Api Endpoint

promptqualityscore.com

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.

Open interactive test console

Offering

Provider: promptqualityscore.com
Method: POST
Offering type: Api Endpoint
Transport type: http
Category: Development
Delivery: Not provided
Pricing model: Not provided
x402 version: 2

Endpoint context

URL: https://promptqualityscore.com/api/pqs-grade
MIME type: Not provided
First seen: 2026-10-16T01:51:10.599Z
Last seen: 2026-11-01T15:03:32.021Z
Tags: None supplied

Website

Payment pricing

x402 payment terms are the authoritative price for calling this endpoint.

Payment option 1: 0.001 USDC
Atomic price: 1000 · Network: eip155:8453 · Asset: USDC · Scheme: exact

Raw x402 terms

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "1000",
    "payTo": "0xB40a687ca5483Ebc02F870348f6e08971Cae1308"
  }
]

Observed health

Status: Healthy
Latest latency: 160 ms
Average latency: 322 ms
HTTP status: 204
Last checked: 2026-11-02T16:11:32.743Z
Reachability: 100% over 14 checks

Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.

Input schema

{
  "additionalProperties": false,
  "properties": {
    "body": {
      "properties": {
        "prompt": {
          "description": "Prompt text to grade (1-10000 chars)",
          "maxLength": 10000,
          "minLength": 1,
          "type": "string"
        },
        "vertical": {
          "default": "general",
          "description": "Optional domain: software/content/business/education/science/crypto/general/research",
          "enum": [
            "software",
            "content",
            "business",
            "education",
            "science",
            "crypto",
            "general",
            "research"
          ],
          "type": "string"
        }
      },
      "required": [
        "prompt"
      ],
      "type": "object"
    },
    "bodyType": {
      "enum": [
        "json",
        "form-data",
        "text"
      ],
      "type": "string"
    },
    "method": {
      "enum": [
        "POST"
      ],
      "type": "string"
    },
    "pathParams": {
      "type": "object"
    },
    "type": {
      "const": "http",
      "type": "string"
    }
  },
  "required": [
    "type",
    "method",
    "bodyType",
    "body"
  ],
  "type": "object"
}

Output schema

{
  "type": "json",
  "example": {
    "grade": "C",
    "score": 58,
    "verdict": "PEEM flags weak output format and role definition. Specify how the answer should be shaped and who is asking.",
    "frameworks": {
      "peem": 5.5,
      "geval": 6,
      "ragas": 5.7
    },
    "upgrade_url": "https://promptqualityscore.com/pro?utm_source=pqs-grade&utm_medium=api&utm_campaign=2026-05-grade-launch",
    "methodology_url": "https://promptqualityscore.com/blog/five-framework-synthesis?utm_source=pqs-grade&utm_medium=api&utm_campaign=2026-05-grade-launch"
  }
}