Discover / attester.dev

Spend Check

□ No challenge detected

Spend Check: should you pay this counterparty? Watchtower track record, CDP merchant catalog, and address hygiene combined into a clear/caution/avoid verdict with a signed attestation. $0.005 USDC per check.

x402
Base
USDC
ai

Listed price: $0.005
Challenge detected: 6 of the last 10 checks
Median response: 4327 ms
Last checked: 17 Oct, 04:37 UTC
In our index since: 26 Sept 2026

Endpoint

curl -i https://attester.dev/spend-check
# 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.

POSThttps://attester.dev/spend-check$0.005Spend Check: should you pay this counterparty? Watchtower track record, CDP merchant catalog, and address hygiene combined into a clear/caution/avoid verdict with a signed attestation. $0.005 USDC per check.

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/attester.dev

Recent checks

27 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		8001ms
15 Oct, 19:10 UTC	No challenge detected		8001ms
14 Oct, 14:31 UTC	Challenge detected	402	4300ms
12 Oct, 10:53 UTC	No challenge detected		8001ms
10 Oct, 21:52 UTC	Challenge detected	402	4353ms
9 Oct, 15:32 UTC	Challenge detected	402	4300ms
8 Oct, 15:35 UTC	Challenge detected	402	5249ms
7 Oct, 09:33 UTC	No challenge detected		8002ms
6 Oct, 09:33 UTC	Challenge detected	402	5405ms
27 Sept, 17:02 UTC	Challenge detected	402	2927ms

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 price is recorded for Spend Check?

Its listed price is $0.005.

What payment terms does Spend Check 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 Spend Check listed?

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

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