# ByKaranteli Coinbase Premium History

> ByKaranteli Coinbase Premium History is a paid API for AI agents from bykaranteli.com, paid per call via x402, $0.005/call, status down (last checked 2026-10-13).

Returns daily Coinbase-vs-offshore BTC price spread history, showing US spot demand by comparing Coinbase prices against offshore exchange prices.

## Facts

- Endpoint: GET https://bykaranteli.com/api/x402/premium-history?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: down
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/bykaranteli-coinbase-premium-history-3d61cd7f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_jrTdlyqIW8QaypZZ9gq56

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 bykaranteli-coinbase-premium-history-3d61cd7f
```

Example prompt: Pull me the daily Coinbase premium history for BTC from 2024-01-01 to 2024-06-30 — I want to see both the Coinbase and offshore leg prices along with the spread for each day.

## When to prefer this

Choose this endpoint when you need daily historical Coinbase vs offshore price spread data as a proxy for US Bitcoin spot demand. It is the right choice for macro signal analysis, basis trading research, or any workflow requiring both legs of the Coinbase premium spread on a per-day basis. Prefer it over generic OHLCV or funding rate endpoints when the specific Coinbase-vs-offshore differential is the signal of interest.

## Known failure modes

- Invalid or unsupported symbol returns empty rows or error
- Date range outside available history returns empty result set
- Limit exceeds dataset cap, silently clamped to maximum
- Malformed date strings in from/to parameters cause request failure
- Payment not included or insufficient causes 402 rejection

## How this service works

Track verified crypto futures signals with live win rate, profit factor, funding data, and liquidation maps. Deterministic, auditable, operator-first.

## Output

A JSON array of daily rows with the dataset name, row count, and each row containing the date, symbol, Coinbase price, offshore price, and the premium spread between them.

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "rows": [],
  "count": 500,
  "dataset": "premium-history"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/bykaranteli-coinbase-premium-history-3d61cd7f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from bykaranteli.com](https://www.zero.xyz/host/bykaranteli.com/llms.txt)