# First-Attempt Delivery Share – Local Finite-Change Elasticity

> First-Attempt Delivery Share – 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 first-attempt delivery share with respect to a specified input field, given a baseline of attempted shipments and first-attempt deliveries.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-ar-retail-first-attempt-delivery-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/first-attempt-delivery-share-local-finite-change-elasticity-271a4510
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_9KBtoo2TVeAlHQ8Seityg

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 first-attempt-delivery-share-local-finite-change-elasticity-271a4510 -d '<json body>'
```

Example prompt: Calculate the local finite-change elasticity of our first-attempt delivery share with a baseline of 100 attempted shipments and 87 first-attempt deliveries, varying the attempted_shipments field by 1% steps.

## When to prefer this

Choose this endpoint when you need a quick, low-cost ($0.01 USDC) point estimate of how first-attempt delivery share responds to marginal changes in a specific input, using your own supplied retail data rather than live platform data. Ideal for sensitivity analysis and operational planning around last-mile delivery performance without requiring platform integration.

## Known failure modes

- Invalid baseline values (e.g. first_attempt_deliveries exceeds attempted_shipments) may produce illogical elasticity results
- step_percent outside the allowed 0.01–10 range will be rejected
- Missing required baseline fields returns a validation error
- Baseline values of zero for attempted_shipments will fail due to exclusiveMinimum constraint

## How this service works

First-attempt delivery share - Local finite-change elasticity: Local finite-change elasticity for First-attempt delivery share. Supplied retail figures only, up to 200 records. No platform access, live rates or order execution. One of 25 new profiles across 20 shared operations in this industry. 0.01 USDC includes one bounded local finite-change elasticity report.

## Output

Returns a bounded local finite-change elasticity report for first-attempt delivery share, including the elasticity coefficient showing how the share metric responds to a small percentage-point change in the selected input field near the provided baseline values. Up to 200 records supported per call.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "field": {
   "enum": [
    "attempted_shipments",
    "first_attempt_deliveries"
   ],
   "type": "string",
   "default": "attempted_shipments"
  },
  "baseline": {
   "type": "object",
   "default": {
    "attempted_shipments": 100,
    "first_attempt_deliveries": 87
   },
   "required": [
    "attempted_shipments",
    "first_attempt_deliveries"
   ],
   "properties": {
    "attempted_shipments": {
     "type": "number",
     "default": 100,
     "maximum": 1000000000000,
     "minimum": 0,
     "exclusiveMinimum": 0
    },
    "first_attempt_deliveries": {
     "type": "number",
     "default": 87,
     "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/first-attempt-delivery-share-local-finite-change-elasticity-271a4510/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)