# Token Buy Volume Fraction — Adjacent Period Changes

> Token Buy Volume Fraction — Adjacent Period Changes is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-17).

Computes period-over-period changes in the buy volume fraction (buy volume as a share of total volume) for a token across a sequence of time periods.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-bx-token-buy-volume-share-period-changes?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/token-buy-volume-fraction-adjacent-period-changes-e2331831
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_jlVHcusmcfNz5aFzzx7qt

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 token-buy-volume-fraction-adjacent-period-changes-e2331831 -d '<json body>'
```

Example prompt: Calculate the adjacent period changes in buy volume fraction for these four periods: buy 60000 / sell 40000, then 66000 / 44000, then 60000 / 40000, then 66000 / 44000 — I want to see how the buy share shifted from one period to the next.

## When to prefer this

Use this endpoint when you have a time-ordered sequence of buy and sell volume observations for a token and want to measure how the buy fraction (buying pressure share) changed between each consecutive period. Prefer this over raw volume endpoints when you need relative buy dominance trends rather than absolute volumes, and when you want a deterministic, bounded calculation rather than a live market scan.

## Known failure modes

- Fewer than 2 rows provided — minimum 2 rows required
- buy_volume or sell_volume is zero or missing — both must be positive non-zero numbers
- More than 200 rows supplied — exceeds maxItems limit
- Non-numeric values passed for buy_volume or sell_volume — schema validation error
- Payment not processed — x402 payment of 0.01 USDC required per call

## How this service works

Token buy volume fraction — Adjacent period changes: Adjacent period changes for Token buy volume fraction. Supplied token observations only. Deterministic calculation or caller-threshold verdict, not a live scan, safety proof or trade recommendation. Specialised preset in a shared 50-profile, 20-operation engine. 0.01 USDC includes one bounded adjacent period changes report.

## Output

A report of period-over-period (adjacent) changes in the buy volume fraction (buy_volume / (buy_volume + sell_volume)) for each consecutive pair of input rows, computed deterministically from the supplied data. No live market scan or trade recommendation is included.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "rows": {
   "type": "array",
   "items": {
    "type": "object",
    "required": [
     "buy_volume",
     "sell_volume"
    ],
    "properties": {
     "buy_volume": {
      "type": "number",
      "default": 60000,
      "maximum": 10000000000000000,
      "minimum": 0,
      "exclusiveMinimum": 0
     },
     "sell_volume": {
      "type": "number",
      "default": 40000,
      "maximum": 10000000000000000,
      "minimum": 0,
      "exclusiveMinimum": 0
     }
    },
    "additionalProperties": false
   },
   "default": [
    {
     "buy_volume": 60000,
     "sell_volume": 40000
    },
    {
     "buy_volume": 66000,
     "sell_volume": 44000
    },
    {
     "buy_volume": 60000,
     "sell_volume": 40000
    },
    {
     "buy_volume": 66000,
     "sell_volume": 44000
    }
   ],
   "maxItems": 200,
   "minItems": 2
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/token-buy-volume-fraction-adjacent-period-changes-e2331831/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)