Discover / x402-api-catalog.onrender.com

PreFlight Checker

□ No challenge detected

Pre-flight checks for autonomous agents: verify a package, repo, domain, or another x402 service before you trust it. Code checks (npm trust score, GitHub repo health), network checks (domain liveness), and ops checks (x402 service diagnostics). $0.02-$1.00 per call via x402 on Base, no signup, no API key.

x402
Base
USDC
Verification

Challenge detected: 7 of the last 10 checks
Median response: 137 ms
Last checked: 17 Oct, 04:37 UTC
In our index since: 26 Sept 2026

Endpoint

curl -i https://x402-api-catalog.onrender.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/x402-api-catalog.onrender.com

Recent checks

29 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, 04:37 UTC	No challenge detected	200	117ms
15 Oct, 19:10 UTC	No challenge detected	200	333ms
14 Oct, 08:45 UTC	No challenge detected	200	525ms
13 Oct, 20:45 UTC	Challenge detected	402	137ms
11 Oct, 19:34 UTC	Challenge detected	402	149ms
10 Oct, 03:32 UTC	Challenge detected	402	261ms
8 Oct, 21:32 UTC	Challenge detected	402	158ms
7 Oct, 15:42 UTC	Challenge detected	402	131ms
6 Oct, 15:31 UTC	Challenge detected	402	129ms
29 Sept, 05:02 UTC	Challenge detected	402	122ms

Questions

Did our last probe detect a payment challenge?

No. At our last probe on 17 Oct, 04:37 UTC, we detected no payment challenge.

What payment terms does PreFlight Checker advertise?

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

Where is PreFlight Checker listed?

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

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