# Bundle Contribution - Local Finite-Change Elasticity

> Bundle Contribution - Local Finite-Change Elasticity is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-19).

Computes the local finite-change elasticity of bundle contribution margin with respect to a specified cost or price field, given a retail bundle scenario.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-sector-retail-bundle-contribution-elasticity?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-19
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/bundle-contribution-local-finite-change-elasticity-899fc585
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_w_czIalGA-SigkedSLeIR

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 bundle-contribution-local-finite-change-elasticity-899fc585 -d '<json body>'
```

Example prompt: Calculate the local finite-change elasticity of bundle contribution with respect to bundle_price, using a baseline of item costs $50, bundle price $100, packing cost $5, and fulfilment cost $10, with a step size of 1%.

## When to prefer this

Use this endpoint when you need a quick, local sensitivity or elasticity calculation for a retail bundle's contribution margin and have all baseline figures available. It is ideal for offline scenario analysis, pricing decisions, and cost-sensitivity studies where no live inventory, platform fee lookup, or order execution is required. Prefer this over general analytics tools when you need a bounded, interpretable elasticity number rather than a full optimization or forecasting model.

## Known failure modes

- Invalid or missing baseline fields returns a validation error
- step_percent outside allowed range (0.01–10) is rejected
- Non-numeric values for cost or price fields cause schema errors
- Bundle price of zero may produce division-by-zero or undefined elasticity results
- Missing required baseline properties returns an error

## How this service works

Bundle contribution - Local finite-change elasticity: Local finite-change elasticity for Bundle contribution. Supplied retail figures only. Local calculation and scenario analysis; no live inventory, account access, platform fee lookup or order execution. One of 25 profiles or calculations across 20 shared operations in this sector. 0.01 USDC includes one bounded local finite-change elasticity deliverable.

## Output

Returns a numeric finite-change elasticity value representing how much the bundle contribution margin changes (proportionally) for a given percentage perturbation in the selected field, based entirely on the supplied baseline figures — no live data or external lookup involved.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "field": {
   "enum": [
    "bundle_price",
    "item_costs",
    "packing_cost",
    "fulfilment_cost"
   ],
   "type": "string",
   "default": "bundle_price"
  },
  "baseline": {
   "type": "object",
   "default": {
    "item_costs": 50,
    "bundle_price": 100,
    "packing_cost": 5,
    "fulfilment_cost": 10
   },
   "required": [
    "bundle_price",
    "item_costs",
    "packing_cost",
    "fulfilment_cost"
   ],
   "properties": {
    "item_costs": {
     "type": "number",
     "default": 50,
     "maximum": 1000000000000,
     "minimum": 0
    },
    "bundle_price": {
     "type": "number",
     "default": 100,
     "maximum": 1000000000000,
     "minimum": 0
    },
    "packing_cost": {
     "type": "number",
     "default": 5,
     "maximum": 1000000000000,
     "minimum": 0
    },
    "fulfilment_cost": {
     "type": "number",
     "default": 10,
     "maximum": 1000000000000,
     "minimum": 0
    }
   },
   "additionalProperties": false
  },
  "step_percent": {
   "type": "number",
   "default": 1,
   "maximum": 10,
   "minimum": 0.01
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/bundle-contribution-local-finite-change-elasticity-899fc585/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)