Discover / canary-production-f6b6.up.railway.app

canary-production-f6b6.up.railway.app

■ Challenge detected

Current Base mainnet block height and base fee per gas in wei, read from the chain at request time

x402
Base
USDC

Listed price: $0.01
Challenge detected: 9 of the last 9 checks
Median response: 126 ms
Last checked: 16 Oct, 13:59 UTC
In our index since: 26 Sept 2026

Endpoint

curl -i https://canary-production-f6b6.up.railway.app/v1/base/head
# 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/canary-production-f6b6.up.railway.app

Recent checks

30 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.16 Oct 2026

All 9 checks

When (UTC)	Result	HTTP	Response
16 Oct, 13:59 UTC	Challenge detected	402	126ms
15 Oct, 04:47 UTC	Challenge detected	402	125ms
13 Oct, 20:45 UTC	Challenge detected	402	145ms
11 Oct, 19:34 UTC	Challenge detected	402	126ms
10 Oct, 03:32 UTC	Challenge detected	402	115ms
8 Oct, 21:32 UTC	Challenge detected	402	132ms
7 Oct, 18:39 UTC	Challenge detected	402	124ms
6 Oct, 16:01 UTC	Challenge detected	402	167ms
30 Sept, 05:03 UTC	Challenge detected	402	102ms

Questions

Did our last probe detect a payment challenge?

At our last probe on 16 Oct, 13:59 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 canary-production-f6b6.up.railway.app?

Its listed price is $0.01.

What payment terms does canary-production-f6b6.up.railway.app 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 canary-production-f6b6.up.railway.app listed?

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

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