# Token Buy-to-Sell Activity Ratio — Local Finite-Change Elasticity

> Token Buy-to-Sell Activity Ratio — 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).

Computes the local finite-change elasticity of the token buy-to-sell activity ratio given a baseline buy/sell count and a percentage step size.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-bx-token-buy-sell-ratio-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-to-sell-activity-ratio-local-finite-change-elasticity-340904ce
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_p4SLQ0Bb0unitGDoY45Aq

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-to-sell-activity-ratio-local-finite-change-elasticity-340904ce -d '<json body>'
```

Example prompt: Can you calculate the local finite-change elasticity of the token buy-to-sell ratio using a baseline of 120 buy counts and 80 sell counts, measuring sensitivity on the buy_count field with a 1% step?

## When to prefer this

Choose this endpoint when you need a deterministic, point-in-time sensitivity metric for how a token's buy-to-sell ratio responds to marginal changes in activity counts. It is ideal for quantitative agents performing local sensitivity analysis or elasticity profiling on supplied token observation data, rather than for live market scanning or real-time price feeds.

## Known failure modes

- sell_count of 0 would violate exclusiveMinimum constraint and cause a validation error
- step_percent outside [0.01, 10] range returns a validation error
- Missing required baseline fields (buy_count or sell_count) causes schema rejection
- Extremely large baseline values near the 10^16 limit may produce precision edge cases
- Non-numeric field values cause input validation failure

## How this service works

Token buy-to-sell activity ratio — Local finite-change elasticity: Local finite-change elasticity for Token buy-to-sell activity ratio. 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

Returns a bounded local finite-change elasticity report for the token buy-to-sell activity ratio, reflecting how the ratio changes in response to a small percentage perturbation of the selected field (buy_count or sell_count) around the provided baseline values. This is a deterministic calculation, not a live market scan or trade recommendation.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "field": {
   "enum": [
    "buy_count",
    "sell_count"
   ],
   "type": "string",
   "default": "buy_count"
  },
  "baseline": {
   "type": "object",
   "default": {
    "buy_count": 120,
    "sell_count": 80
   },
   "required": [
    "buy_count",
    "sell_count"
   ],
   "properties": {
    "buy_count": {
     "type": "number",
     "default": 120,
     "maximum": 10000000000000000,
     "minimum": 0
    },
    "sell_count": {
     "type": "number",
     "default": 80,
     "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-to-sell-activity-ratio-local-finite-change-elasticity-340904ce/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)