# Price Index Inflation Rate Batch Calculator

> Price Index Inflation Rate Batch Calculator is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-22).

Calculates price index inflation rates for up to 200 rows of current/previous index pairs, returning results with formula, units, and limitations in JSON format.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-finance-inflation-change-batch?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-22
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/price-index-inflation-rate-batch-calculator-a4b89b93
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_DneBAh9YU14kjKKjmiz45

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 price-index-inflation-rate-batch-calculator-a4b89b93 -d '<json body>'
```

Example prompt: Can you calculate the inflation rate for these 3 index pairs: current 110 vs previous 100, current 121 vs previous 110, and current 133.1 vs previous 121? I need the formula and any notes on limitations too.

## When to prefer this

Choose this endpoint when you need to batch-calculate price index inflation rates for multiple data rows (up to 200) in a single call, especially when you also need formula documentation and invalid-row detection. Prefer it over single-row calculators when processing multiple periods or categories at once. Best for offline/supplied data analysis rather than live market feeds.

## Known failure modes

- Row missing required current_index or previous_index fields
- current_index or previous_index value is zero or negative (exclusiveMinimum constraint)
- Array exceeds 200 items (maxItems constraint)
- Empty array submitted (minItems constraint)
- Index values exceed maximum of 1,000,000,000,000
- Payment of 0.01 USDC not provided or rejected
- Malformed JSON body

## How this service works

Price index inflation rate - Batch calculation: Calculate up to 200 supplied records and locate invalid rows. Metric: Price index inflation rate. Supplied figures only; returns JSON with formula, units and limitations. One of 50 calculators with 20 analysis modes. No live feed, financial advice or trade execution. 0.01 USDC includes one bounded batch calculation report.

## Output

A JSON object containing the inflation rate calculation results for each submitted row, including the formula used, units, any identified invalid rows, and limitations of the calculation. Up to 200 rows processed per call.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "rows": {
   "type": "array",
   "items": {
    "type": "object",
    "required": [
     "current_index",
     "previous_index"
    ],
    "properties": {
     "current_index": {
      "type": "number",
      "default": 110,
      "maximum": 1000000000000,
      "minimum": 0,
      "description": "Amount in a consistent supplied currency and reporting period",
      "exclusiveMinimum": 0
     },
     "previous_index": {
      "type": "number",
      "default": 100,
      "maximum": 1000000000000,
      "minimum": 0,
      "description": "Amount in a consistent supplied currency and reporting period",
      "exclusiveMinimum": 0
     }
    },
    "additionalProperties": false
   },
   "default": [
    {
     "current_index": 110,
     "previous_index": 100
    },
    {
     "current_index": 121.00000000000001,
     "previous_index": 110.00000000000001
    }
   ],
   "maxItems": 200,
   "minItems": 1
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/price-index-inflation-rate-batch-calculator-a4b89b93/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)