# Issue Kind Top-k Label Coverage

> Issue Kind Top-k Label Coverage is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-22).

Computes top-k label coverage metrics for a naive-Bayes issue-kind classifier (bug/request/question/other) given up to 200 labelled text records with predicted probabilities.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-sector-ml-issue-kind-top-k?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-22
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/issue-kind-top-k-label-coverage-8e49673b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_d_5x6pJlHnBHx_C5SLlKJ

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 issue-kind-top-k-label-coverage-8e49673b -d '<json body>'
```

Example prompt: Compute top-2 label coverage for my issue kind classifier — I have 30 labelled records with text, actual labels (bug/request/question/other), predicted labels, and 4-class probability scores. Tell me what fraction of the time the correct label appears in the top 2 predictions.

## When to prefer this

Choose this endpoint when you need a lightweight, low-cost top-k coverage evaluation for a 4-class issue-kind classifier without access to a hosted ML platform. Ideal for small dataset audits (up to 200 records), rapid local-style evaluation of naive-Bayes or similar baselines, and scenarios where you already have predicted probabilities and just need the coverage metric computed. Not suitable for training models, handling larger datasets, or multi-class problems beyond the fixed bug/request/question/other taxonomy.

## Known failure modes

- More than 200 records submitted — exceeds maximum batch size
- probabilities array does not contain exactly 4 values per record
- k value outside allowed range of 1–4
- actual or predicted labels outside allowed enum values (bug/request/question/other)
- malformed record missing required fields (id, text, actual, predicted, probabilities)
- payment not received or x402 authentication failure

## How this service works

Issue kind - Top-k label coverage: Top-k label coverage for Issue kind. Up to 200 supplied labelled text records. Local dataset tools, evaluation and small naive-Bayes baselines; no hosted model or foundation-model training. One of 25 profiles or calculations across 20 shared operations in this sector. 0.01 USDC includes one bounded top-k label coverage deliverable.

## Output

Returns a bounded top-k label coverage deliverable: a metric (or set of metrics) indicating the proportion of supplied labelled records for which the true label appears within the top k ranked predictions by probability, computed over the 4-class issue-kind label set (bug, request, question, other).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "k": {
   "type": "integer",
   "default": 2,
   "maximum": 4,
   "minimum": 1
  },
  "records": {
   "type": "array",
   "items": {
    "type": "object",
    "required": [
     "id",
     "text",
     "actual",
     "predicted",
     "probabilities"
    ],
    "properties": {
     "id": {
      "type": "string",
      "default": "",
      "maxLength": 80,
      "minLength": 1
     },
     "text": {
      "type": "string",
      "default": "",
      "maxLength": 1000
     },
     "actual": {
      "enum": [
       "bug",
       "request",
       "question",
       "other"
      ],
      "type": "string"
     },
     "predicted": {
      "enum": [
       "bug",
       "request",
       "question",
       "other"
      ],
      "type": "string"
     },
     "probabilities": {
      "type": "array",
      "items": {
       "type": "number",
       "default": 0,
       "maximum": 1,
       "minimum": 0
      },
      "default": [],
      "maxItems": 4,
      "minItems": 4
     }
    },
    "additionalProperties": false
   },
   "default": [
    {
     "id": "example-0-0",
     "text": "bug sample document number 0 for this supplied dataset.",
     "actual": "bug",
     "predicted": "bug",
     "probabilities": [
      0.8,
      0.06666666666666667,
      0.06666666666666667,
      0.06666666666666667
     ]
    },
    {
     "id": "example-0-1",
     "text": "bug sample document number 1 for this supplied dataset.",
     "actual": "bug",
     "predicted": "bug",
     "probabilities": [
      0.8,
      0.06666666666666667,
      0.06666666666666667,
      0.06666666666666667
     ]
    },
    {
     "id": "example-0-2",
     "text": "bug sample document number 2 for this supplied dataset.",
     "actual": "bug",
     "predicted": "bug",
     "probabilities": [
      0.8,
      0.06666666666666667,
      0.06666666666666667,
      0.06666666666666667
     ]
    },
    {
     "id": "example-1-0",
     "text": "request sample document number 0 for this supplied dataset.",
     "actual": "request",
     "predicted": "request",
     "probabilities": [
      0.06666666666666667,
      0.8,
      0.06666666666666667,
      0.06666666666666667
     ]
    },
    {
     "id": "example-1-1",
     "text": "request sample document number 1 for this supplied dataset.",
     "actual": "request",
     "predicted": "request",
     "probabilities": [
      0.06666666666666667,
      0.8,
      0.06666666666666667,
      0.066666666666666
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/issue-kind-top-k-label-coverage-8e49673b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from market.datapackvibe.com](https://www.zero.xyz/host/market.datapackvibe.com/llms.txt)