# Mining Operating Contribution Margin — Adjacent Period Changes

> Mining Operating Contribution Margin — 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 2026-10-15).

Calculates adjacent period changes in mining operating contribution margin rate given pairs of revenue and contribution data rows.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-bx-mining-cash-margin-rate-period-changes?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/mining-operating-contribution-margin-adjacent-period-changes-ec2ed002
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_hZlOBlq1EncCQlueYr4BG

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 mining-operating-contribution-margin-adjacent-period-changes-ec2ed002 -d '<json body>'
```

Example prompt: Can you calculate the adjacent period changes in mining contribution margin rate for these four periods: period 1 had $500,000 revenue and $125,000 contribution, period 2 had $550,000 revenue and $140,000 contribution, period 3 had $480,000 revenue and $110,000 contribution, and period 4 had $600,000 revenue and $165,000 contribution?

## When to prefer this

Choose this endpoint when you need period-over-period changes in mining contribution margin rates specifically — it is purpose-built for the mining domain with preset assumptions and formula disclosure, rather than a generic financial computation tool. Prefer it when you have 2–200 periods of revenue and contribution data and need a structured margin delta report for $0.01 USDC per call.

## Known failure modes

- Fewer than 2 rows provided — minimum 2 rows required
- revenue_usd is zero or missing — exclusiveMinimum of 0 required
- More than 200 rows submitted — maxItems limit exceeded
- contribution_usd exceeds magnitude bounds — values outside [-1T, 10P] rejected
- Malformed input structure — additionalProperties not allowed in row objects

## How this service works

Mining operating contribution margin — Adjacent period changes: Adjacent period changes for Mining operating contribution margin. Supplied mining assumptions only; formula and units disclosed. No live prices, mining or guaranteed return. Specialised preset in a shared 50-profile, 20-operation engine. 0.01 USDC includes one bounded adjacent period changes report.

## Output

A bounded adjacent period changes report showing how the mining operating contribution margin rate (contribution_usd/revenue_usd) shifted between each consecutive pair of input periods, including calculated rates and period-over-period deltas. Formula and units are disclosed in the response.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "rows": {
   "type": "array",
   "items": {
    "type": "object",
    "required": [
     "contribution_usd",
     "revenue_usd"
    ],
    "properties": {
     "revenue_usd": {
      "type": "number",
      "default": 100,
      "maximum": 10000000000000000,
      "minimum": 0,
      "exclusiveMinimum": 0
     },
     "contribution_usd": {
      "type": "number",
      "default": 25,
      "maximum": 10000000000000000,
      "minimum": -1000000000000
     }
    },
    "additionalProperties": false
   },
   "default": [
    {
     "revenue_usd": 100,
     "contribution_usd": 25
    },
    {
     "revenue_usd": 110.00000000000001,
     "contribution_usd": 27.500000000000004
    },
    {
     "revenue_usd": 100,
     "contribution_usd": 25
    },
    {
     "revenue_usd": 110.00000000000001,
     "contribution_usd": 27.500000000000004
    }
   ],
   "maxItems": 200,
   "minItems": 2
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/mining-operating-contribution-margin-adjacent-period-changes-ec2ed002/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)