# Solo Reward Poisson Standard Deviation — Sequential Input-Change Attribution

> Solo Reward Poisson Standard Deviation — Sequential Input-Change Attribution 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).

Computes a waterfall-style sequential input-change attribution report for the Poisson standard deviation of a solo Bitcoin mining reward, given before and after mining assumptions.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-bx-mining-reward-deviation-waterfall?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/solo-reward-poisson-standard-deviation-sequential-input-change-29c2b9c7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_EucHeIyWnNa7-Gd5ryDDF

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 solo-reward-poisson-standard-deviation-sequential-input-change-29c2b9c7 -d '<json body>'
```

Example prompt: Show me the sequential input-change attribution for the Poisson standard deviation of my solo Bitcoin mining reward — before was 3.125 BTC reward and 4 expected blocks, after is 3.4375 BTC reward and 4.4 expected blocks. Which input drove more of the std dev shift?

## When to prefer this

Choose this endpoint when you need to understand not just how the Poisson standard deviation of a solo mining reward changed between two scenarios, but specifically which input (reward_btc vs expected_blocks) was responsible for how much of that change — i.e., you want a sequential waterfall attribution rather than a simple before/after delta or a weighted mean comparison. Prefer it over the single-calculation or batch endpoints when the goal is causal decomposition of a two-scenario shift.

## Known failure modes

- Missing required field in 'before' or 'after' object returns a validation error
- reward_btc or expected_blocks set to zero or negative violates exclusiveMinimum constraint
- Malformed JSON body returns a 400-level error
- Payment not included or insufficient USDC results in a 402 Payment Required response
- Extremely large numeric values may produce overflow or precision issues

## How this service works

Solo reward Poisson standard deviation — Sequential input-change attribution: Sequential input-change attribution for Solo reward Poisson standard deviation. 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 sequential input-change attribution report.

## Output

A bounded sequential input-change attribution report showing how the change in each supplied mining input (reward_btc and expected_blocks) individually contributes to the total change in the Poisson standard deviation of the solo mining reward, presented as a waterfall decomposition. Formula and units are disclosed; no live prices or guaranteed return data are included.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "after": {
   "type": "object",
   "default": {
    "reward_btc": 3.4375000000000004,
    "expected_blocks": 4.4
   },
   "required": [
    "expected_blocks",
    "reward_btc"
   ],
   "properties": {
    "reward_btc": {
     "type": "number",
     "default": 3.125,
     "maximum": 10000000000000000,
     "minimum": 0,
     "exclusiveMinimum": 0
    },
    "expected_blocks": {
     "type": "number",
     "default": 4,
     "maximum": 10000000000000000,
     "minimum": 0,
     "exclusiveMinimum": 0
    }
   },
   "additionalProperties": false
  },
  "before": {
   "type": "object",
   "default": {
    "reward_btc": 3.125,
    "expected_blocks": 4
   },
   "required": [
    "expected_blocks",
    "reward_btc"
   ],
   "properties": {
    "reward_btc": {
     "type": "number",
     "default": 3.125,
     "maximum": 10000000000000000,
     "minimum": 0,
     "exclusiveMinimum": 0
    },
    "expected_blocks": {
     "type": "number",
     "default": 4,
     "maximum": 10000000000000000,
     "minimum": 0,
     "exclusiveMinimum": 0
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/solo-reward-poisson-standard-deviation-sequential-input-change-29c2b9c7/health.json
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