# Token Execution Fee Burden — Before and After Comparison

> Token Execution Fee Burden — Before and After Comparison is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-16).

Compares token execution fee as a percentage of notional value between two scenarios (before and after), reporting the change in fee burden.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-bx-token-fee-burden-compare?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/token-execution-fee-burden-before-and-after-comparison-2f49de22
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap__972HEKz9qvHItgnYBVAg

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-before-and-after-comparison-2f49de22 -d '<json body>'
```

Example prompt: Compare my token execution fee burden before and after: previously the fee was $2 on a $1000 notional, and now the fee is $2.20 on a $1100 notional — show me how the fee-to-notional ratio changed between the two.

## When to prefer this

Use this endpoint when you need a deterministic, single-call comparison of token execution fee burden (fee as a fraction of notional) across exactly two scenarios. Prefer it over batch endpoints when you have one before/after pair and want a focused change report rather than a table or distribution. It is not a live market scanner or safety checker — use it only for supplied, known values.

## Known failure modes

- notional_usd of zero triggers validation error (excluded by exclusiveMinimum constraint)
- missing required fields (fee_usd or notional_usd) in either before or after object returns schema validation error
- extremely large values may produce precision edge cases
- payment failure results in 402 response with no calculation performed

## How this service works

Token execution fee relative to notional — Before and after comparison: Before and after comparison 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 before and after comparison report.

## Output

A structured report containing the fee-to-notional ratio for both the before and after scenarios, the absolute and relative change between them, and a deterministic verdict indicating whether fee burden improved, worsened, or stayed the same relative to a caller-defined threshold.

## 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-before-and-after-comparison-2f49de22/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)