# Research Task Completion — Daily Sum Series + Equal-Width Histogram

> Research Task Completion — Daily Sum Series + Equal-Width Histogram is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-17).

Generates a daily sum time series and an equal-width histogram for up to 200 research task completion records (completed_tasks or assigned_tasks), returning two analytical reports per call.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-ib26-company-22-139?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-17
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/research-task-completion-daily-sum-series-equal-width-histogram-b4df2da4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap__LESFFJc-XE252GP4wUYY

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 research-task-completion-daily-sum-series-equal-width-histogram-b4df2da4 -d '<json body>'
```

Example prompt: Take these 4 research task records for groups A and B — dates 2026-10-01 through 2026-10-04 with completed_tasks values 10, 20, 15, 30 — and give me a daily sum series plus an equal-width histogram with 5 bins for the completed_tasks field.

## When to prefer this

Choose this endpoint when you have up to 200 rows of research task completion records and need both a daily aggregated time series AND a histogram in a single low-cost call ($0.01 USDC). It is ideal for lightweight, self-contained analytical summaries without requiring an external BI tool, database, or live data connection. Prefer it over general analytics platforms when the data is already structured and fits the schema, and you need fast, deterministic local computation without side effects.

## Known failure modes

- More than 200 rows submitted — request rejected or truncated
- Invalid date format (must match YYYY-MM-DD pattern) — validation error
- Missing required row fields (row_id, date, completed_tasks, assigned_tasks) — schema validation failure
- bins value outside 1–30 range — request rejected
- All values null for selected field — histogram may be empty or error
- Payment of 0.01 USDC not provided — 402 Payment Required

## How this service works

Research task completion — Daily sum series + Equal-width histogram: Daily sum series + Equal-width histogram for supplied research task completion records (completed_tasks, assigned_tasks). 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 analytical reports: (1) a daily sum series aggregating the selected field (completed_tasks or assigned_tasks) by date, and (2) an equal-width histogram with the specified number of bins showing frequency distribution of the selected field across the supplied rows.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "bins": {
   "type": "integer",
   "default": 5,
   "maximum": 30,
   "minimum": 1
  },
  "rows": {
   "type": "array",
   "items": {
    "type": "object",
    "required": [
     "row_id",
     "company_group",
     "date",
     "completed_tasks",
     "assigned_tasks"
    ],
    "properties": {
     "date": {
      "type": "string",
      "default": "",
      "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
      "maxLength": 10
     },
     "row_id": {
      "type": "string",
      "default": "",
      "maxLength": 80,
      "minLength": 1
     },
     "company_group": {
      "type": "string",
      "default": "",
      "maxLength": 80
     },
     "assigned_tasks": {
      "type": [
       "number",
       "null"
      ],
      "maximum": 1000000000000,
      "minimum": -1000000000000
     },
     "completed_tasks": {
      "type": [
       "number",
       "null"
      ],
      "maximum": 1000000000000,
      "minimum": -1000000000000
     }
    },
    "additionalProperties": false
   },
   "default": [
    {
     "date": "2026-10-01",
     "row_id": "row-1",
     "company_group": "group-a",
     "assigned_tasks": 1,
     "completed_tasks": 10
    },
    {
     "date": "2026-10-02",
     "row_id": "row-2",
     "company_group": "group-b",
     "assigned_tasks": 2,
     "completed_tasks": 20
    },
    {
     "date": "2026-10-03",
     "row_id": "row-3",
     "company_group": "group-a",
     "assigned_tasks": 3,
     "completed_tasks": 15
    },
    {
     "date": "2026-10-04",
     "row_id": "row-4",
     "company_group": "group-b",
     "assigned_tasks": 4,
     "completed_tasks": 30
    }
   ],
   "maxItems": 200,
   "minItems": 1
  },
  "field": {
   "enum": [
    "completed_tasks",
    "assigned_tasks"
   ],
   "type": "string",
   "default": "completed_tasks"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/research-task-completion-daily-sum-series-equal-width-histogram-b4df2da4/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)