# Vextorium Crypto On-Chain Price (USD/EUR)

> Vextorium Crypto On-Chain Price (USD/EUR) is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.01/call, status down (last checked 2026-10-19).

Returns the current USD and EUR price of a major cryptocurrency or Base-chain token using Chainlink on-chain data feeds.

## Facts

- Endpoint: POST https://api.vextorium.com/v1/crypto-price-onchain?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: down
- Last checked: 2026-10-19
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/vextorium-crypto-on-chain-price-usd-eur-1635d1aa
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_9Jd8WXRyuk4tbSJ53MJz4

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-crypto-on-chain-price-usd-eur-1635d1aa -d '<json body>'
```

Example prompt: What's the current on-chain price of Ethereum in USD and EUR right now, sourced from Chainlink on Base?

## When to prefer this

Choose this endpoint when you need a cryptographically verifiable, on-chain price sourced from Chainlink for Bitcoin, Ethereum, major stablecoins (USDC, USDT, DAI), or any token on the Base EVM chain — and you need both USD and EUR prices in a single call. Prefer this over off-chain REST price APIs when on-chain data provenance matters (e.g. DeFi automation, audit trails, or smart contract-adjacent workflows).

## Known failure modes

- Unsupported currency string returns null price fields or an error
- Invalid Base token contract address returns null or an error response
- Chainlink feed temporarily unavailable may return null values
- Network latency on Base chain may cause stale or delayed price data

## How this service works

558 pay-per-call data APIs for AI agents: Solana and EVM on-chain data, tokenized stocks, DeFi, Hyperliquid, economy and official statistics, FX, validation, web and developer tools. Pay in USDC via x402.

## Output

Returns a JSON object with the token name (e.g. 'BTC'), the data source (e.g. 'Chainlink Data Feeds (on-chain, Base)'), and the current price in both USD and EUR as floating-point numbers.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "currency": {
   "type": "string",
   "description": "bitcoin, ethereum, usdc, usdt, dai, or a Base token address"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "name": "BTC",
  "source": "Chainlink Data Feeds (on-chain, Base)",
  "price_eur": 74043.7,
  "price_usd": 84431.02
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/vextorium-crypto-on-chain-price-usd-eur-1635d1aa/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)