# Token Price Change – Adjacent Period Changes

> Token Price Change – 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 2026-10-16).

Calculates price change metrics between adjacent observation periods for a batch of token price pairs

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-bx-token-price-change-period-changes?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/token-price-change-adjacent-period-changes-d45d4d85
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_eGQoiqTq74TKa8x4sxajR

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-price-change-adjacent-period-changes-d45d4d85 -d '<json body>'
```

Example prompt: I have a list of token price observations — can you calculate the adjacent period price changes for these pairs: current prices 1.20, 1.32 and previous prices 1.00, 1.10?

## When to prefer this

Choose this endpoint when you need a deterministic, batch computation of price changes between adjacent observation periods for token price pairs, without requiring a live market feed or external data source. It is ideal for post-hoc analysis, reporting pipelines, or signal preprocessing where you already have current and previous prices and need period-over-period deltas calculated reliably and cheaply at $0.01 per call.

## Known failure modes

- Fewer than 2 price pair rows supplied — minimum items validation error
- current_price or previous_price is zero or negative — exclusiveMinimum constraint violation
- More than 200 rows submitted — maxItems exceeded error
- Non-numeric price values cause schema validation failure
- Network or payment failure returns a 402 or 4xx error before computation

## How this service works

Token observed price change — Adjacent period changes: Adjacent period changes for Token observed price change. 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

Returns a bounded report of adjacent period price changes for each supplied current/previous price pair, including deterministic computed deltas (e.g. absolute and/or percentage change) between consecutive observations. No live market scan or trade recommendation is included.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "rows": {
   "type": "array",
   "items": {
    "type": "object",
    "required": [
     "current_price",
     "previous_price"
    ],
    "properties": {
     "current_price": {
      "type": "number",
      "default": 1.2,
      "maximum": 10000000000000000,
      "minimum": 0,
      "exclusiveMinimum": 0
     },
     "previous_price": {
      "type": "number",
      "default": 1,
      "maximum": 10000000000000000,
      "minimum": 0,
      "exclusiveMinimum": 0
     }
    },
    "additionalProperties": false
   },
   "default": [
    {
     "current_price": 1.2,
     "previous_price": 1
    },
    {
     "current_price": 1.32,
     "previous_price": 1.1
    },
    {
     "current_price": 1.2,
     "previous_price": 1
    },
    {
     "current_price": 1.32,
     "previous_price": 1.1
    }
   ],
   "maxItems": 200,
   "minItems": 2
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/token-price-change-adjacent-period-changes-d45d4d85/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)