# Token Observed Price Change — Distribution Summary

> Token Observed Price Change — Distribution Summary 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).

Computes a statistical distribution summary of observed price changes across a batch of token price pairs (current vs previous price).

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-bx-token-price-change-summary?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-observed-price-change-distribution-summary-68585214
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_QIKBSjNkzOszo6dEkBzBK

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-observed-price-change-distribution-summary-68585214 -d '<json body>'
```

Example prompt: Can you give me a distribution summary of the price changes for these token observations — I have pairs of current and previous prices: [{current: 1.20, previous: 1.00}, {current: 1.32, previous: 1.10}, {current: 0.95, previous: 1.05}, {current: 2.10, previous: 1.80}]?

## When to prefer this

Choose this endpoint when you need a statistical distribution summary of token price changes from a fixed set of your own observations (up to 200 pairs) and want a deterministic, bounded report rather than a live market feed or external data lookup. Ideal for post-hoc analysis, backtesting snapshots, or aggregating price movement data you have already collected.

## Known failure modes

- Fewer than 2 price pair rows submitted — minimum 2 items required
- current_price or previous_price set to zero or negative — exclusiveMinimum: 0 enforced
- More than 200 rows submitted — maxItems limit exceeded
- Malformed row objects or extra properties — additionalProperties: false enforced
- Payment not processed — x402 payment of 0.01 USDC required per call

## How this service works

Token observed price change — Distribution summary: Distribution summary 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 distribution summary report.

## Output

A bounded distribution summary report describing the statistical shape of observed price changes across the submitted token price pairs, including metrics such as range, spread, and frequency distribution. The report is a deterministic calculation based solely on the supplied observations — not a live market scan or trade signal.

## 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-observed-price-change-distribution-summary-68585214/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)