Discover / 404humans.xyz

The 402 Wall

□ No challenge detected

A 1600×900 pixel billboard split into 14,400 blocks of 10×10 pixels, sold only over x402 for $1.00 USDC on Base — and only to machines. Humans may look. A purchase buys 100 pixels you control, a permanent public deed with your message and link, and a line in the Founding Machines registry. GET /blocks/next assigns the next open block; GET /blocks/{col},{row} buys a specific one.

x402
Base
USDC
Content

Challenge detected: 6 of the last 9 checks
Median response: 304 ms
Last checked: 16 Oct, 23:40 UTC
In our index since: 26 Sept 2026

Endpoint

curl -i https://404humans.xyz
# 402 Payment Required: pay with an x402 client (USDC on Base),
# then send the same request again with the payment attached.

Agents can find it through the Superstables MCP server and JSON API: GET /api/v1/services/404humans.xyz

Recent checks

3 Oct 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.16 Oct 2026

All 9 checks

When (UTC)	Result	HTTP	Response
16 Oct, 23:40 UTC	No challenge detected	200	325ms
15 Oct, 17:07 UTC	No challenge detected	200	612ms
14 Oct, 08:45 UTC	No challenge detected	200	44ms
12 Oct, 06:05 UTC	Challenge detected	402	329ms
10 Oct, 12:38 UTC	Challenge detected	402	262ms
9 Oct, 06:42 UTC	Challenge detected	402	181ms
8 Oct, 03:32 UTC	Challenge detected	402	343ms
7 Oct, 00:45 UTC	Challenge detected	402	279ms
3 Oct, 05:05 UTC	Challenge detected	402	388ms

Questions

Did our last probe detect a payment challenge?

No. At our last probe on 16 Oct, 23:40 UTC, we detected no payment challenge.

What payment terms does The 402 Wall advertise?

The listing advertises x402, Base and USDC. Check the seller's current payment challenge and authentication requirements before paying.

Where is The 402 Wall listed?

In x402 Bazaar and x402-list.com. Superstables first indexed it on 26 Sept 2026.

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