# Token Assessment Evidence Coverage — Adjacent Period Changes

> Token Assessment Evidence Coverage — 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 evidence coverage for token assessment observations, returning a deterministic or threshold-based verdict per row.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-bx-token-evidence-coverage-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-assessment-evidence-coverage-adjacent-period-changes-2c00adbb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ycgv2OzWmvROyEV-1DkIA

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-assessment-evidence-coverage-adjacent-period-changes-2c00adbb -d '<json body>'
```

Example prompt: Run an adjacent period changes report for token evidence coverage using these two observation pairs: first period had 8 observed fields out of 10 requested, second period had 8.8 observed out of 11 requested — tell me how the coverage shifted between them.

## When to prefer this

Choose this endpoint when you need a fast, deterministic computation of how token assessment evidence coverage changed between adjacent time periods, given pairs of observed vs requested field counts. Prefer it over general analytics tools when you need a bounded, pre-specified report format with optional caller-defined threshold verdicts, and when you are working within the datapackvibe token assessment preset suite. Not suitable for live token scanning, real-time market data, or trade recommendations.

## Known failure modes

- Array has fewer than 2 rows — minimum 2 row items required
- requested_fields is zero or negative — field has exclusiveMinimum of 0
- Array exceeds 200 items — maxItems limit exceeded
- observed_fields or requested_fields out of valid numeric range
- Malformed row object with extra properties — additionalProperties not allowed
- Payment not supplied or insufficient — endpoint requires 0.01 USDC per call via x402

## How this service works

Token assessment evidence coverage — Adjacent period changes: Adjacent period changes for Token assessment evidence coverage. 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 computed adjacent period changes in token evidence coverage for each row submitted, including coverage deltas between consecutive observed/requested field pairs and a deterministic or caller-threshold verdict. Does not perform live scanning or provide trade recommendations.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "rows": {
   "type": "array",
   "items": {
    "type": "object",
    "required": [
     "observed_fields",
     "requested_fields"
    ],
    "properties": {
     "observed_fields": {
      "type": "number",
      "default": 8,
      "maximum": 10000000000000000,
      "minimum": 0
     },
     "requested_fields": {
      "type": "number",
      "default": 10,
      "maximum": 10000000000000000,
      "minimum": 0,
      "exclusiveMinimum": 0
     }
    },
    "additionalProperties": false
   },
   "default": [
    {
     "observed_fields": 8,
     "requested_fields": 10
    },
    {
     "observed_fields": 8.8,
     "requested_fields": 11
    },
    {
     "observed_fields": 8,
     "requested_fields": 10
    },
    {
     "observed_fields": 8.8,
     "requested_fields": 11
    }
   ],
   "maxItems": 200,
   "minItems": 2
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/token-assessment-evidence-coverage-adjacent-period-changes-2c00adbb/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)