Discover / promptqualityscore.com

promptqualityscore.com

■ Challenge detected

Quick pre-flight quality score: composite (0-100) + grade (A-F) + three framework sub-scores (PEEM, RAGAS, G-Eval) + verdict. Run upstream of any other paid call to filter weak prompts before inference. The cheapest gate on the AI input quality problem.

x402
Base
USDC
ai

Listed price: $0.001
Challenge detected: 10 of the last 10 checks
Median response: 210 ms
Last checked: 17 Oct, 09:26 UTC
In our index since: 26 Sept 2026

Endpoint

curl -i https://promptqualityscore.com/api/pqs-grade
# 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://promptqualityscore.com/api/pqs-grade$0.001Quick pre-flight quality score: composite (0-100) + grade (A-F) + three framework sub-scores (PEEM, RAGAS, G-Eval) + verdict. Run upstream of any other paid call to filter weak prompts before inference. The cheapest gate on the AI input quality problem.

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/promptqualityscore.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, 09:26 UTC	Challenge detected	402	305ms
16 Oct, 11:31 UTC	Challenge detected	402	206ms
14 Oct, 23:56 UTC	Challenge detected	402	214ms
13 Oct, 10:39 UTC	Challenge detected	402	223ms
11 Oct, 10:02 UTC	Challenge detected	402	171ms
10 Oct, 00:46 UTC	Challenge detected	402	182ms
8 Oct, 21:32 UTC	Challenge detected	402	355ms
7 Oct, 15:42 UTC	Challenge detected	402	266ms
6 Oct, 15:31 UTC	Challenge detected	402	205ms
29 Sept, 05:02 UTC	Challenge detected	402	162ms

Questions

Did our last probe detect a payment challenge?

At our last probe on 17 Oct, 09:26 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 promptqualityscore.com?

Its listed price is $0.001.

What payment terms does promptqualityscore.com 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 promptqualityscore.com listed?

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

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