# ZARONIA Daily Rate & Transition Data (zaref.dev)

> ZARONIA Daily Rate & Transition Data (zaref.dev) is a paid API for AI agents from zaref.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-18).

Returns the current ZARONIA overnight benchmark rate, its daily history, and JIBAR transition timeline as cited JSON with source URL, effective date, and freshness flag.

## Facts

- Endpoint: GET https://zaref.dev/v1/zaronia?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-18
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/zaronia-daily-rate-transition-data-zaref-dev-e0ae06fa
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_7fMCp83jtPlfM9V2Rxt0V

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 zaronia-daily-rate-transition-data-zaref-dev-e0ae06fa
```

Example prompt: What is today's ZARONIA overnight benchmark rate in South Africa, and is it fresh? I need the official source URL and effective date so I can use it in a compounded interest calculation.

## When to prefer this

Use this endpoint when you need the authoritative current ZARONIA rate (SARB's designated JIBAR successor) for South African financial calculations, loan pricing, derivative valuations, or compounded interest — especially when you need a cited, source-linked JSON response with a freshness indicator and transition timeline context.

## Known failure modes

- Rate data not yet published for today — freshness flag indicates stale data
- Network or upstream SARB source unavailable — service may return cached or error response
- Payment not processed (x402) — request rejected before data is returned

## How this service works

South African ZARONIA benchmark rate (SARB's ZARONIA risk-free overnight benchmark, the designated JIBAR successor (JIBAR ceases 2026-12-31), with the transition timeline and daily-rate history for compounded interest calculations.) Clean cited JSON with official source URL, effective date and freshness flag.

## Output

A JSON object containing the current ZARONIA daily rate, its effective date, a freshness flag, a citation URL pointing to the official SARB source, and historical daily-rate data points for compounded interest calculations, plus the JIBAR transition timeline.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "data": "current values with citations",
  "stale": false,
  "series": "zaronia",
  "source_url": "https://www.resbank.co.za/en/home/what-we-do/financial-markets/south-african-overnight-index-average",
  "effective_date": "2026-07-23"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/zaronia-daily-rate-transition-data-zaref-dev-e0ae06fa/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from zaref.dev](https://www.zero.xyz/host/zaref.dev/llms.txt)