# x402engine Crypto Price API

> x402engine Crypto Price API is a paid API for AI agents from x402engine.app, paid per call via x402, $0.001000/call, status unknown (last checked 2026-09-13).

Returns the real-time price of any cryptocurrency in any specified fiat currency

## Facts

- Endpoint: GET https://x402engine.app/api/crypto/price
- Price: $0.001000/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402engine-app-5506f515
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_3MxfEk8cGLjkTZHL87rCE

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-app-5506f515
```

Example prompt: What is the current price of Ethereum in USD? Also grab the live price of Solana in EUR while you're at it.

## When to prefer this

Use this endpoint when an AI agent needs real-time spot prices for any cryptocurrency in any fiat denomination, especially in automated workflows requiring live market data. Prefer this over cached or delayed price sources when freshness matters. Well-suited for agents handling financial calculations, portfolio tracking, or conversion queries across a broad range of coins and currencies.

## Known failure modes

- Unsupported or unrecognized cryptocurrency symbol returns an error
- Unsupported fiat currency code returns an error
- Network or upstream data feed issues may cause temporary unavailability
- Missing required query parameters returns a 400 bad request
- Rate limiting or payment failure returns a 402 payment required

## How this service works

Real-time cryptocurrency prices for any coin in any fiat currency

## Output

Returns the current real-time price of the requested cryptocurrency denominated in the specified fiat currency, including the coin identifier and exchange rate value.

## Example request

```json
{
 "ids": "bitcoin,ethereum",
 "vs_currencies": "usd,eur"
}
```

## 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",
     "required": [
      "ids"
     ],
     "properties": {
      "ids": {
       "type": "string",
       "example": "bitcoin,ethereum",
       "description": "Comma-separated coin IDs (e.g. bitcoin,ethereum)"
      },
      "currencies": {
       "type": "string",
       "default": "usd",
       "example": "usd,eur",
       "description": "Comma-separated fiat currencies"
      },
      "include_24h_change": {
       "type": "boolean",
       "default": true,
       "description": "Include 24h price change"
      },
      "include_market_cap": {
       "type": "boolean",
       "default": false,
       "description": "Include market cap"
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402engine-app-5506f515/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)