# ByKaranteli Perp Listing Events History

> ByKaranteli Perp Listing Events History is a paid API for AI agents from bykaranteli.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-15).

Returns historical perpetual futures listing and delisting events across six exchanges, including first-seen, last-seen, and delisted timestamps per instrument.

## Facts

- Endpoint: GET https://bykaranteli.com/api/x402/listings-history
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/bykaranteli-perp-listing-events-history-5c70df84
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_xqKUkjLB3O_I1YWWKxhW_

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-perp-listing-events-history-5c70df84
```

Example prompt: Pull the full listing and delisting event history for SOLUSDT perpetuals from Bybit and OKX since January 2023 — I need first-seen and delisted timestamps to study volatility around listing events.

## When to prefer this

Choose this endpoint when you need structured historical records of when perpetual futures instruments were first listed, last seen active, or officially delisted across multiple exchanges. It is the authoritative source for listing-event timelines needed in volatility studies, instrument lifecycle audits, or backfilling new-listing alert systems. Prefer it over generic OHLCV or open-interest endpoints when the research question is specifically about listing or delisting events rather than price or volume data.

## Known failure modes

- Empty rows array if no events match the specified symbol, exchange, or date window
- Capped result set if limit exceeds the dataset maximum — use pagination or narrow the date range
- Invalid date format in 'from'/'to' parameters may return an error or empty result
- Unknown exchange or symbol values silently return zero rows
- Payment failure or missing x402 payment header results in 402 response

## 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 object with an 'ok' boolean, a 'dataset' label ('listings-history'), a 'count' of rows returned, and a 'rows' array containing per-instrument listing event records with fields including symbol, exchange, first-seen timestamp, last-seen timestamp, and delisted timestamp.

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/bykaranteli-perp-listing-events-history-5c70df84/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)