# Token Annualised Simple Issuance Rate — Before and After Comparison

> Token Annualised Simple Issuance Rate — 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 2026-10-15).

Calculates and compares the annualised simple token issuance rate between two time periods (before and after), returning a deterministic before/after comparison report.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-bx-token-issuance-rate-compare?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-annualised-simple-issuance-rate-before-and-after-comparison-54f0f13a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_7kxqo-MaZ1vnReNDtRrGh

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-annualised-simple-issuance-rate-before-and-after-comparison-54f0f13a -d '<json body>'
```

Example prompt: Compare the annualised simple token issuance rate before and after a protocol update: before, 1000 tokens were issued over 30 days from a starting supply of 1,000,000; after, 1100 tokens were issued over 33 days from a starting supply of 1,100,000.

## When to prefer this

Choose this endpoint when you have two discrete token observation windows and need a deterministic, reproducible annualised simple issuance rate comparison — no live blockchain access, no market data feed, just pure arithmetic over caller-supplied inputs. Ideal for governance reporting, protocol audits, or tokenomics modelling where you control the input data and need a bounded, verifiable calculation at minimal cost.

## Known failure modes

- Missing required fields (issued_tokens, starting_tokens, or period_days) in either before or after object returns a validation error
- starting_tokens or period_days of zero triggers an exclusiveMinimum violation
- Values exceeding the maximum allowed (1e16) will be rejected
- Malformed JSON body returns a parse error
- Payment of 0.01 USDC not provided or invalid x402 payment header results in a 402 response

## How this service works

Token annualised simple issuance rate — Before and after comparison: Before and after comparison for Token annualised simple issuance rate. 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 before/after comparison report containing the annualised simple issuance rate for each of the two supplied observation windows (before and after), along with a deterministic comparison verdict or delta, derived purely from the caller-supplied token observations — not a live blockchain scan or trade recommendation.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "after": {
   "type": "object",
   "default": {
    "period_days": 33,
    "issued_tokens": 1100,
    "starting_tokens": 1100000
   },
   "required": [
    "issued_tokens",
    "starting_tokens",
    "period_days"
   ],
   "properties": {
    "period_days": {
     "type": "number",
     "default": 30,
     "maximum": 10000000000000000,
     "minimum": 0,
     "exclusiveMinimum": 0
    },
    "issued_tokens": {
     "type": "number",
     "default": 1000,
     "maximum": 10000000000000000,
     "minimum": 0
    },
    "starting_tokens": {
     "type": "number",
     "default": 1000000,
     "maximum": 10000000000000000,
     "minimum": 0,
     "exclusiveMinimum": 0
    }
   },
   "additionalProperties": false
  },
  "before": {
   "type": "object",
   "default": {
    "period_days": 30,
    "issued_tokens": 1000,
    "starting_tokens": 1000000
   },
   "required": [
    "issued_tokens",
    "starting_tokens",
    "period_days"
   ],
   "properties": {
    "period_days": {
     "type": "number",
     "default": 30,
     "maximum": 10000000000000000,
     "minimum": 0,
     "exclusiveMinimum": 0
    },
    "issued_tokens": {
     "type": "number",
     "default": 1000,
     "maximum": 10000000000000000,
     "minimum": 0
    },
    "starting_tokens": {
     "type": "number",
     "default": 1000000,
     "maximum": 10000000000000000,
     "minimum": 0,
     "exclusiveMinimum": 0
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/token-annualised-simple-issuance-rate-before-and-after-comparison-54f0f13a/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)