# AgentUtility App Review Sentiment Analyzer

> AgentUtility App Review Sentiment Analyzer is a paid API for AI agents from x402.agentutility.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Analyzes app store reviews to produce an overall sentiment score, confidence, and sentiment label (positive/negative/mixed).

## Facts

- Endpoint: POST https://x402.agentutility.ai/app-review-sentiment
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agentutility-app-review-sentiment-analyzer-3d16ede4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_zQwGf7M0uZuPDiumgU9qh

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 agentutility-app-review-sentiment-analyzer-3d16ede4 -d '<json body>'
```

Example prompt: Analyze the sentiment of this app store review and tell me the overall score, whether it's positive, negative, or mixed, and how confident you are: 'The UI is beautiful but the app crashes constantly and support never responds.'

## When to prefer this

Use this endpoint when you need a fast, pay-per-call sentiment classification specifically tuned for app store review language, with a numeric polarity score and confidence metric. Prefer this over general-purpose sentiment APIs when you want USDC micropayment billing and MCP-native agent compatibility without subscription overhead.

## Known failure modes

- Empty or missing review text returns a 400 error
- Payment failure or insufficient USDC balance returns 402
- Extremely short or ambiguous review text may yield low confidence scores
- Non-English review text may reduce accuracy or return unexpected sentiment labels
- Rate limiting or server overload may return 429 or 503

## How this service works

Paid x402 endpoints organized into product clusters. USDC-settled on Base. MCP-callable. ERC-8004 identity registry agentId 47167.

## Output

Returns a JSON object with: overall_sentiment (string label such as 'positive', 'negative', or 'mixed'), overall_score (float between -1 and 1 indicating sentiment polarity), and confidence (float 0–1 indicating model certainty).

## Request schema (JSON Schema)

```json
{
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "type": "object",
 "properties": {
  "input": {
   "type": "object",
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "type": "string",
     "enum": [
      "POST"
     ]
    },
    "bodyType": {
     "type": "string",
     "enum": [
      "json",
      "form-data",
      "text"
     ]
    },
    "body": {
     "properties": {
      "text": {
       "type": "string",
       "description": "Text to analyze. Max 12,000 chars."
      },
      "aspects": {
       "type": "array",
       "description": "Optional. Up to 15 aspect names (e.g. 'food', 'service') to score individually alongside overall sentiment."
      }
     },
     "required": [
      "text"
     ]
    }
   },
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "overall_sentiment": {
       "type": "string"
      },
      "overall_score": {
       "type": "number"
      },
      "confidence": {
       "type": "number"
      }
     }
    }
   },
   "required": [
    "type"
   ]
  }
 },
 "required": [
  "input"
 ]
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "confidence": 0.87,
  "overall_score": -0.28,
  "overall_sentiment": "mixed"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agentutility-app-review-sentiment-analyzer-3d16ede4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.agentutility.ai](https://www.zero.xyz/host/x402.agentutility.ai/llms.txt)