# x402engine Crypto Markets List

> x402engine Crypto Markets List is a paid API for AI agents from x402engine.app, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-13).

Returns paginated cryptocurrency market data including prices, market caps, and rankings for all coins, filterable by category and currency

## Facts

- Endpoint: GET https://x402engine.app/api/crypto/markets
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402engine-crypto-markets-list-5cd131b1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_QRETmE-19A6oGOfluh9Cv

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 x402engine-crypto-markets-list-5cd131b1
```

Example prompt: Show me the top 100 cryptocurrencies ranked by market cap in USD, and filter to just DeFi tokens — page 1.

## When to prefer this

Choose this endpoint when you need a broad, ranked list of cryptocurrency market data across many coins rather than a single coin lookup. Ideal for market overviews, sector analysis (via category filter), portfolio screening, or building dashboards. Prefer the single-coin price sibling endpoint when you only need one specific coin's price.

## Known failure modes

- Invalid category ID returns empty results or 404
- Page number exceeding 500 returns empty array
- Limit exceeding 250 rejected with validation error
- Unsupported fiat currency code returns error
- Insufficient USDC balance causes 402 payment failure before data is returned

## How this service works

Market rankings with price, volume, market cap — filterable by category

## Output

A paginated array of cryptocurrency market objects, each containing coin ID, symbol, name, current price in the requested fiat currency, market capitalization, 24-hour trading volume, price change percentages, and market cap rank. Data covers all coins or a specific category, sorted by the requested order.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "page": {
       "type": "number",
       "default": 1,
       "example": 1,
       "description": "Page number (1-500)"
      },
      "limit": {
       "type": "number",
       "default": 100,
       "example": 100,
       "description": "Number of results (1-250)"
      },
      "order": {
       "type": "string",
       "default": "market_cap_desc",
       "example": "market_cap_desc",
       "description": "Sort order"
      },
      "category": {
       "type": "string",
       "example": "decentralized-finance-defi",
       "description": "Filter by category ID"
      },
      "currency": {
       "type": "string",
       "default": "usd",
       "example": "usd",
       "description": "Fiat currency for pricing"
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402engine-crypto-markets-list-5cd131b1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402engine.app](https://www.zero.xyz/host/x402engine.app/llms.txt)