Discover / coinflip402.vercel.app

Coin Flip

■ Challenge detected

Flip a coin for a small USDC payment on Base mainnet. Returns heads or tails.

x402
Base
USDC

Listed price: $0.001
Challenge detected: 10 of the last 10 checks
Median response: 91 ms
Last checked: 16 Oct, 23:40 UTC
In our index since: 26 Sept 2026

Endpoint

curl -i https://coinflip402.vercel.app/api/coinflip
# 402 Payment Required: pay with an x402 client (USDC on Base),
# then send the same request again with the payment attached.

1 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.

GEThttps://coinflip402.vercel.app/api/coinflip$0.001Flip a coin for a small USDC payment on Base mainnet. Returns heads or tails.

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

Showing 1 of 1 listed endpoints.

Agents can find it through the Superstables MCP server and JSON API: GET /api/v1/services/coinflip402.vercel.app

Recent checks

26 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	227ms
15 Oct, 19:10 UTC	Challenge detected	402	90ms
14 Oct, 14:31 UTC	Challenge detected	402	461ms
12 Oct, 10:53 UTC	Challenge detected	402	81ms
10 Oct, 15:44 UTC	Challenge detected	402	66ms
9 Oct, 12:40 UTC	Challenge detected	402	110ms
8 Oct, 09:33 UTC	Challenge detected	402	67ms
7 Oct, 06:40 UTC	Challenge detected	402	91ms
5 Oct, 17:05 UTC	Challenge detected	402	90ms
26 Sept, 05:02 UTC	Challenge detected	402	357ms

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 Coin Flip?

Its listed price is $0.001.

What payment terms does Coin Flip 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 Coin Flip listed?

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

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