# Membership Activity Adjacent Row Changes

> Membership Activity Adjacent Row Changes 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 row-over-row changes in membership metrics (members or renewals) across up to 200 typed records, locally, with no external enrichment.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-sector-analytics-membership-period-change?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/membership-activity-adjacent-row-changes-88ea848b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_DEKqz5M2DHW-AEZc6YGKS

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-adjacent-row-changes-88ea848b -d '<json body>'
```

Example prompt: Calculate the adjacent row changes for my membership data — I have 4 records with dates 2026-10-01 through 2026-10-04 for group-a and group-b tiers with member counts 10, 20, 15, 30 and I want to track changes in the members field.

## When to prefer this

Choose this endpoint when you need fast, local, bounded row-over-row delta computation on membership data (members or renewals) with no external API dependencies, ideal for small-to-medium datasets up to 200 records where you want deterministic numeric results at minimal cost ($0.01 USDC per call).

## Known failure modes

- Fewer than 1 row submitted returns an error
- More than 200 rows submitted exceeds the maxItems limit
- Invalid date format (not YYYY-MM-DD) causes schema validation failure
- Missing required fields (row_id, tier, date, members, renewals) causes rejection
- Field value not in enum ['members','renewals'] causes validation error
- Numeric values outside allowed range cause rejection

## How this service works

Membership activity - Adjacent row changes: Adjacent row changes 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 adjacent row changes deliverable.

## Output

Returns computed adjacent row changes (period-over-period deltas) for the selected field (members or renewals) across the submitted rows, preserving row identifiers and tier groupings with no external data enrichment applied.

## 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"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/membership-activity-adjacent-row-changes-88ea848b/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)