# Token Execution Fee Burden Waterfall — Sequential Input-Change Attribution

> Token Execution Fee Burden Waterfall — 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 2026-10-15).

Computes a sequential (waterfall) attribution of how changes in fee_usd and notional_usd individually drive the change in a token's execution fee burden (fee relative to notional).

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-bx-token-fee-burden-waterfall?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/token-execution-fee-burden-waterfall-sequential-input-change-fe052ec4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_sIyQFnXNVKmpQKLxh2WeK

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-execution-fee-burden-waterfall-sequential-input-change-fe052ec4 -d '<json body>'
```

Example prompt: Can you do a waterfall attribution on why my token execution fee burden changed — before it was a $2 fee on a $1000 trade, and after it's a $2.20 fee on an $1100 trade? I want to see how much of the ratio shift came from the fee change versus the notional change.

## When to prefer this

Use this endpoint when you need a deterministic, ordered decomposition of what drove a change in token execution fee burden between two snapshots — specifically when you want to isolate the marginal contribution of the fee amount versus the notional trade size. Prefer this over generic ratio-change calculators when you need a structured waterfall attribution report rather than just a delta, and when you want a caller-supplied input comparison (not a live market scan or trade recommendation).

## Known failure modes

- notional_usd of zero (excluded by exclusiveMinimum constraint) causes validation error
- missing required fields (fee_usd or notional_usd in either before or after objects) returns schema validation error
- before and after states identical yields zero attribution across all inputs
- extremely large values near the 1e16 maximum may produce floating-point precision artifacts
- malformed JSON body returns 400-level error

## How this service works

Token execution fee relative to notional — Sequential input-change attribution: Sequential input-change attribution for Token execution fee relative to notional. 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 sequential input-change attribution report.

## Output

A deterministic sequential input-change attribution report showing how each input variable (fee_usd and notional_usd) individually contributed to the overall change in the token execution fee burden (fee/notional ratio) between the before and after states, following a waterfall decomposition methodology.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "after": {
   "type": "object",
   "default": {
    "fee_usd": 2.2,
    "notional_usd": 1100
   },
   "required": [
    "fee_usd",
    "notional_usd"
   ],
   "properties": {
    "fee_usd": {
     "type": "number",
     "default": 2,
     "maximum": 10000000000000000,
     "minimum": 0
    },
    "notional_usd": {
     "type": "number",
     "default": 1000,
     "maximum": 10000000000000000,
     "minimum": 0,
     "exclusiveMinimum": 0
    }
   },
   "additionalProperties": false
  },
  "before": {
   "type": "object",
   "default": {
    "fee_usd": 2,
    "notional_usd": 1000
   },
   "required": [
    "fee_usd",
    "notional_usd"
   ],
   "properties": {
    "fee_usd": {
     "type": "number",
     "default": 2,
     "maximum": 10000000000000000,
     "minimum": 0
    },
    "notional_usd": {
     "type": "number",
     "default": 1000,
     "maximum": 10000000000000000,
     "minimum": 0,
     "exclusiveMinimum": 0
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/token-execution-fee-burden-waterfall-sequential-input-change-fe052ec4/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)