x402 census · promptqualityscore.com · 9dfbcecb4292 · JSON
POST /api/pqs-grade
unprobed
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.
Verdict: not verified by an unpaid GET. not probed yet. This says nothing about whether the route works when called as declared.
Facts from the catalogs
| Field | Value |
|---|---|
| URL | https://promptqualityscore.com/api/pqs-grade |
| Method | POST |
| Price | $0.001 USDC = 1000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 |
| Network | eip155:8453 (base) |
| payTo | 0xB40a687ca5483Ebc02F870348f6e08971Cae1308 |
| Seller | promptqualityscore.com |
| Catalogs | cdp (row updated 2026-09-17) |
| Listed since (lower bound) | 2026-09-17 (earliest catalog timestamp; catalogs report last-update times only) |
| Last catalog update | 2026-09-17 |
| CDP quality counters | 4 calls and 3 unique payers in 30 days, last call 2026-09-17 (catalog-reported, not verified on chain) |
| Category (keyword rule) | inference/llm |
| Templated path | no |
| x402Version in catalog | 2 |
| Service name / tags | none |
Unpaid probe (census of )
| Field | Value |
|---|---|
| Probe | not probed in this build |
No hourly re-probe has reached this resource yet; the cron covers a rotating slice of 150 per hour.
On-chain facts for the payTo (public address)
| Field | Value |
|---|---|
| Distinct payers | 14 |
| Payments | 17 |
| USDC volume | $1.40 |
| Median payment | $0.13 |
| First / last payment | 2026-06-21 / 2026-09-17 |
| Sampler-shaped share of payments | 100.0% |
| Payers that are not samplers | 0 |
| Source | forensics-2026-09-30 |
| Address | 0xB40a687ca5483Ebc02F870348f6e08971Cae1308 |
Declared input and output (extensions.bazaar)
{
"input": {
"body": {
"prompt": "Explain PQS scoring in one sentence to an AI agent operator.",
"vertical": "general"
},
"bodyType": "json",
"method": "POST",
"pathParams": {},
"type": "http"
},
"output": {
"type": "json",
"example_truncated": true,
"chars": 492
}
}
Try it (unpaid: shows the 402)
curl -si -X POST 'https://promptqualityscore.com/api/pqs-grade' -H 'accept: application/json' -H 'content-type: application/json' --data '{}'
The catalog declares POST. A 402 answer carries the payment requirements in the JSON body and, for x402 v2, base64 in the PAYMENT-REQUIRED header. This page never sends a payment.
Paid checks (x402, USDC on Base)
GET https://bazaar.agentexchange.work/r/9dfbcecb4292/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"9dfbcecb4292"} places this resource at the top of the report and search pages for 30 days for $1.00, labelled. Unpaid requests answer 402 with the terms. Pricing.
Catalog references: agentic.market (CDP Bazaar front end) · this record as JSON · all resources on promptqualityscore.com.