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promptqualityscore.com api pqs-grade
https://promptqualityscore.com/api/pqs-grade
payable
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.
We sent a real
POST request to this endpoint and it
answered 402 with payment requirements we could parse.
- Price
- $0.001
- Network
- base
- Pay to
- 0xB40a687ca5483Ebc02F870348f6e08971Cae1308
- Spec dialect
- v2 (declares x402Version 2)
- Transport
- PAYMENT-REQUIRED header
- HTTP method
- POST
- Response latency
- 288 ms
- Payment options
- 1 usable of 1
- Last checked
- 2026-08-10T09:12:33.382Z (1d ago)
- Category
- finance-crypto
Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fpromptqualityscore.com%2Fapi%2Fpqs-grade"