# ClearCheck Custom Label Classifier

> ClearCheck Custom Label Classifier is a paid API for AI agents from loonie-toll.onrender.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Classifies a piece of text into one of your supplied labels, returning the winning label, confidence score, and a one-line reason.

## Facts

- Endpoint: GET https://loonie-toll.onrender.com/classify
- 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/clearcheck-custom-label-classifier-6d93d325
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_sYGb3rnI-bGU-w8PJ8ew7

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 clearcheck-custom-label-classifier-6d93d325
```

Example prompt: Classify this customer message — 'My invoice shows double charges for last month and I can't log in to fix it' — into one of these labels: billing, technical, account, sales. Give me the best label, your confidence, and a one-line reason.

## When to prefer this

Choose this endpoint when you need zero-shot text classification into your own arbitrary label set without training a custom model. It is ideal for routing, tagging, and triage tasks where the label taxonomy is defined by the caller and may change per request. Prefer it over fixed-category sentiment or topic APIs when the categories are domain-specific or dynamic.

## Known failure modes

- Missing 'text' or 'labels' query parameter returns an error
- Text exceeding 6000 characters may be rejected or truncated
- Ambiguous or overlapping labels may produce low confidence scores
- A single label supplied returns trivially with 100% confidence
- Non-English or mixed-language text may degrade classification accuracy
- Payment failure (x402) blocks the request from completing

## How this service works

Sort text into one of your own labels, with a confidence and a one-line reason. You supply the labels.

## Output

Returns the best-matching label from your supplied list, a numeric confidence score (0–1), a one-line reason explaining the classification, the full list of candidate labels, a verdict string, the model used, source attribution, and a disclaimer.

## 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",
     "required": [
      "text",
      "labels"
     ],
     "properties": {
      "text": {
       "type": "string",
       "description": "The text to work on. 6000 characters maximum."
      },
      "labels": {
       "type": "string",
       "description": "Comma-separated candidate labels, e.g. billing,technical,sales,spam"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "label": {
       "type": "string"
      },
      "model": {
       "type": "string"
      },
      "reason": {
       "type": "string"
      },
      "source": {
       "type": "string"
      },
      "verdict": {
       "type": "string"
      },
      "candidates": {
       "type": "array",
       "items": {
        "type": "string"
       }
      },
      "confidence": {
       "type": "number"
      },
      "disclaimer": {
       "type": "string"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/clearcheck-custom-label-classifier-6d93d325/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from loonie-toll.onrender.com](https://www.zero.xyz/host/loonie-toll.onrender.com/llms.txt)