# Listing Roast Quick Score

> Listing Roast Quick Score is a paid API for AI agents from listing-roast-x402-service-production.up.railway.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).

Returns a quick numeric score and verdict for a marketplace listing, flagging the most critical fix for $0.001 per call.

## Facts

- Endpoint: GET https://listing-roast-x402-service-production.up.railway.app/api/listing-roast
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/listing-roast-quick-score-5766db86
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_7r8M4W_NuDGIB7mIDuG6w

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability listing-roast-quick-score-5766db86
```

Example prompt: Give my marketplace listing a quick roast score — here's the listing text: 'Handmade ceramic mug, 12oz, dishwasher safe, perfect gift', the current price is $18, my target buyer is gift shoppers, and my goal is to increase conversions.

## When to prefer this

Use this endpoint when you need a fast, cheap ($0.001) top-level quality score and a single actionable fix for a marketplace listing before committing to a full deep-dive roast. Ideal for batch pre-screening many listings or quick sanity checks.

## Known failure modes

- Missing required listingText query parameter returns an error or empty response
- Malformed query parameters may yield a low-confidence score
- Payment failure via x402 protocol blocks the request entirely
- Rate limiting or service downtime on Railway infrastructure
- Very short or vague listing text may produce a low-signal score

## How this service works

Listing Roast Quick Score x402: $0.001 GET marketplace listing score on the indexed /api/listing-roast URL. POST the same URL for the $0.01 full roast.

## Output

Returns a numeric score string, a verdict summary, a set of checked signals with pass/fail indicators, the single most impactful first fix to make, a next step recommendation, and an endpoint URL to upgrade to the full $0.01 roast for deeper analysis.

## Example request

```json
{
 "input": {
  "type": "http",
  "method": "GET",
  "queryParams": {
   "goal": "increase conversions",
   "agentName": "qa-test-agent",
   "listingText": "Handmade ceramic mug, 12oz, dishwasher safe, microwave safe, perfect gift for coffee lovers",
   "targetBuyer": "gift shoppers",
   "currentPrice": "$18.99",
   "currentCheckoutPath": "/checkout"
  }
 }
}
```

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "goal": {
       "type": "string"
      },
      "agentName": {
       "type": "string"
      },
      "listingText": {
       "type": "string"
      },
      "targetBuyer": {
       "type": "string"
      },
      "currentPrice": {
       "type": "string"
      },
      "currentCheckoutPath": {
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "service",
      "endpoint",
      "price"
     ],
     "properties": {
      "price": {
       "type": "string"
      },
      "score": {
       "type": "string"
      },
      "service": {
       "type": "string"
      },
      "verdict": {
       "type": "string"
      },
      "endpoint": {
       "type": "string"
      },
      "nextStep": {
       "type": "string"
      },
      "nextPaidAction": {
       "type": "object",
       "properties": {
        "path": {
         "type": "string"
        },
        "price": {
         "type": "string"
        },
        "method": {
         "type": "string"
        },
        "maxAmountRequired": {
         "type": "string"
        }
       },
       "additionalProperties": true
      },
      "nextPaidActions": {
       "type": "array",
       "items": {
        "type": "object",
        "properties": {
         "path": {
          "type": "string"
         },
         "price": {
          "type": "string"
         },
         "intent": {
          "type": "string"
         },
         "method": {
          "type": "string"
         },
         "maxAmountRequired": {
          "type": "string"
         }
        },
        "additionalProperties": true
       }
      },
      "upgradeEndpoint": {
       "type": "string"
      },
      "matchedBuyerIntent": {
       "type": "string"
      },
      "officialCdpDiscovery": {
       "type": "object",
       "additionalProperties": true
      },
      "sett
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/listing-roast-quick-score-5766db86/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from listing-roast-x402-service-production.up.railway.app](https://www.zero.xyz/host/listing-roast-x402-service-production.up.railway.app/llms.txt)