Discover / x402-tools.vercel.app

x402-tools.vercel.app

■ Challenge detected

Get the top trending prediction markets on Polymarket, sorted by 24h volume. Returns up to 5 markets by default.

x402
Base
USDC

Listed price: $0.01
Challenge detected: 10 of the last 10 checks
Median response: 88 ms
Last checked: 16 Oct, 23:40 UTC
In our index since: 26 Sept 2026

Endpoint

curl -i https://x402-tools.vercel.app/api/polymarket/trending
# 402 Payment Required: pay with an x402 client (USDC on Base),
# then send the same request again with the payment attached.

2 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.

Base URLhttps://x402-tools.vercel.app/api

GET/concerts$0.01Search for upcoming concerts. Supports city, date range, genre, and artist filtering.
GET/polymarket/trending$0.01Get the top trending prediction markets on Polymarket, sorted by 24h volume. Returns up to 5 markets by default.

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

Showing 2 of 2 listed endpoints.

Agents can find it through the Superstables MCP server and JSON API: GET /api/v1/services/x402-tools.vercel.app

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.16 Oct 2026

All 10 checks

When (UTC)	Result	HTTP	Response
16 Oct, 23:40 UTC	Challenge detected	402	735ms
15 Oct, 19:10 UTC	Challenge detected	402	89ms
14 Oct, 12:00 UTC	Challenge detected	402	56ms
13 Oct, 10:39 UTC	Challenge detected	402	109ms
11 Oct, 10:02 UTC	Challenge detected	402	87ms
9 Oct, 21:31 UTC	Challenge detected	402	78ms
8 Oct, 18:39 UTC	Challenge detected	402	63ms
7 Oct, 15:42 UTC	Challenge detected	402	119ms
6 Oct, 15:31 UTC	Challenge detected	402	102ms
28 Sept, 17:02 UTC	Challenge detected	402	75ms

Questions

Did our last probe detect a payment challenge?

At our last probe on 16 Oct, 23:40 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 x402-tools.vercel.app?

Its listed price is $0.01.

What payment terms does x402-tools.vercel.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 x402-tools.vercel.app listed?

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

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