# Marketing Contribution Return – Sequential Input-Change Attribution

> Marketing Contribution Return – 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 2026-10-18).

Calculates incremental effects on marketing contribution return by sequentially changing each input (marketing spend, attributed contribution) from baseline to final values in field order, producing a waterfall attribution report.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-finance-marketing-return-waterfall?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-18
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/marketing-contribution-return-sequential-input-change-attribution-37b81323
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_EyREEuJCfiTVdPC7TZBhN

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 marketing-contribution-return-sequential-input-change-attribution-37b81323 -d '<json body>'
```

Example prompt: Run a sequential input-change waterfall attribution on my marketing contribution return: baseline was $5,000 spend and $8,000 attributed contribution, final is $5,500 spend and $8,800 attributed contribution — show me the incremental effect of each change in field order.

## When to prefer this

Choose this endpoint when you need to understand not just the overall change in marketing contribution return, but how each individual input (spend, attributed contribution) contributed to that change in a specific declared sequence. It is ideal for waterfall/bridge chart analyses, period-over-period marketing reviews, and situations where you want a structured, formula-backed decomposition with explicit limitations disclosure rather than a simple delta calculation.

## Known failure modes

- Marketing spend must be strictly greater than zero — zero or negative spend values will fail validation
- Missing required fields in before or after objects will cause a schema validation error
- Extremely large or small values near the schema limits may produce edge-case numerical results
- Order-dependence of the waterfall means results are not symmetric — swapping before and after will yield different incremental effects

## How this service works

Marketing contribution return - Sequential input-change attribution: Change each input from baseline to final in declared field order, reporting each incremental effect; order dependent. Metric: Marketing contribution return. 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 sequential input-change attribution report.

## Output

A JSON object containing the sequential waterfall attribution of the marketing contribution return metric, including the incremental effect of changing each input (marketing spend first, then attributed contribution) from baseline to final values, along with the formula used, units, and stated limitations of the order-dependent analysis.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "after": {
   "type": "object",
   "default": {
    "marketing_spend": 5500,
    "attributed_contribution": 8800
   },
   "required": [
    "attributed_contribution",
    "marketing_spend"
   ],
   "properties": {
    "marketing_spend": {
     "type": "number",
     "default": 5000,
     "maximum": 1000000000000,
     "minimum": 0,
     "description": "Amount in a consistent supplied currency and reporting period",
     "exclusiveMinimum": 0
    },
    "attributed_contribution": {
     "type": "number",
     "default": 8000,
     "maximum": 1000000000000,
     "minimum": -1000000000000,
     "description": "Amount in a consistent supplied currency and reporting period"
    }
   },
   "additionalProperties": false
  },
  "before": {
   "type": "object",
   "default": {
    "marketing_spend": 5000,
    "attributed_contribution": 8000
   },
   "required": [
    "attributed_contribution",
    "marketing_spend"
   ],
   "properties": {
    "marketing_spend": {
     "type": "number",
     "default": 5000,
     "maximum": 1000000000000,
     "minimum": 0,
     "description": "Amount in a consistent supplied currency and reporting period",
     "exclusiveMinimum": 0
    },
    "attributed_contribution": {
     "type": "number",
     "default": 8000,
     "maximum": 1000000000000,
     "minimum": -1000000000000,
     "description": "Amount in a consistent supplied currency and reporting period"
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/marketing-contribution-return-sequential-input-change-attribution-37b81323/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)