# Vextorium CEX On-Chain Reserves

> Vextorium CEX On-Chain Reserves is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-10-16).

Returns on-chain reserve data for major centralized exchanges (Binance, OKX, Bybit, Coinbase, etc.) including total reserves, net inflows/outflows over 24h/7d/30d, and spot/derivatives trading volumes.

## Facts

- Endpoint: POST https://api.vextorium.com/cex-reservas-pago?utm_source=zero.xyz
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/vextorium-cex-on-chain-reserves-1e00607c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_IBD517wisyYZu-3Yz_bZB

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 vextorium-cex-on-chain-reserves-1e00607c -d '<json body>'
```

Example prompt: Show me the top 10 centralized exchanges ranked by on-chain reserves right now, including their 24-hour net inflows and outflows and any derivatives open interest figures.

## When to prefer this

Use this endpoint when you need on-chain verified reserve data for centralized exchanges rather than self-reported figures, especially when monitoring for reserve outflows, comparing exchange solvency, or analyzing market activity across spot and derivatives. Prefer this over generic market data APIs when the on-chain provenance of reserve figures matters.

## Known failure modes

- Unknown exchange name in 'buscar' field returns empty results or null entries
- Invalid 'orden' enum value causes request failure
- Server-side data freshness issues if exchange wallets are not recently indexed
- Rate limiting or payment failure returns non-200 response
- Null values for some fields when an exchange does not publish derivatives data

## How this service works

On-chain reserves of centralized exchanges (Binance, OKX, Bybit, Coinbase...) from their published wallets: total and ex-own-token assets, net inflows/outflows over 24h, 7d and 30d, spot and derivatives volume and open interest. Sort by reserves or flows.

## Output

Returns a list of centralized exchanges with their on-chain reserve totals (USD), reserves excluding their own native token (USD), net inflow/outflow figures for 24h, 7d, and 30d periods (USD), 24h spot trading volume (USD), 24h derivatives trading volume (USD), open interest (USD), and associated wallet addresses. Also includes metadata such as the sort order applied and data source attribution.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "orden": {
   "enum": [
    "reservas",
    "entradas_24h",
    "salidas_24h",
    "entradas_7d",
    "salidas_7d",
    "derivados"
   ],
   "type": "string"
  },
  "buscar": {
   "type": "string"
  },
  "limite": {
   "type": "integer"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/vextorium-cex-on-chain-reserves-1e00607c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.vextorium.com](https://www.zero.xyz/host/api.vextorium.com/llms.txt)