# Token Buy Volume Fraction — Local Finite-Change Elasticity

> Token Buy Volume Fraction — 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 2026-10-12).

Calculates the local finite-change elasticity of the token buy volume fraction given baseline buy/sell volumes and a percentage step size.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-bx-token-buy-volume-share-elasticity?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/token-buy-volume-fraction-local-finite-change-elasticity-a944afab
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_PqQP0O5pn_oIG9k6vrSul

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 token-buy-volume-fraction-local-finite-change-elasticity-a944afab -d '<json body>'
```

Example prompt: Calculate the local finite-change elasticity of the token buy volume fraction using a baseline of 60,000 buy volume and 40,000 sell volume, with a 1% step change on the buy_volume field.

## When to prefer this

Choose this endpoint when you need a deterministic, bounded elasticity coefficient for the token buy volume fraction at a specific baseline — not a live market scan or trade recommendation. Ideal for pre-trade sensitivity analysis, model calibration, or understanding how a fixed volume ratio responds to marginal changes, without requiring live data feeds.

## Known failure modes

- buy_volume or sell_volume is zero or negative — violates exclusiveMinimum constraint
- step_percent outside 0.01–10 range causes validation error
- Missing required baseline fields returns schema validation error
- Payment not included or insufficient USDC causes 402 response

## How this service works

Token buy volume fraction — Local finite-change elasticity: Local finite-change elasticity for Token buy volume fraction. Supplied token observations only. Deterministic calculation or caller-threshold verdict, not a live scan, safety proof or trade recommendation. Specialised preset in a shared 50-profile, 20-operation engine. 0.01 USDC includes one bounded local finite-change elasticity report.

## Output

A bounded local finite-change elasticity report for the token buy volume fraction, showing how much the buy volume fraction changes proportionally in response to a finite percentage step change in the specified field (buy_volume or sell_volume), computed deterministically from the supplied baseline volumes.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "field": {
   "enum": [
    "buy_volume",
    "sell_volume"
   ],
   "type": "string",
   "default": "buy_volume"
  },
  "baseline": {
   "type": "object",
   "default": {
    "buy_volume": 60000,
    "sell_volume": 40000
   },
   "required": [
    "buy_volume",
    "sell_volume"
   ],
   "properties": {
    "buy_volume": {
     "type": "number",
     "default": 60000,
     "maximum": 10000000000000000,
     "minimum": 0,
     "exclusiveMinimum": 0
    },
    "sell_volume": {
     "type": "number",
     "default": 40000,
     "maximum": 10000000000000000,
     "minimum": 0,
     "exclusiveMinimum": 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/token-buy-volume-fraction-local-finite-change-elasticity-a944afab/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)