# Membership Activity Base-100 Index Series

> Membership Activity Base-100 Index Series is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-15).

Converts raw membership activity records (members, renewals) into a base-100 indexed time series, normalized relative to a chosen baseline row.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-sector-analytics-membership-index?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/membership-activity-base-100-index-series-3cd56302
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_dkRy5j8SbKvqRqDSU_qR7

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 membership-activity-base-100-index-series-3cd56302 -d '<json body>'
```

Example prompt: Take my daily membership data for two tiers — Premium (300 members, 25 renewals on 2025-01-01; 340 members, 28 renewals on 2025-01-02; 360 members, 30 renewals on 2025-01-03) and Basic (500 members, 40 renewals on 2025-01-01; 520 members, 42 renewals on 2025-01-02; 490 members, 38 renewals on 2025-01-03) — and give me a base-100 index series for the 'members' field, using row 0 as the baseline.

## When to prefer this

Choose this endpoint when you need to normalize membership or renewal time series data to a common base-100 scale for trend comparison, benchmarking, or growth analysis — especially across multiple tiers. It handles up to 200 records locally with no external dependencies, making it fast, deterministic, and cost-effective at $0.01 per call. Prefer it over raw aggregation endpoints when the goal is relative indexed comparison rather than absolute counts.

## Known failure modes

- Fewer than 1 row supplied — minItems violation returns validation error
- base_index out of range (>=200 or >= number of rows supplied) — returns schema validation error
- Null values in the selected field for the base row — division by zero or indeterminate base causes processing error
- Invalid date format (not YYYY-MM-DD) — pattern validation failure
- Rows exceed 200 item limit — maxItems violation
- field value not in enum ['members','renewals'] — schema rejection

## How this service works

Membership activity - Base-100 series: Base-100 series for Membership activity. 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 base-100 series deliverable.

## Output

A base-100 indexed series derived from the selected numeric field (members or renewals), where the chosen base_index row is set to 100 and all other rows are expressed as proportional values relative to it. Up to 200 typed records processed locally with numeric and data-quality checks, no external enrichment. Output includes one bounded base-100 series deliverable per call.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "rows": {
   "type": "array",
   "items": {
    "type": "object",
    "required": [
     "row_id",
     "tier",
     "date",
     "members",
     "renewals"
    ],
    "properties": {
     "date": {
      "type": "string",
      "default": "",
      "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
      "maxLength": 10
     },
     "tier": {
      "type": "string",
      "default": "",
      "maxLength": 80
     },
     "row_id": {
      "type": "string",
      "default": "",
      "maxLength": 80,
      "minLength": 1
     },
     "members": {
      "type": [
       "number",
       "null"
      ],
      "maximum": 1000000000000,
      "minimum": -1000000000000
     },
     "renewals": {
      "type": [
       "number",
       "null"
      ],
      "maximum": 1000000000000,
      "minimum": -1000000000000
     }
    },
    "additionalProperties": false
   },
   "default": [
    {
     "date": "2026-10-01",
     "tier": "group-a",
     "row_id": "row-1",
     "members": 10,
     "renewals": 1
    },
    {
     "date": "2026-10-02",
     "tier": "group-b",
     "row_id": "row-2",
     "members": 20,
     "renewals": 2
    },
    {
     "date": "2026-10-03",
     "tier": "group-a",
     "row_id": "row-3",
     "members": 15,
     "renewals": 3
    },
    {
     "date": "2026-10-04",
     "tier": "group-b",
     "row_id": "row-4",
     "members": 30,
     "renewals": 4
    }
   ],
   "maxItems": 200,
   "minItems": 1
  },
  "field": {
   "enum": [
    "members",
    "renewals"
   ],
   "type": "string",
   "default": "members"
  },
  "base_index": {
   "type": "integer",
   "default": 0,
   "maximum": 199,
   "minimum": 0
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/membership-activity-base-100-index-series-3cd56302/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)