# Event Attendance Category Frequencies

> Event Attendance Category Frequencies is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-19).

Computes frequency counts for each event type category across a batch of event attendance records

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-sector-analytics-event-attendance-category-counts?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-19
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/event-attendance-category-frequencies-49cf375f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_pzp4CnvFLTk1iREJuXY2A

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 event-attendance-category-frequencies-49cf375f -d '<json body>'
```

Example prompt: Can you count how many times each event type appears across these attendance records? I have up to 4 rows: row-1 on 2026-10-01 with event_type 'conference', 10 registrations, 8 attendees; row-2 on 2026-10-02 with event_type 'workshop', 5 registrations, 4 attendees; row-3 on 2026-10-03 with event_type 'conference', 12 registrations, 10 attendees; row-4 on 2026-10-04 with event_type 'webinar', 20 registrations, 18 attendees.

## When to prefer this

Choose this endpoint when you need a fast, low-cost ($0.01 USDC) frequency count of event type categories from a small batch of attendance records (up to 200 rows) and require only local numeric computation without external enrichment or forecasting. It is ideal for quick categorical summaries of event logs where simplicity and cost-efficiency matter.

## Known failure modes

- Empty or missing rows array returns validation error
- More than 200 rows submitted exceeds maxItems limit
- Missing required fields (row_id, event_type, date, registrations, attendees) causes record rejection
- Malformed date format (not YYYY-MM-DD) triggers pattern validation failure
- Non-numeric values for attendees or registrations cause type errors
- Payment not included or insufficient USDC results in 402 response

## How this service works

Event attendance - Category frequencies: Category frequencies for Event attendance. Up to 200 supplied typed records. Local numeric and data-quality processing; no external enrichment or forecasting. One of 25 profiles or calculations across 20 shared operations in this sector. 0.01 USDC includes one bounded category frequencies deliverable.

## Output

Returns frequency counts for each distinct event_type category found in the submitted records, indicating how many rows belong to each category. Output is a bounded deliverable reflecting local numeric aggregation with no external enrichment.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "rows": {
   "type": "array",
   "items": {
    "type": "object",
    "required": [
     "row_id",
     "event_type",
     "date",
     "registrations",
     "attendees"
    ],
    "properties": {
     "date": {
      "type": "string",
      "default": "",
      "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
      "maxLength": 10
     },
     "row_id": {
      "type": "string",
      "default": "",
      "maxLength": 80,
      "minLength": 1
     },
     "attendees": {
      "type": [
       "number",
       "null"
      ],
      "maximum": 1000000000000,
      "minimum": -1000000000000
     },
     "event_type": {
      "type": "string",
      "default": "",
      "maxLength": 80
     },
     "registrations": {
      "type": [
       "number",
       "null"
      ],
      "maximum": 1000000000000,
      "minimum": -1000000000000
     }
    },
    "additionalProperties": false
   },
   "default": [
    {
     "date": "2026-10-01",
     "row_id": "row-1",
     "attendees": 1,
     "event_type": "group-a",
     "registrations": 10
    },
    {
     "date": "2026-10-02",
     "row_id": "row-2",
     "attendees": 2,
     "event_type": "group-b",
     "registrations": 20
    },
    {
     "date": "2026-10-03",
     "row_id": "row-3",
     "attendees": 3,
     "event_type": "group-a",
     "registrations": 15
    },
    {
     "date": "2026-10-04",
     "row_id": "row-4",
     "attendees": 4,
     "event_type": "group-b",
     "registrations": 30
    }
   ],
   "maxItems": 200,
   "minItems": 1
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/event-attendance-category-frequencies-49cf375f/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)