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api.builtwith.com agent relationships
https://api.builtwith.com/agent/relationships
payable
Find domains related through shared identifiers, infrastructure, analytics, ownership signals, and other BuiltWith relationship evidence.
We sent a real
POST request to this endpoint and it
answered 402 with payment requirements we could parse.
- Price
- $0.05
- Network
- base
- Pay to
- 0x1937E2d648b8f07A03429AE35f28C4942A756C94
- Spec dialect
- v2 (declares x402Version 2)
- Transport
- PAYMENT-REQUIRED header
- HTTP method
- POST
- Response latency
- 62 ms
- Payment options
- 1 usable of 1
- Last checked
- 2026-08-10T09:10:29.489Z (1d ago)
- Category
- other
Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fapi.builtwith.com%2Fagent%2Frelationships"