Discover / probe402.com

probe402

□ No challenge detected

Independent health, price and history lookups for x402 and MPP endpoints. probe402 probes a fixed seed list on a clock, archives every observation immutably, and answers: alive right now? quoting what? price or schema changed? blocked, or actually dead? The grade is free; history depth is paid. Operated by a named person; not affiliated with any rail operator or graded endpoint. Method, rubric and corrections: https://probe402.com/method

x402
Base
USDC
Verification

Challenge detected: 0 of the last 3 checks
Last checked: 16 Oct, 21:16 UTC
In our index since: 14 Oct 2026

Endpoint

curl -i https://probe402.com
# 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/probe402.com

Recent checks

14 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 3 checks

When (UTC)	Result	HTTP	Response
16 Oct, 21:16 UTC	No challenge detected	200	1283ms
15 Oct, 14:11 UTC	No challenge detected	200	1561ms
14 Oct, 08:45 UTC	No challenge detected	200	1990ms

Questions

Did our last probe detect a payment challenge?

No. At our last probe on 16 Oct, 21:16 UTC, we detected no payment challenge.

What payment terms does probe402 advertise?

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

Where is probe402 listed?

In x402-list.com. Superstables first indexed it on 14 Oct 2026.

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