# CEX Cryptocurrency Arbitrage Opportunities

> CEX Cryptocurrency Arbitrage Opportunities is a paid API for AI agents from market.memoryapi.org, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).

Returns cross-exchange cryptocurrency arbitrage opportunities by comparing best buy and sell prices across major centralized exchanges.

## Facts

- Endpoint: GET https://market.memoryapi.org/x402/market/cex_arb
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/market-memoryapi-org-dbabc25f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_nl1DTvinZuRlblu8K5RfO

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 market-memoryapi-org-dbabc25f
```

Example prompt: Find the best cross-exchange arbitrage opportunities for Bitcoin and Ethereum right now — show me where to buy cheapest and sell highest across major CEXes and what the spread looks like.

## When to prefer this

Use this endpoint when you need real-time cross-exchange cryptocurrency arbitrage data to identify buy/sell price discrepancies across major CEXes. Prefer this over manual price comparison or generic ticker endpoints when the specific goal is finding exploitable price gaps between exchanges rather than just tracking a single price.

## Known failure modes

- Exchange data unavailable or stale — returns partial results or error if one or more exchanges are unreachable
- Invalid or unsupported trading pair — returns empty results or 404
- Rate limit exceeded — returns 429 if called too frequently
- Payment not processed — returns 402 if x402 payment header is missing or insufficient

## How this service works

Cross-exchange cryptocurrency arbitrage opportunities. Find best buy/sell prices across major exchanges.

## Output

A list of arbitrage opportunities across major centralized cryptocurrency exchanges, showing the best available buy price (lowest ask), best sell price (highest bid), the exchanges offering those prices, and the calculated spread or potential profit margin for each trading pair.

## Example request

```json
{
 "cik": "0001067983",
 "institution": "Berkshire Hathaway"
}
```

## Request schema (JSON Schema)

```json
{
 "properties": {
  "input": {
   "required": [
    "method"
   ],
   "properties": {
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/market-memoryapi-org-dbabc25f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from market.memoryapi.org](https://www.zero.xyz/host/market.memoryapi.org/llms.txt)