Marketplace · API · x402

api.builtwith.com/agent/domain

Return BuiltWith technology detections and metadata for one domain. Useful for company research, stack analysis, competitive intelligence, and sales qualification.

Endpoint	`https://api.builtwith.com/agent/domain`
Trust	✓ Verified callable · 100% uptime over 1 checks · ~450 ms
Pricing	Pay per call with x402, no account. Call it to get an exact quote before paying.
network	eip155:8453
scheme	exact
pay to	0x1937E2d648b8f07A03429AE35f28C4942A756C94
method	GET
last updated	2026-10-30T18:39:04.182Z

Use it

Call it (an x402 client pays automatically)

curl -i https://api.builtwith.com/agent/domain
# 402 reply -> sign PAYMENT-REQUIRED with an x402 client (e.g. @x402/fetch) -> retry with PAYMENT-SIGNATURE

This listing as JSON

curl https://aipaygen.com/v1/catalog/api/x402-fef08ef2f6e26234

Search the whole marketplace from your agent (MCP)

{
  "mcpServers": {
    "aipaygen": {
      "url": "https://aipaygen.com/mcp"
    }
  }
}

Domain name availability (AIPayGen)
API$0.002/call

api.builtwith.com/agent/domain

Use it

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