# Token Buy Receipt Shortfall — Adjacent Period Changes

> Token Buy Receipt Shortfall — 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 2026-10-12).

Computes adjacent-period changes in token buy receipt shortfall (expected vs actual tokens received) across a supplied sequence of observations.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-bx-token-buy-receipt-period-changes?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/token-buy-receipt-shortfall-adjacent-period-changes-54326e1d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_siVzvbiBImTwcFoIpExMb

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-receipt-shortfall-adjacent-period-changes-54326e1d -d '<json body>'
```

Example prompt: I have a series of token buy observations — expected 1000, got 950; expected 1100, got 1045; expected 1000, got 950; expected 1100, got 1045 — can you run the adjacent period changes report on that shortfall data?

## When to prefer this

Choose this endpoint when you have a sequence of token buy events with known expected and actual token counts and need a deterministic adjacent-period-change calculation on the shortfall — not a live market scan or predictive signal. Ideal for periodic auditing, batch shortfall trend analysis, or automated reporting pipelines where you supply your own observations and want a structured change report per period pair.

## Known failure modes

- Fewer than 2 rows supplied — minItems constraint violation
- Row missing expected_tokens or actual_tokens — required field error
- expected_tokens set to 0 — exclusiveMinimum constraint violation
- Values exceeding 10,000,000,000,000,000 — maximum constraint violation
- Malformed row objects with extra properties — additionalProperties:false rejection
- Empty array payload — schema validation failure

## How this service works

Token buy receipt shortfall — Adjacent period changes: Adjacent period changes for Token buy receipt shortfall. 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 bounded report showing the adjacent period-over-period changes in token buy receipt shortfall for each consecutive pair of supplied observations, computed deterministically from the provided expected_tokens and actual_tokens values. The output reflects how the gap between expected and actual tokens shifts from one period to the next, without live market scanning or trade recommendations.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "rows": {
   "type": "array",
   "items": {
    "type": "object",
    "required": [
     "expected_tokens",
     "actual_tokens"
    ],
    "properties": {
     "actual_tokens": {
      "type": "number",
      "default": 950,
      "maximum": 10000000000000000,
      "minimum": 0
     },
     "expected_tokens": {
      "type": "number",
      "default": 1000,
      "maximum": 10000000000000000,
      "minimum": 0,
      "exclusiveMinimum": 0
     }
    },
    "additionalProperties": false
   },
   "default": [
    {
     "actual_tokens": 950,
     "expected_tokens": 1000
    },
    {
     "actual_tokens": 1045,
     "expected_tokens": 1100
    },
    {
     "actual_tokens": 950,
     "expected_tokens": 1000
    },
    {
     "actual_tokens": 1045,
     "expected_tokens": 1100
    }
   ],
   "maxItems": 200,
   "minItems": 2
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/token-buy-receipt-shortfall-adjacent-period-changes-54326e1d/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)