402-27f572e3/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from builtwith.x402.paywithlocus.com](https://www.zero.xyz/host/builtwith.x402.paywithlocus.com/llms.txt)