# Study Recruitment Numeric Row Ordering and Base-100 Series

> Study Recruitment Numeric Row Ordering and Base-100 Series is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-11-04).

Assigns numeric row order ranks and computes a base-100 index series for study recruitment data (eligible_candidates or enrolled_candidates) across up to 200 supplied rows.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-ib26-education-09-117?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-11-04
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/study-recruitment-numeric-row-ordering-and-base-100-series-f538032c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_wSLAIQhxapX49d7JmCLEL

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 study-recruitment-numeric-row-ordering-and-base-100-series-f538032c -d '<json body>'
```

Example prompt: Rank and base-100 index my study recruitment rows using the eligible_candidates field, starting the index at row 0 — here are 4 records: row-1 on 2026-10-01 for group-a with 10 eligible and 1 enrolled, row-2 on 2026-10-02 for group-b with 20 eligible and 2 enrolled, row-3 on 2026-10-03 for group-a with 15 eligible and 3 enrolled, and row-4 on 2026-10-04 for group-b with 30 eligible and 4 enrolled.

## When to prefer this

Choose this endpoint when you have up to 200 study recruitment records and need both numeric row ranking and a base-100 index series for either eligible or enrolled candidate counts in a single low-cost call. It is best for offline/supplied-data analytical workflows where no live data lookup, prediction, or external action is needed. Prefer it over generic analytics tools when you want two bundled reports (ranking + indexing) in one $0.01 USDC payment.

## Known failure modes

- Missing required fields (row_id, date, course_group) cause validation errors
- Submitting more than 200 rows exceeds the maximum and is rejected
- Invalid date format (not YYYY-MM-DD) causes a schema validation failure
- Null values in the base_index row for the selected field may cause division errors in the base-100 calculation
- base_index pointing beyond the last row index returns an error

## How this service works

Study recruitment — Numeric row ordering + Base-100 series: Numeric row ordering + Base-100 series for supplied study recruitment records (eligible_candidates, enrolled_candidates). Up to 200 rows; 2 independent reports using shared local analytical engines. No live lookup, prediction, professional assessment or external action. 0.01 USDC includes 2 supplied-data reports for up to 200 rows.

## Output

Returns two independent reports for the supplied rows: (1) numeric row ordering ranks for each record, and (2) a base-100 index series for the chosen field (eligible_candidates or enrolled_candidates) anchored to the specified base_index row. Covers up to 200 rows, computed locally with no external lookups.

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/study-recruitment-numeric-row-ordering-and-base-100-series-f538032c/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)