Discover / api.builtwith.com

BuiltWith

■ Challenge detected

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

x402
Base
USDC

Listed price: $0.0495
Challenge detected: 10 of the last 10 checks
Median response: 86 ms
Last checked: 17 Oct, 09:26 UTC
In our index since: 26 Sept 2026

Endpoint

curl -i https://api.builtwith.com/agent/domain
# 402 Payment Required: pay with an x402 client (USDC on Base),
# then send the same request again with the payment attached.

1 listed endpoints · on x402 Bazaar

Checks and payment terms on this page refer to the endpoint above. Other listed endpoints have not been checked individually.

GEThttps://api.builtwith.com/agent/domain$0.0495Return BuiltWith technology detections and metadata for one domain. Useful for company research, stack analysis, competitive intelligence, and sales qualification.

A dash means the listing gives no price or method. Copy buttons copy the full URL.

Showing 1 of 1 listed endpoints.

Agents can find it through the Superstables MCP server and JSON API: GET /api/v1/services/api.builtwith.com

Recent checks

28 Sept 2026One bar per check, showing up to 20 recent checks. Coloured bars show relative response time, with a minimum visible height; full-height grey bars mean no challenge was detected. “Challenge detected” means HTTP 402 or another detected payment-challenge signal.17 Oct 2026

All 10 checks

When (UTC)	Result	HTTP	Response
17 Oct, 09:26 UTC	Challenge detected	402	441ms
16 Oct, 08:13 UTC	Challenge detected	402	102ms
14 Oct, 23:56 UTC	Challenge detected	402	88ms
13 Oct, 14:18 UTC	Challenge detected	402	78ms
11 Oct, 12:57 UTC	Challenge detected	402	79ms
10 Oct, 00:46 UTC	Challenge detected	402	82ms
8 Oct, 21:32 UTC	Challenge detected	402	122ms
7 Oct, 15:42 UTC	Challenge detected	402	75ms
6 Oct, 15:31 UTC	Challenge detected	402	84ms
28 Sept, 05:02 UTC	Challenge detected	402	294ms

Questions

Did our last probe detect a payment challenge?

At our last probe on 17 Oct, 09:26 UTC, it returned HTTP 402 or another detected payment-challenge signal. This check did not test payment, delivery or compatibility with the Superstables client.

What price is recorded for BuiltWith?

Its listed price is $0.0495.

What payment terms does BuiltWith advertise?

The listing advertises x402, Base and USDC. It names cdp as its facilitator. Check the seller's current payment challenge and authentication requirements before paying.

Where is BuiltWith listed?

In x402 Bazaar. Superstables first indexed it on 26 Sept 2026.

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